1997 Fort Collins flood (folder 2 of 4)

FROM: Jit Mirshborn, Mountain States Weather Services

tO: City of Fort Collins

Lariter County Etergency Managetent

Poudre and Thoapson Valley Schools

ISSUED:

1900

MDT, TUESDAY, JULY

29, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAHXS

HMS FLASH FLOOD WATCH COHTIHUES THROUGH MIDHIGHT FOB EASTERS

LARIMER COUHTY, THE FBOHT RAMGE !MD MEIGHBOBIHG PLAIHS COUHTIES.

RADAR UPDATE .•. thunderstorts are developing in the Estes Park

area and along the gestern Lariter border.

A spotter

21/2

tiles north of the lstes dat reported

.30

inches of

rain fro•

1830

through

1850

and still raining toderately.

Thunderstorts will continue to develop during the next

30

tinutes to

60

tinutes over Lariter County and tove northeastward at

10

to

15

tph.

Rainfall rates 1ay be up to

1

inch per hour in so1e of these storts.

Lighter showers are in the vicinity of Fort Collins at this ti1e, also

toving northeast at

10

to

15

tph.

Me will 1onitor closely. Maintain the Flash Flood Match!

fROM: Jia Hirshborn, Mountain States Heather Services

TO: City of fort Collins

Lariaer County Eaergency Kanageaent

Poudre and Thoapson Valley Schools

ISSUED: 2015 MDT, TUESDAY, JULY 29, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAH!S

KHS fLASH fLOOD HATCH COMriHOES THROUGH MIDHISHT FOR EASTERH

LARIMER COOHTY, THE fROST RAISE AHD MEISHBORIHG PLAINS COUNTIES.

RADAR AND SPOTTER REPORTS INDICATE MODERATE TO LOCALLY HEAVY RAINfALL

OVER KOCH OF EASTERS LARIMER COOHTY, IHCLODIKG THE fORT COLLIHS AREA.

RAIRFALL RATE OF .25 TO .50.IHCHES PER HOUR ARK OCCURRING ARD HILL

CAUSE URBAN STREET FLOODIKS IH PARTS OF FORT COLLINS A!D LOVELAND FOR

THE HEIT 30 TO 60 MINUTES.

THIS STORM IS MOT STATIONARY LI!E LAST RIGHT'S STORKS AHD IS MOVIHG

HORTHEAST 10 TO 15 MPH.

HHHH

FROM: Ji1 Mirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lari1er County K1ergency Manage1ent

Poudre and Tho1pson Valley Schools

ISSUED:

20.5

MDT, TUESDAY, JULY

29, 1997

DISPATCHERS PLXASX RXLAY TO YOUR "OK GALL" PKOPLK .•• THAM!S

. KMS FLASH FLOOD MARHIHG HORTHCKHTRAL LARIMER COUKTY TILL

2330

KMS URBAS ARD SMALL STREAM FLOOD ADVISORY

2330

FOR KASTCKHTRAL

LARIMER COUHTY AHD MKST CKHTRAL MELD COUHTY.

FLASH FLOOD MATCH COMTIHUKS THROUGH MIDRIGHT FOR EASTERS LARIMER COUNTY,

THE FROST RAHGE AHD SEIGHBORISG FLAIRS COUSTIES.

RADAR IHDICATES A SOLID LIME OF HEAVY THORDERSTORMS MOVISG OUT OF

LARIMER COUHTY IRTO MELD COUMTY AT THIS TIME.

THOUGH IT MAY TA!E AH HOUR OR MORE FOR THE WATERS TO RUHOFF, ADDITIONAL

SIGHIFICAHT RAINFALL .. IH LARIMER COUHTY APPEARS TO BE LIMITED FOB THE

BEST OF THE EVEHIHG AS THE STORMS ARK MOVIRG EASTWARD HOM.

HMHH

~ROM:

Ji• Wirshborn, Mountain States Weather Services

tO: City of ¥ort Collins

Lariaer County Eaergency Manageaent

Poudre and thoapson Valley Schools

ISSUED:

2145

MDT, TUESDAY, JULY

29, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PKOPLK •.. THAH!S

HMS

~LASH

FLOOD W!RHIHG HORTBCEMTRAL LARIMER COUHTY TILL 2330

HMS URBAH !BD SMALL STREAM FLOOD ADVISORY C!MCELKD FOR K!STCEHTRAL

LARIMER COUHTY !MD MEST CEBTRAL WELD COUHTY.

FLASH tLOOD HAtCH COKtlKo!s TBROOGR

nifiKIGBT

ron

!AST~RM

tAfi!HRfi BbONfY,

THK ¥ROHT RAMGK !MD HKIGBBORIHG PLAIHS COUBTIKS.

Radar indicates the heavy rains have aoved into Meld County. There

doesn't appear to be significant chance of additional developaent in

Lariaer County.

The Urban and Saall Strea1 flood Advisory fro• BMS was canceled at

2115.

KWS Forecaster at DenYer plans to terainate the flash flood warning for

northeast Lariaer County around 2200-2300.

At MSWS we received .60 inches of rain in about

45

tinutes tile while .

Virginia Dale 7KME recorded

1.94

inches in about a hour.

This will be the last report unless conditions warrant or unless you

call ••. please use the unlisted nuaber if you need to reach 1e. Thanks

BBNN

fROM: Jia

~irshborn,

Mountain States

~eather

Services

TO: City of fort Collins

Lariter County Etergency Manage1ent

Poudre and Thotpson Valley Schools

ISSUED: 0430 MDT,

~EDBESDAY, JULY 30,

1997

DISPATCHERS PLEASE RELAY TO YOUR "OM CALL" PEOPLE .•• THAH!S

Can see no big differences in the weather laps today. The tropical

toisture retains in place at the surface and aloft with dew points

near to above

60.

Already heavy rains are occuring on the plains

east of Lariter County and radar returns are widespread to the

. south with a northward slow tovetent. Low pressure over the southwest

part of the US and high pressure over Teias will continue to feed

copious atounts of toisture into the area and the day's

heat

will be

enough to kick up storts this afternoon and tonight with slow tovetent

and heavy rain.

!S~S

LARIMER COUNTY fORECAST ••• cloudy with areas

of

fog this torning

and Jaybe a few sprinkles. Clouds with a few breaks early in the

afternoon and a

50

percent chance of thunderstorts after

1400.

Thunderstoras

likely in the area through tidnight.

The strongest storts could produce

2-3

inch per hour rainfall rates and

should aove fro• south to north at only

10

to

15

Jph. Already vet ground

vill handle less than an inch of rain before rapid runoff occurs vith

prite tile for any flooding to occur after

1600.

He'll update this forecast as the new data cotes· in this torning,

HIRSHBORN

HHHH

FROM: Ji1 Hirshborn, Mountain States Heather Services

TO: City of fort Collins

Lari1er County E1ergency Manage1ent

Poudre and Tho1pson Valley Schools

ISSUED:

0950

MDT,

HEDHESDAY, JULY

30, 1997

DISPATCHERS PLEASE RELAY TO

YOUR "OB

CALL" PEOPLE ... TH!HKS

BHS FLASH FLOOD HATCH IS IB EFFECT FOR EASTERN LARIMER COUNTY !MD

NEIGHBORING COUNTIES TILL MIDNIGHT

KSHS LARIMER COUNTY FOREC!ST ... cloudy with areas of fog this 1orning

and 1aybe a few sprinkles. Clouds vith a fev breaks early in the

afternoon and a

70

percent chance of thunderstor1s after

1400.

Thunderstor.s

likely in the area through 1idnight •

. Tbe strongest stor1s could produce 2-3 inch per hour rainfall rates and

should 1ove fro• south to north at only

10

to

15

1ph. Already vet ground

viii handle less than an inch of rain before rapid runoff occurs vith

pri1e tile for any flooding to occur after

1600.

¥ROM: Jit Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lariaer County Etergency Managetent

Poudre and Thotpson Valley Schools

ISSUED:

1230

MDT, WEDMESDAY, JULY

30, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OM CALL" PEOPLE ... THAHIS

HWS FLASH FLOOD WATCH IS IM EFFECT FOR EASTERS LARIMER COUMTY AHD

HEIGHBORIHG COUHTIKS TILL MIDNIGHT

RADAR UPDATE ... thunderstorts are developing over the higher terrian of

Lariter County with .25 to .75 inch per hour rainfall rates possible

in the foothills sections within the hour.

Eastern sections of the county {urban areas) will start to cote under

the gun by

1(00

as stor1 activity also developes on the plains section

of the county.

MSWS LARIMER COUHTY ¥0RKCAST ... there is a

70

percent chance of

thunder-storts this afternoon and tonight.

The strongest storts could produce 2-3 inch per hour rainfall rates and

should 1ove frot south to north at only

10

to

15

tph. Already wet ground

will handle less than an inch of rain before rapid runoff occurs.

~~G~: Ji~ Wirshbor~. ~cuntain States ~eather Services

70~ Ci~y o~ ~ort Colli~s

Lari~er ~cunty :,erge~cy ~anagement

~ . .

?audre anc

7hc~~son

Valley

~cncclS

ISSUED: 0915

~Di, S~NDAY, JU~Y

27, 1997

\e•ica~ ~cis:ure

is in Jiace

o~er

northern Colorado and the afternoon

a~d ni~htt1~e ~iii

be

very

active

~lt~ ~eavy t~li~Gerstor~s.

(

~GR LARiME~ CDU~i¥

iHE

HS~S ~~~ECASi

:ALLS

~GR

.•.

tnu~derstcr~s ~eveicping

oy noon in t"e nigner sections and tcctniiis ana

the

?iains·by ear:y

aiternoon

~itn

a 50 percent

cha~ce

till 2300.

~argest ~ail ~ay

be

u~

to

cne

hal!

incM but

t~e sic~ move~e~t

c!

the

stcr~s

could

prcG~ce

rainfail

in

excess

of

tnree inches in an

~our.

Ceil mcve=ent •ill be variable in direttion at iess than 10 eph. lne

resulting heavy rains could easily cause s;aii

strea=

and

cree~

flooding

?ROM:

Ji~

Mirsbborn.

~ountain

S;ates Heather Services

TO: Ci:y

o~

Icr:

Collins

Lari~er County

imergency Hanagenen;

?oudre and

ibo~pson

Valle, Schools

ISSUED: i720

HDT, Su:IDAY, JUL'i

2i,

1997

DIS?A1C3ii5 ?LiASE

RELAY 10 YOUR

"ON CALL" PEOPLE ...

T~AN!S

S~V~RE ~~A?EER

OUTLOOK ...

THUND~9S¥03MS ~5J?TiNG Oi!i ~A3IH2i CGU~TY

.. .

radar sh0;s !ounaerstoras

developing ever

-:ne

Big

Tno:!lpson

in ;;he

vicini~y of }ra~e and Glen

Haven,

northeast&ard

to the viciai&y of Fort Collins.

Li~;;le sov~nent

is

ifidlcatad.

7bese cells appear

to

be for!ing along uinds gusting out of a

co~piex

of

stor~s

over Denver

~~icb

have produced street and snail streal flooding in

the Denver

Metro area.

tbe slo;

~oveDe9:

0f

the

stor~s

could produce

rainfa:;

in

~xcess

of three

inches in an hou:.

n direction at less

~han

resulting heavy raias could eas

ly

cause s:ail streaJ and creek

f:ooding

!~d

extensi7e

~rban floodi~g.

TO: City

of Fort Collins

~ari~er Coa~ty ~~ergency

Xanagenent

foud~e and

?to~pson

Valley Schoa:s

HHS

S~ALL ST3~AS

AHD

URBA~

FLOOD AJVISORY IS 15 2??iCT

F05

iA iCiKi;AL

LA3IHi3

COU51Y

TILL 7

P.~. 5~3

HAS IHGLVDiD

E2~;1~2, ~2SiGiH RA~ ?O~T

COLLINS, HAS05YILLi

LiYiRKO~E

AND

ii~S

?LACE IH iHi

A~YiSO~Y.

SEVi~i

NEATH!R OUTLOOK ...

?~ij~DERSTORHS

contitJne over

~ari~er Cc~:::y

...

rada~ s~!c~s.~hunderstor~s

~cntinJi~g over Jost of ~he ~as~ern

part

of

~ari~er County iith ~itt~e

~ovenen~.

A

spot~er

report near toe

~outb

of ;ist Canyon

ijdicst~d

3/4

of

an inch

of rain in about 30

~inu~es. Radar indicates rainfaii of !.5 inches in

eone eactions of

t~e

foo:hi]ls ues: of Fort Collin!

si~ce

the staras hegan

ebou~

&n hour or so ago.

?0~ ~A~:~~2 C0~5lY T~~ ~3~2 ?U~iGA~T CAL~S

?G& ...

::~:d~:s:)::~ ~~=~ ~ 5~

?ercen~ ~h~nce ~iii

23GD.

Larges~ nai~ ~ay

be

J?

:o

o~~ nai~ i~c~

bJt

~he

_.

_'

5low

_.

:ove~en: of the s:nrJs

_.

co·1:d

~ronJce ~Ei~~a~~ in ~xc~ss of t~r~~

1~cn~s

:n an leur.

t..

FRO~:

Ji=

~irsh~orn,

Mountain Stdtes

~eather

Services

iG: City

of rort Collins

Ldri~er

County

E~ergency ~anage~ent ?Gudrt~

3;'1d 1'no.':lpson Vai ley

3choois

iSSUE~:

1910

~D7, 5~NJAY,

JOLY 27, i997

iliS?ATCtiE~S

PLEASE

REUW

!I}

r'Oliii

'GN CALL"

P~~?LE

...

iriA1-<!i5

LARiME~

COUNiV

TILL 1930

("'J

i~CLUDES

8U7

~OT ~I~i;~J

TJ:

~GVE~~~~, 5E~7~~~~. ~AS~~V~~LE,

RIST

CANYO~,

LArDiliE,

liE 51 FGilT CGLUI-<S, UVEi1GRE, OiliL CPH:Jii ANli :.iEL. iliiiiGN

SEvERE

WEAiHER

OUTLOO~

•••

Heavy

rains have occurred

ire~ thunderstor~s

over

ano east

of

t~e

foothills

of

La~imer

County

riuri~g

the iast

two a;Jd haif

hours.

rtadar

es•i~ates she~

2.0+ totals, just north of

~asonviiie. S~otter re~cr:s

incicate cicse to

an inch in

~est

Loveland

a~d

an

o~server

9

~iles north~est

oi

Livernore

~ad

.40 inches in just 10 fflinutes. At nobntaln States

~eather

Services in

aast

rcrt

Coiiins only .03

i~ches

of

"4 ~ ) - ...

1 a a.1.t:11,

~adar

indicates

t~e i~te~sity

of the

stcr~ iS decre~sing

and tne·ceils

d'; nc~ ~cving

off

to~ard

the northeast at

10

to 15

~ph,

ir.

the next

t~o

hcurs :lost of

th~ thunderst~r.~s

i•l:

i

:e

ovEr ... ._" ~erha~;

anc:her .5

t~

.75 inche5 of rain

be~cre ~cvi~g ~ut

cf

Lari~~r

County,

s~a:t straa~s

are fuil in and near

~~e foot~i!1s J~t s~culd

subside

in tne

~ext

few hours.

Buc~hcrn

Creek

~:11 re~ain

high til!

~idnignt

and then

~-·.

FiOH:

Ji~ ~irshborl.

Mountain

States

~eather

Service!

~0: c~~y

of

~or~

Collies

La:!~e~ Ccun~y ~a~rgency 3anageae~t

?cGdre and ihonpeon ialiey Schools

ij~BAX AN~ 2~A~:

STREAM

~L001

ADVISGRY

?C~ 5JUTH~A3~ LA~i~23! EAST~RN 30~LDE1

AND

~OU7H~E5~

XELJ

CO~~TY 7~~0Uii~ 2iS~

·I~i~ ljC~~)~5 ~~7 ~0~ Li~i~~~ ~0: ~0a:~ G~~:;AL 3CJ~;~~, ~0~;xosf, 3~3i~OU~~

DAGCSU,

D~AK3, Ea~I, Fii~STON~, ~i~~~~IC~, FD~T LJF7C~, JCH~S?O~~. :07i~AND, ;yo~3. ~ASO&iiLL H~A~. !I~LI!IN, ~i~OT, f~ATiiViLL~. 5~V~~A~C~, ?IH~AIH

AND

WI~DSG3

SiVER!

~!AiHia

OG7LOOI ...

Altboug3 heavy rains are :oving out of

Lari~er Gou~~y.

nigh s:r!aa and

urba~ str~~:

flooding

~lii

linger for the

~ex~ no~r o~

so.

5o~e s:cr~

to1als and radar

eetia~es:

Maeonvilie

2~ rada~

2.0+

Lo7~land 35~

of r·ake

2.50

3c:Ee:co:~

Inie: Eay

2.i2

Sast

~art

Collins

.J3

...

.

. ~!!1

:e

:~~

PROM: Ji1 Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lari1er County K1ergency !anage1ent

Poudre and Tho1pson Valley Schools

ISSUED:

0415

MDT, MONDAY, JULY 28,

1997

DISPATCHERS PLEASE RELAY TO YOUR "ON CALL" PEOPLK •.• THAHXS

!SHS IS ISSUING AH "IHTKRHAL" FLASH FLOOD WATCH FOR TODAY AND TONIGHT.

Much of Lari1er County, the Front Range, the Denver Metro area and

Held counties and other counties of northeast Colorado has the potential

for two to four inches of rainfall by 1idnight.

At this hour, locally heavy rains continue in eastern Lari1er and

Western Weld Counties on already saturated ground.

Additional thunderstor• rains today and tonight are likely to cause

i

extensive s1all strea1 and creek flooding and urban street flooding.

We will evaluate conditions for river flooding as the day progresses

but with potential for 2-3 inch per hour JaiiJUI rainfall rates later

today all interests.should be on a high alert status.

ATTH: DIC! MIBOR OR "OM CALL" person ... do you vant service coverage

today? Please call and let 1e know one way or another. It appears ve

have a serious sitution developing today and tonight.

'ROM: Jia Mirshborn, Mountain States Heather Services

TO: City of ¥ort Collins

Lariaer County Eaergency Manageaent

Poudre and Tho1pson Valley Schools

ISSUED:

0415

MDT, MORDAY, JULY 28,

1997

DISPATCHERS PLEASE RELAY TO YOUR "OB CALL" PKOPLE .•• THAM!S

MSMS IS ISSUIBG AR "IMTERBAL" ¥LASH ¥LOOD MATCH ¥OR TODAY ARD TOBIGHT.

Much of Lariaer County, the front Range, the Denver Metro area and

Weld counties and other counties of northeast Colorado has the potential

for tvo to four inches of rainfall by aidnight.

At this hour, locally heavy rains continue in eastern ·Lari1er and

Western Weld Counties on already saturated ground.

Additional thunderstor1 rains today and tonight are likely to cause

extensive saall streaa and creek flooding and urban street flooding.

We vill evaluate conditions for river flooding as the day progresses

but vith potential for 2-3 inch per hour aaxiaua rainfall rates later

today all interests should be on a high alert status.

NSHH

fROH: Ji1 Mirshborn, Mountain States Heather Services

tO: City of fort Collins

Lari1er County !Jergency Hanage1ent

Poudre and tho1pson Valley Schools

ISSUED:

1000

HDT, HOBDAY, JULY 28,

1997

DISPAtCHERS PLEASE RELAY TO YOUR "OR CALL" PIOPLI ... THAMIS

HHS URB!H !MD SHALL STREAM fLOOD ADVISORY fOR !!STERR L!RIHIR COUHTY

THROUGH

1215

IHCLUDIHG fORT COLLIBS, BELLVUE, BUCIHORM HTH, DR!ll, GLIB

H!VKH, LIVIRHORI, LOVEL!BD, H!SOBVILLI, POUDRI PARI, TIDS PLACK,

YIRGIHI! DALE ABD HILLIHGTOH

.

!SMS "IHTIRHAL" fLASH fLOOD HATCH lOR TODAY !HD tOHIGHt.

!uch of Lari1er County, the front Range, the Denver Metro area and

Held counties and other counties of northeast Colorado has the potential

for tvo to four inches of rainfall by 1idnight.

Additional thunderstora rains today and tonight are likely to cause

extensive stall streaa and creek flooding and urban street

floodi~g.

MIRSHBORH

MHHH

FROM: Jia Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lariaer County Eaergency !anageaent

Poudre and Thoapson Valley Schools

ISSUED: 1200 MDT, MOHDAY, JULY 28, 1997

DISPATCHERS PLEASE RKLAY TO YOUR "OH CALL" PKOPLE •.• THAR!S

KWS URBAR !RD SMALL STREAM FLOOD ADVISORY KITEMDKD TILL 1400 FOR

KASTKRH LARIMER AHD NORTHWEST WELD COUHTY.

THIS IHCLUDES .•• Fort Collins, Loveland Berthoud, Bellvue, Teds Place,

Laporte, Wellington and Rockport.

!SWS "IHTERHAL" FLASH FLOOD WATCH FOR TODAY AHD TOHIGHT.

Much of Lariaer County, the Front Range, the Denver Metro area and

Weld counties and other counties of northeast Colorado have the potential

for two to four inches of rainfall by aidnight.

Additional thunderstora rains today and tonight are likely to cause

extensive saall streaa and creek flooding and urban street flooding.

We have received aeasured rain totals of five inches fro• the aouth of

the Poudre Canyon and aore than six inch "bucket" aeasureaents around

Laporte since yesterday evening. Radar has estiaated

4 inches of rain

just this aorning Just southwest of Poudre Park. Reaarkablly, while the

west and northwest parts of Fort Collins have had aore than an inch of

rain this aorning, at MSHS on Suaait View near 1-25 and Mulberry only

a few hundreths of an inch of rain has fallen this aorning.

HHHH

*

HOUS62 !GSP 282029

lTMGSP

lRKK TKIT MESSAGE

HATIOHAL HEATHER SERVICE GRKEHYILLK SPARTABBURG SC

~28

PB EDT MOB JUL 28 1997

07/28/97 2028Z :

!GSP BAC! OHLIHE.

_ I

!GSP 88D IS FUBCTIOHIRG PROPERLY AGAIR. THAH!S TO ALL SURROUHDIHG

Oll!CKS!

. FROM: Ji1 Nirshborn. Mountain States Heather Services

TO: City of Fort Collins

Lariter County Etergency Manage1ent

Poudre and Thotpson Valley Schools

ISSUED: 1530 MDT, MOHDAY, JULY 28, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLK ••• THAH!S

COHTIBUK MSNS "IRTKRBAL" FLASH FLOOD MATCH FOR KBTIRK COUHTY THROUGH MIDHIGHT

Moisture continues to strea1 into the area fro• the south. An upper level

disturbance is arriving and 1oving across the area for this evening so we

are not out of the woods as far as heavy rain and thunderstoras are concerned.

fORECAST lOR LARIMER COUHTY ••• through 1idnight: 70 percent chance of rain

and thunderstor1s.

Strongest thunderstor•s could produce 2.0 inch plus

hourly rainfall rates and saall strea1 and creek flooding along with urban

street flooding and irrigation ditch overflows.

After 1idnight: 50 percent chance of shovers and thunderstor1s with Jaxi1u1

rainfall rates of up to 1 inch per hour.

fROM: Jia Mirshborn, Mountain States Heather Services

TO: City of fort Collins

Lariaer County laergencJ Kanageaent

Pondre and Thoapson Valley Schools

ISSUKD:

1710

MDT, HOBDAY, JULY

28, 199T

DISPATCHERS PLEASE RELAY TO YOUR "01 CALL" PIOPLI ... THABlS

BMS fLASH fLOOD MATCH IS II llliCT lOB ALL

Ol

THI UBBAI CORRIDOR

COUHTIIS, IBCLUDIMG ALL

Ol

THE IASTIBB HALl

Ol

LARIMER COUBTY THROUGH

2100.

A HMS fLASH fLOOD MARBIBG IS IB llliCT lOB SOUTHWEST WILD COUBTY

TILL

1900,

IBCLUDIBG fORT LUPTOH ABD HUDSOB. II THIS RARHIBG ARIA

CLOSE TO lOUR IBCHIS

Ol

HAS lALLIB II THE LAST COUPLE Of HOURS.

DOPPLER RADAR IBDICATES

1-2

IBCH PER HOUR RAIHlALL RATES DIVILOPIHG IH

IASTIBB LARIMER COUHTY ABD DOMH THROUGH IASTIRI BOULDER COUHTY IHTO THE

DIMVIB MITRO AREA. STORM MOVIMEBT IS BORTHHORTHIAST AT OILY liVE TO

10

KPH.

lOR IASTIRB LARIMER COUHTY AID RILLIBGTOB, LAPORTE, BILLVUI, fORT COLLIHS,

TIKHATH, LOVILABD ABD BERTHOUD BE READY lOR IITIBSIVI URBAB JLOODIHG AHD

SMALL STREAM ABD CREE! lLOODIBG DURIBG THE HilT OBI TO HOURS AS THESE

STORKS HIT THE ALREADY SATURATED GROUBD ABD OYIRJLOM IRRIGATIOH DITCHES.

MIBSHBORH

HHHH

FRO!: Ji1 Hirshborn, Mountain States Heather Services

TO: City of lort Collins

Lari1er County K•ergency !anage1ent

Poudre and Tho1pson Valley Schools

ISSUED: 19(0 !DT, !OHD!Y, JULY 28, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... TH!HIS

HNS lL!SH FLOOD HATCH IS I! EFFECT

lOR

ALL OF THK ORB!! CORRIDOR

COUHTIES, IHCLUDIMG THE !!STERR

BALl

OF L!RIKER COUBTY THROUGH 2100.

HNS URB!B !BD SMALL STREAK FLOOD ADVISORY BON I!

ElFKCT

THROUGH 2100

lOR EASTERN LARIMER COUBTY, IHCLUDI!G NELLIHSTOB, BUCIEYE, lORT COLLINS,

BELLVUE, LAPORTE, LOVEL!!D, BERTHOUD, C!MPIOH, M!SOHVILLK !HD TEDS PLACE

DOPPLER RADAR INDICATES 1-2 IHCH PER HOUR R!IHF!LL RATES fro1 the foothills

to I-25. The area of heayy rain shows little IOYeJent or 1aybe a drift to

the north at fiYe to 10 1ph.

SMALL STREAK !!D CREEl FLOODIHS, URB!B STREET lLOODIHS !BD OVERFLONIHG

IRRIG!TIOH DITCHES

HILL

COBTIHUE AT LEAST THROUGH 2100.

NIRSHBOR!

-,_I

HHHH

FROM: Ji1 Nirshborn, Mountain States Weather SerTices

tO: City of.Fort Collins

Lariter County itergency !anagetent

Poudre and thoapson Valley Schools

ISSUED:

2040

!Dt, !ORDAY, JULY

28, 1997

DISPATCHERS PLEASE RELAY TO YOUR

"01

CALL" PEOPLK ... tHAH!S

!NS FLASH FLOOD WATCH IS II EFFECT FOR ALL OF !Hi URBAI CORRIDOR

COUNTIES, IBCLUDIHG THE EASTERI HALF

Ol

LARIMER COUITY THROUGH

2100.

HHS URBAH ABD S!ALL STRIA! FLOOD ADVISORY ION IB EFFECT THROUGH

2100

lOR KASTKRB LARIMER COUBTY, IBCLUDIKG WELLIHGTOB, BUCIEYE, FORT COLLIBS,

BELLVUE, LAPORTE, LOVELABD, BERTHOUD, CA!PIOB, !ASOBVILLE ABD TEDS PLACE

RADAR IBDICATIS AB I!POYIIG

%011

STARTIIG TO MOVE IB FRO! THE SOUTHWEST.

THE BACI EDGI OF THE RAil ABD THUBDERSTOR!S IITIBDS FRO! MALDEN tO PIHEWOOD

tO BRIE TO EAST DIHVER ABD THIS BAC! IDGK IS !OVIHG HORTHIASTWARD AT

10

tO

15

MPH.

DURING THE HKIT HOUR TO

90

!IHUTIS THE HEAVY RAilS IH LARIMER COUHTY

WILL KID AHD BY

2300

WATER LEVELS OB STREAKS AID StREETS SHOULD SUBSIDE.

THK RIST OF THE HIGHT HE'LL HAVE ARIAS OF

lOG,

DRIZZLE AHD A lKN LIGHT

SHONKRS BUT SHOULD BOT HAVK AMY !ORK TORRIITIAL RAIBS TILL AlTER BOOB

TUESDAY.

NIRSHBORI

. ··:·. ·= ... :_: •..

. · ..

KHHH

FROM: Jit Nirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lariter County Eaergency Manageaent

Poudre and Thoapson Valley Schools

ISSUED: 2115 MDT, MOHDAY, JULY 28, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OM CALL" PEOPLE ... THAH!S

HNS DRBAH AHD SMALL STREAM FLOOD ADVISORY IS EITEHDED THROUGH 2300

FOR EASTERN LARIMER COUNTY, IHCLUDIHG NELLIHGTOH, BUCKEYE, FORT COLLIHS,

BELLVUE, LAPORTE, MASOHVILLE AHD TEDS PLACK

DURING THE HEIT HOUR TO TNO BOORS THE HEAVY RAIRS IR LARIMER COUNTY

MILL EHD AMD MATER LEVELS OR STREAMS AHD STREETS SHOULD SUBSIDE THEREAFTER.

THE LAST 15 MIHUTES THERE BAS BKEH SOME INCREASE IH RAIH IMTEHSITY ALOHG AHD

HEAR THK FOOTHILLS. FLOODIMG CORTIHUES OR DRBAM STREETS AMD OM SOME FOOTHILLS

LOCATION ROADS.

AFTER MIDRIGBT WE'LL HAVE AREAS OF FOG, DRIZZLE AHD A FEN LIGHT

SHOWERS BOT SHOULD HOT HAVE AHY MORE TORRENTIAL RAIHS TILL AFTER HOOH

TUESDAY.

NIRSHBORH

. ·.·

...

. .

·

·.·

HHHK

FROH: Ji1 Wirshborn, Mountain States Weather Services

TO: City of fort Collins

Lari1er County K1ergency Hanage1ent

Poudre and Tho1pson Valley Schools

ISSOKD:~~MDT~~Y,

JOLY 28,

1997

~~5

DISPATCHERS PLKASK RELAY TO YOOR "OK CALL" PKOPLE ... THAKlS

KWS HAS ISSOKD A FLASH fLOOD WARHIHG fOR EASTERS LARIMER COOHTY

THROOGH MIDHIGHT.

THIS WARHIHG I!CLODES FORT COLLIBS, BKLLYOE LIVERMORD, MASOKVILLE AHD

TKDS PLACK.

. KHHH

fROM: Jia Nirshborn, Mountain States Weather Services

TO: City of fort Collins

Lariaer County Eaergency Manageaent

Pondre and Thoapson Valley Schools

ISSUED: 2300 MDT, MOBDAY, JULY 28, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... THAM!S

A HMS fLASH fLOOD NARBI!G CO!TIBUES fOR EASTERN LARIMER COUHTY

THROUGH MIDNIGHT. A fLASH fLOOD HATCH CORTIHUES fOB THE fBOHT

RAHGK, IHCLUDIBG iASTKRH LARIMER COUBTY THROUGH KIDBIGBT.

Radar indicates the storas are decreasing in coverage and rate

of fall and this trend should continue.

fOR LARIMER COUBTY •.. thunderstoras and shovers tapering to light

by aidnight vith rainfall rates of less than .25 inch per hour overnight.

Areas of fog and drizzle developing.

OUTLOO! fOB TUiSDAY ..• aore heavy rains in the afternoon and on into

the evening.

NK HAY! BAD BKASORABLi RAIBfALL KKASURKKKBTS

Ol

OVER 11 IHCBKS.PLUS SIMCK

YESTERDAY AfTERROOH IB MIST fORT COLLIBS. AT LEAST THREE LOCATIOHS

REPORT KOBE TBAH KIGHT IHCBXS, ALTHOUGH TBXSK HERE BOT STANDARD GAGES.

THK HIGHEST REPORT Of 11.20 WAS lROK BILL GKB!, (482-0158 AT 2408

POPLAR) APBOI. 1.5 MILKS WIST

Ol

THE MAIH CAMPUS

Ol

CSU. HI HAS A

4-IHCH DIAMETER GAGE

Ol

THE TYPE Hi USi IH OUR SPOTTER RKTMORI. Hi

RKCORDID THE 11.20 fROM APPROI 1600 YESTERDAY THROUGH 2230 THIS KVKHIHG.

lBOM

1800 THROUGH 2230 HI MIASUBID 8.41 IHCHKS.

MIRSHBORH

-r

5B 7S S8 80

bO

5"b

60

§7

r7JS

.t;'O

BRRR

YRO!: Jia Mirshborn, !ountain States Heather Services

tO: City of fort Collins

Lariaer County Eaergency !anageaent

Poudre and tho1pson Valley Schools

ISSUED: 0333 !Dt, TUESDAY, JULY 29, 1997

DISPATCHERS PLEASE RELAY tO YOUR "OK CALL" PEOPLE ... THABIS

LARI!ER COUBTY fORECASt ..•

tHROUGH HOOI: 1ostly cloudy vith areas of fog and lov clouds, drizzle

at tites this torning.

BOOB tHROUGH !IDBIGHT: SO percent chance of thunderstor1s, so1e locally

heavy and slov 1oving vith up to tvo inch per hour rainfall rates for the

strongest stor1s. The slov 1ove1ent and heavy rainfall rates could cause

flooding of rivers and strea1s and urban street flooding and futher stress

irrigation syste1s.

tOHIGHT: shovers and thunderstor1s ending vith areas of fog and lov

clouds reforting.

MKDHKSDAY: partly sunny and varaer vith a 40 percent chance of 1ostly

afternoon and evening thunderstorls, again a fev heavy ones vill be

possible.

AB IBTKRBAL YLASH YLOOD MATCH IS SUGGESTED YOR BOOB THROUGH !IDBIGHT.

CURBKRTLY RADAR IBDICATES OBLY A YIM SPRIKILES SCATTERED OYIR TBK COUBTY

MITH LITTLE !OVI!EHT IHDICATKD.

MIRSRBORH

FROM: Ji1 Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lari1er County E1ergency !anage1ent

Poudre and Thoapson Valley Schools

ISSUED:

0955

MDT, TUESDAY, JULY

29, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OK CALL" PEOPLE ... THAN!S

NWS FLASH FLOOD WATCH VALID FRO! BOOK THROUGH !ID!IGHT FOR EASTERS

LARIMER COUBTY, THE FRONT RA!G! AHD BEIGHBORIBG PLAIBS COUBTI!S .

.. MSHS LARIMER COU!TY FORECAST .•.

THUNDERSTORMS SHOULD FORM BY NOOH.

HOOK THROUGH MID!IGHT: 70 percent chance of thunderstor1s, so1e locally

heavy and slow loving with. up to three inch per hour rainfall rates for the

strongest stor1s. The slow tovetent and heavy rainfall rates could cause

flooding of rivers and streats and urban street flooding and further stress

irrigation systets. It 1ay only that .5 to .75 inches per hour to cause

flooding.

TONIGHT: showers and thunderstorts ending with areas of fog and low

clouds reforting. Flood intensity thunderstor1s till tidnight.

WEDNESDAY: partly sunny and war1er with a 40

percent chance of tostly

afternoon and evening thunderstorts, again a few heavy ones vill be

possible.

RADAR SHOHS A COUPLE OF LIGHT RAIBSHOWERS IB BORTHHIST LARIMER COUKTY

AHD ALSO A CELL ALOKG THE !ORGAB-HILD BORDER. THERE ARK IBDICATIOMS OF

A "DEHVER CYCLONE" TO IHHAMCI THE THUHDIRSTORMS TODAY WHICH HILL MOVE FROM

SOUTH TO HORTH OR POSSIBLLY FROM SOUTHEAST TOWARD MORTHHIST. SPIED OF.

MOVKMKHT HILL BE

10

MPH.

~ROM:

Ji1 Mirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lari1er County E1ergency Hanage1ent

Poudre and Tho1pson Valley Schools

ISSUED: 1215 MDT, TUESDAY, JULY 29, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... THAB!S

HMS FLASH fLOOD MATCH VALID fROM HOOK THROUGH HIDHIGHT FOR EASTERH

LARIMER COUHTY, THE FROHT RAHGE AHD HEIGHBORIHG PLAIHS COUHTIES.

RADAR UPDATE ... radar indicates light shovers and thunder for1ing

fro• near Estes Park to near Rustic. Rainfall rate with this

shover area is less than .1/hr.

MSMS LARIMER COUHTY FORECAST ...

THROUGH MIDHIGHT: TO percent chance of thunderstor1s, so1e locally

heavy and slow loving with up to three inch per hour rainfall rates for the

strongest stor1s. The slow JOVeJent and heavy rainfall rates could cause

flooding of rivers and strea1s and urban street flooding and further stress

irrigation syste1s. It Jay only that .5 to .75 inches per hour to cause

flooding.

TOKIGHT: showers and thunderstor1s ending with areas of fog and low

clouds refor1ing. Flood intensity thunderstor1s till 1idnight.

MEDMESDAY: partly sunny and war1er with a (0 percent chance of 1ostly

afternoon and evening thunderstorJs, again a few heavy ones will

be

possible.

FRO!: Jit Hirsbborn, Mountain States Heather Services

10: City of Fort Collins

Lariter County Etergency !anagetent

Poodre and fbotpson

Valley Schools

ISSUED:

1340

!Df,

1UESDAY, JULY 29, 1997

DISPAfCHERS

PLEASE RELAY 10 YOUR

"01

CALL" PEOPLE ... fHAHXS

INS

FLASH FLOOD HA1CH VALID FRO! BOON 1HROUGH NIDBIGH1 FOR EASfEBI

LABI!EB COUB1Y, 1HE FBON1 BANGE ABD BEIGHBOBIBG PLAINS COUNfiES.

RADAR UPDAfE ••• thunderstorts,

Bote

iith rainfall rates

of

up to

.. 1 inch per hour are noi occoring orer Hestern Lariter County iith

lillie toveaeol lod!caied. !he area baa exPaDded lo slae and loienalil

in the last

30

tinutes and extends frot near Estes Pari to

Just iest

of Virginia Dale.

HIRSHBORB

FROM: Ji1 Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lariaer County E1ergency Manageaent

Poodre and Tho1pson Valley Schools

ISSUED: 1510 MDT, TUESDAY, JOLY 29, 1997

DISPATCHERS PLEASE RELAY TO YOOR "OH CALL" PEOPLE •.• THAKIS

HHS FLASH FLOOD WATCH VALID FROM BOOB THROUGH KIDBIGBT FOR EASTERH

LARIMER COOKTY, THE FROST RAKGE ABD KEIGBBORIKG PLAIKS COOKTIES.

RADAR OPDATE ... thunderstor•s over Lari1er County have veakened

and beco1e scattered fro• the sooth of Drake to the Colo-Wyo. line

Rainfall rates are less than .1/hr. Bear Crystal Lakes radar esti1ates

about .75 in the last hour and a half bot that stor1 has di1inished.

HOWCAST •.. tboogh stor•s have died down in the last 1.5 hours the

heat and partly sonny skies will increase the activity during the

next couple of hours.

For tbe Orban Fort Collins area the greatest threat will start

around 1700.

!Ill

FRO!: Jia Nirshborn, !ountain States Weather Services

TO: City of fort Collins

Lariaer County laergency !anageaent

Poudre and Thoapson Valley Schools

ISSUID:

1630 !DT,

TUESDAY, JULY 29,

1997

DISPATCHIRS PLIASI

RELAY

fO

YOUR "OB CALL"

PIOPLI •.. fHABIS

INS !LASH fLOOD MATCH

VALID

fROM 100!

THROUGH

!IDIIGHT

lOR

IASTIRH

LARIMER COUHTY,

fBI lROHT

BABGI

AID IIIGHBORI!S PLAIIS

COUITIES.

RADAR

indicates rapidly building storas vith 1-2 inches per hour rainfall

rates froa southern Boulder County eastvard to southeast Meld County into

southern !organ County. The line is aoving northvard vhile the cells in

the· line are loving northeast 10 to 15 aph. fhis line has also produced

tornadoes around Byers.

Khile developaent so far has been very 1iaited in Lariaer County the chance ·

of heavy slov loving thunderstoras this evening can not yet be ruled out.

The flash flood vatch continues through aidnight and in the next couple of

hours storas should increase over Lariaer County and becoae heavy.

''"

I •

.. -~ . ,

HHHK

FROM: Ji1 Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lari1er County E1ergency Manage1ent

Poudre and Tho1pson Valley Schools

ISSUED: 1725 MDT, TUESDAY, JOLY 29, 1997

DISPATCHERS PLEASE RELAY TO YOOR "OM CALL" PEOPLi ... THAHIS

HMS !LASH FLOOD MATCH COMTIROiS THROUGH MID!IGHT !OR E!STKRH

LARIMER COOHTY, THE !ROHT R!KGK !MD BKIGHBORIMG PLAINS COOHTIKS.

At this 101ent only a couple of light showers are within Lari1er

County, 1oving northeast at 10 to 15 1ph.

I feel we still can not standdown on the watch. Me have heavier

thunderstor1s fro• Grand to Boulder County 1oving northeast 10 to 15.

If these would hold together and not change intensity they would

bring .25-.50 inch per hour rainfall into the eastern part of Lari1er

County by 1930-2030.

A 1ore likely develop1ent would be the stor1s in Meld County vould

push a gust front westward into the foothills with strong and heavy

thunderstor1s developing between 2000 and 2100 so we need to Jaintain

the watch for nov.

(.

OPDATKD IHFORMATIOH 28/1720 MDT

DKHRTPMSM

MOOHTAIH STATES MKATHER SERVICES

FORT COLLINS, COLORADO {OFFICE 970 .8.-9.63)

OBSERVATIONS IKDIHG APPROXIMATELY 0755, TOISDAY, JULY 29, 1997.

---LOCATIO&

COUNTY

ELKV HI LO PCPH ·8-HOUR PRECIP

---ARAPAHOE 14M

CHKYKKBK

U52 no report

BROSH 2SM

MORGA!

.231 76 63 .75

1.51

BOCIHORM MOUMTAIH 11

LARIMER

·HOO

65 52 .52

1.13

KSTKS PARI 21/2S

LARIMER

8000 65 52

.H

.17

FORT COLLINS .E {MSMS OB) LARIMER

4920

71

61 .60

1.20

GRKKLKY UMC

MELD

4715 76 61 .29

.62

HAXTON U

PHILLIPS

4028 73 59

.H

.48

FROH: Ji1

~irshborn,

Hountain States

~eather

Services

fO: City

of

fort Collins

Lari1er County E1ergency Hanage1ent

Poudre and fho1pson Valley Schools

ISSUED:

1415 HD7,

~KDNESDAY,

JULY

30, 1997

DISPATCHERS

PLEASE RELAY

70

YOUR "OB CALL" PKOPLE .•. fHABIS

BBS FLASH FLOOD BATCH

IS

IN E11KC7 lOR EAS7ERR LARIHER COUNTY AND

BKIGHBORIBG COUNTIES

fiLL

HIDBIGH7

RADAR UPDA7E ... near

stationary line

of

thunderstor1s covers the

vestern quarter

of

Lari1er County. Hhiie the line is stationary

the individual thunderstor1s are loving north at only five to

10

1ph.

In the last one and half hours radar esti1ates are around

1.00

to

1.50

inches.

fhunderstor1s vill beco1e widespread over 1ost

of

Lari1er County,

including the urban eastern sections by

1600.

As

the afternoon

Progresses the individual cells vill 1ove northeastward at five

to

10

aph and the eastern ·sections of·the county vill also co1e under

the gun.

HSHS LARIHKR COUB7Y 10RECAS7 ... there

is a 70 percent chance of

thunder-stous through lidnight.

fhe strongest storas could produce

2-3

inch per hour rainfall rates.

Already vet ground vill handle less than an inch of rain before rapid

runoff occurs.

HHHH

FROM: Ji1 Mirshborn, Mountain States Heather Services

TO: City of fort Collins

Lariter County E1ergency Manage1ent

Poudre and Tho1pson Valley Schools

ISSUED:

1445

MDT, MEDSESDAY, JULY 30,

1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... THAHXS

HMS FLASH FLOOD MARRING IH EFFECT lOR CKKTRAL LARIMER COUHTY

IHCLUDK GLKH HAVKH, PIHGRE PAR!, RKD FEATHER LAXES AHD RUSTIC

TILL

1615

HMS FLASH FLOOD MATCH IS IH EFFECT FOR EASTERS LARIMER COUHTY AKD

KKIGHBORIHG COOHTIES TILL MIDHIGHT

BBBH

fROM: Jit Hirshborn, Mountain States Heather Services

.

.

TO: City of Fort Collins

Lariter County Etergency Manageaent

Poudre and Thotpson Valley Schools

ISSUED:

1535

MDT,

HEDHESDAY, JULY 30,

1997

DISPATCHERS

PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAKIS

HHS FLASH FLOOD HARRIHG FOR "CEHTRAL LARIMER COUHTY", including

Glen Haven, Pingre Park, Red Feather Lakes and Rustic till

1615

HHS fLASH FLOOD HATCH IS IN EFFECT FOR EASTERH LARIMER COOHTY AHD

HEIGHBORIHG COUNTIES TILL MIDHIGHT

RADAR continues to shoN heavy thunderstorts fro1 the higher

foothills vestvard. The public reported

1.9

inches of rain in

30 1inutes at Cystal Lakes northwest of Red Feather earlier

this afternoon.

In the next hour or tvo soae storas vill develop in the eastern

part of the county.

.'·.: · ..

.. :

... :

,-·

..

' ~-··· .

....

. ·· ... ··-··

...

·.

HHHK

fROM: Ji1 Hirshborn, Mountain States Heather Services

TO: City of.Fort Collins

Lari1er County l1ergency Manage1ent

Poudre and fho1pson Valley Schools

ISSUED:

1620

!DT, HIDBESDAY, JULY

30, 1997

DISPATCHERS PLIASI RILAY TO YOUR "OH CALL" PIOPLI ... THAHIS

HHS fLASH fLOOD HATCH CONTIHUIS lOR LARIMER COOHTY AHD HEIGHBORIHG

COUHTIKS fiLL MIDNIGHT

BHS HAS ALLONKD THI fLASH FLOOD NARHIHG lOB CIKTRAL LARIMER COUNTY

TO KIPIRI AT

-1615.

RADAR IHDICATIS .25 TO .50 RAINFALL RATIS CONTINUING fROM THI fOOTHILLS

HKSTHABD ABD THIRK HAS BKIK A DRifT INTO PARTS OF THI IASTIRB PART Of

LARIMER COUBfY DORING THE LAST HOUR.

IH ADDITIOB SIVERE STORMS liTH HAIL AHD

2-3

IHCHIS PIR HOUR RAINFALL

RATIS ARK OVIR BOULDER COUNTY AID ARI MOVING MORfHKORTHIASTHARD AT

nn ro

10

MPH.

fBI HIIT HOUR SHOULD Sll SIGHiliCABT RAINFALL RATIS IH EASTIRB LARIMER

COUNTY, IHCLUDIHG THI URBAH ARIAS FROM BIRfHOOD/LOVILABD BORTHHARD

THROUGH fORT COLLI!S AHD HILLIBGTOH.

IIIRSBBORM

.. ··:·· ... • • • • • 0 •

HHHH

¥ROM: Ji1 Hirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lari1er County E1ergency !anage1ent

Poudre and Tho1pson Valley Schools

ISSUED:

1755

MDT, HEDHESDAY, JULY 30,

1997

DISPATCHERS PLEASE RELAY TO YOUR "OK CALL" PEOPLE ... THAH!S

HNS ¥LASH FLOOD HATCH COHTIHOES FOR LARIMER COOHTY AHD HEIGHBORIHG

COUNTIES TILL !IDHIGHT

RADAR indicates shovers and thundershowers in northwest Lari1er

County on the Lara1ie River with rainfall rates around or less than

.25 inches per hour. This syste1 is 1oving northnortheast at

10

or

15

1ph away fro1 Lari1er

Cou~ty.

Elsewhere no precipitation is detected in Lari1er County, however a

strong line of thunderstor1s is over Held County. Onless a gust

front co1es out of that stor1 and 1oves into the foothills it should

have no affect on Lariaer County. If the gust front does reach Lari1er County

can rapid thunderstor1 develop1ent could occur in the eastern part of

the county renewing the threat of heavy rain.

Nhile the flash flood watch continues for Lari1er County through 1idnight

the threat for heavy rain is nov reduced.

He will continue to 1onitor but unless significant develop1ent occurs

this will be the last state1ent of the evening, As alvays ..• call 1e on

the unlisted nu1ber if you need 1e.

NIRSHBORH

. . : . . .

HHHH

FROM: Jia Hirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lariaer County Eaergency Manageaent

Poudre and Thoapson Valley Schools

ISSUED: 2025 MDT, HEDHESDAY, JULY 30, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAHXS

HNS FLASH FLOOD HATCH COHTIHDES FOR LARIMER COOHTY AHD HEIGHBORIHG

COOHTIXS TILL MIDNIGHT

MODERATE TO HEAVY RAIH IS AGAIH MOVIHG IHTO SOOTHERH LARIMER COOHTY

AHD HAS BEEH PERSISTING OVER HESTEBH SECTIONS OF THE CODHTY DORIHG

THE LAST BOOR.

THOHDIRSTORMS HITH 1.0 IHCH PER BOOR RAINFALL RATES HILL OCCUR

OVER MOST OF THE CODBTY DDRIBG THE HEIT OHE TO THO BOORS. THESE

STORMS ARK CAPABLE OF PRODDCIHG RAPID ROHOFF AHD STREET FLOODING

THROUGH 2200.

NIRSHBORH

*

DIHFFSDEH

TTAAOO XDEH 310230

KKKH

FROM: Jia Hitshborn, Mountain States Heather Services

TO: City of Fort Collins

~ariaer

County Eaergency Manageaent

Poudre and Thoapson Valley Schools

ISSUED: 2145 MDT, HEDKESDAY,

JU~Y

30, 1997

DISPATCHERS PLEASE RELAY TO YOOR "OH CALL" PEOPLE ... THAKKS

KHS

F~ASH FLOOD HATCH CONTINUES FOR LARIMER COUNTY AND NEIGHBORING

COUNTIES THROUGH MIDNIGHT

The area of rain and a few thunderstorts over

~ariaer

County is

decreasing in size and intensity. Off and on tostly light rain

with a few aoderate thundershowers will persist till tidnight.

The rainfall rates should retain gnerally under .25 inches per hour.

He

will continue to tonitor the radar but this will be the last

update unless conditions warrant.

FROM: Ji1 Wirshborn, Mountain States Weather Services

TO: City of Fort Collins

Lari1er County E1ergency Manage1ent

Poudre and Thoapson Valley Schools

ISSUED: 0430 MDT, THURSDAY, JULY 31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "ON CALL" PEOPLE ... THAHXS

Another blob of aoisture is coaing

north~ard

into Colorado for

this afternoon and tonight. A little

~araer

te1peratures

~ill

add energy to the thunderstor• production and

slo~

1ove1ent of

stor1s vill again cause heavy localized rains late today and

tonight.

The trajectory of the 1oisture 1ay take the heaviest activity

a little farther east than Lari1er County, but even so, vith

te1peratures reaching the

lo~

to 1id-80s, high

de~

points and

the upper level disturbance·co•ing up fro• the south that should

still give the at1osphere the possibility of producing so1e

big rainstor1s in the vicinity.

After the

ne~

1aps co1e in this 1orning

~e

1ay issue an "internal"

flash.flood vatch.

MSWS LARIMER COUHTY FORECAST .•.

Increasing clouds late this 1orning

~ith

a chance of thunderstor1s

developing over the 1ountains early this afternoon and into the

lover elevations by 1400-1500. Thunderstor1s ending 2200.

Kaxi1u1 rainfall rates of the vorst stor1s could be ·1-2 inches per

hour, again causing flooding of already saturated ground conditions.

Cell 1ove1ent

~ill

be north to south 10 1ph in the early afternoon

and tovard the northeast during the evening at 10 to 15 1ph.

WIRSHBORH

HHHH

FROM: Ji1 Mirshborn, Mountain States Weather Services

tO: City of Fort Collins

Lariter County E1ergency Managetent

Poudre and thoapson Valley Schools

ISSUED:

1205

MDT, THURSDAY, JULY

31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... THAH!S

HMS FLASH FLOOD MATCH THROUGH MIDHIGHT

FOR EASTERH LARIMER COUHTY

(and the urban corridor, the aetro area and northeast Colorado

MSMS LARIMER COURTY FORECAST •••

Thunderstoras developing now over the western part of the county will

develop in the eastern sections between

1330

and

1430.

Maxiaua rainfall rates of the worst storas could be

1-2

inches per

hour, again causing flooding of already saturated ground conditions.

Cell toveaent will be north to south

10

1ph in the early afternoon

and toward the northeast during the evening at

10

to

15

1ph.

MIRSHBORH

.

.

FROM: Ji1 Mirshborn, Mountain States Heather Services

TO: City of fort Collins

Lariaer County E1ergency Hanage1ent

Poudre and Tho1pson Valley Schools

ISSUED: 1250 MDT, THURSDAY, JULY 31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PEOPLE ... THARKS

HMS fLASH fLOOD MATCH THROUGH MIDHIGHT fOR EASTERR LARIMER COUHTY

IHCLUDIHG:

(th~

urban corridor counties, the 1etro area and northeast Colorado counties)

IH LARIMER COURTY AREAS EAST Of THE 9500 fOOT ELEVATIOH

RADAR CURREHTLY SHOMS ... shovers and thunderstor•s over the vestern

third of the county vith little 1oveaent and 1ostly .25 inch per hour

or less rainfall rates.

MSMS LARIMER COUHTY fORECAST ••.

Haxi•u• rainfall rates of the vorst stor1s could be 1-2 inches per

hour causing flash flooding in the vatch area.

Cell 1oveaent vill be south to to north 10 aph in the early afternoon

and tovard the northeast during the evening at.10 to 15 1ph. (ROTE

CORRECTED "early" 1oveaent.)

MIRSHBORH

'

:

I

FROH: Ji1 Hirshborn,

~ountain

ptates Heather Services

TO: City of Fort Collins

Lari1er County E•ergency Hanage1ent

Poudre and Thompson Valley Schools

ISSUED:

1415

HDT, THURSDAY, JULY

31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "ON CALL" PEOPLE ... THAN[S

HHS FLASH FLOOD HATCH THROUGH MIDNIGHT FOR EASTERN LARIHKR COUNTY

INCLUDING:

(the urban corridor counties, the 1etro area and northeast Colorado counties)

IN LARIMER COUNTY AREAS EAST OF THE

9500

FOOT ELEVATION

Radar shovs .25 to .5 inch per hour rainfall rates fro1 Estes Park and

Drake northvard to just east of Rustic northvard to northcentral Lari1er

County. The eastern edge of lighter precipitation associated vith this

area extends east to the Lariler-Held border. About

10

1iles south of

Rustic there is a s1all area that has had

1.4

inches of rain in the last

three hours according to radar. There is little 1ove1ent indicated on

the precipitation area.

HSHS LARIMER COUNTY FORECAST .••

Haxi1u1 rainfall rates of the vorst stor1s could be

1-2

inches per

hour causing flash flooding in the vatch area.

Cell 1ove1ent vill be south to to north

10

1ph in the early afternoon

and tovard the northeast during the evening at

10

to

15

1ph. (NOTE

CORRECTED ·early" 1ove1ent.)

HMHH

FROM: Ji1 Mirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lari1er County Eaergency Manage1ent

Poudre and Thompson Valley Schools

ISSUED: 1515 MDT, THURSDAY, JULY 31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAMlS

KHS FLASH FLOOD HATCH THROUGH MIDNIGHT fOR EASTERN LARIMER COUNTY

INCLUDING:

(the urban corridor counties, the 1etro area and northeast Colorado counties)

IH LARIHER·COUHTY AREAS EAST OF THE 9500 FOOT ELEVATION

Light to occasionally 1oderate shoiers and a fei thunderstor1s ·are over

eastern Lari1er County and loving northeastward at 10 or 15 1ph.

For the next two hours expect rainfall rates up to .25 to .35 inches

per hour and 1aintain the flash flood iatch.

A gusty iest wind has kicked in as these showers have 1oved into

eastern Lari1er County and this 1ay end up providing enough local

drying that we 1ay not get the torrential rains. It is too early to

be certain.

HMMM

FROM: Ji1 Hirshborn, Mountain States Heather Services

TO: City of Fort Collins

Lari1er County E1ergency Manage1ent

Poudre and Tho1pson Valley Schools

ISSUED: 1720 MDT, THURSDAY, JULY 31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OH CALL" PEOPLE ... THAM!S

HHS

FLASH FLOOD

HATCH THROUGH

MIDNIGHT FOR EASTERN LARIMER COUNTY

IHCLUDIHG:

(the urban corridor counties, the 1etro area and northeast Colorado counties)

IH

LARIMER

COUHTY

AREAS EAST Of

THE

9500 FOOT ELEVATION

Current radar and spotter reports indicate all precipitation rates

~ithin

Lari1er County are less than .25 inches per hour.

Hhile

de~

points had dropped into the upper 40s and

lo~

50s a couple of

hours ago

~hen

the

~inds

kicked in fro1 the

~est

... the

de~

points are.

back into the aid-50s. Co1pared to farther south and east these nu1bers

are

lo~

and not as favorable for heavy rain.

THE

HHS

fLASH FLOOD HATCH·COHTIHUES •..

THE

MSHS

UPDATED

FORECAST CALLS fOR ...

sho~ers

and a

fe~

thunderstor1s

~ith

rainfall rates generally .25 inches or less till 2100 then mostly

cloudy through 0200

~ith partial clearing overnight.

FOR FRIDAY: partly cloudy. A 30 percent chance of thunderstor1s fro•

1400 through 1900 Rith •axilut rainfall rates of .25/hr.

FROM: Jia Hirshborn, Mountain States Heather Services

TO: City of fort Collins

Lariaer County Etergency Manageaent

Poadre and Thoapson Valley Schools

ISSUED: 1820 MDT, THURSDAY, JULY 31, 1997

DISPATCHERS PLEASE RELAY TO YOUR "OR CALL" PKOPLE ... THAH!S

SPOKE WITH THE LEAD FORECASTER AT NHS DEHVER ... he Rill drop the

flash flood Ratch as soon as he can get it on the Rire bat it

tay be a Rhile since he is putting out flash flood Rarnings for

other areas of HE Colorado.

THE MSHS FORECAST CALLS FOR ... shoRers and a feR thunderstorts

Rith rainfall rates generally .25 inches or less ending by 2100

then variable clouds the rest of the night, a little fog around daRn.

FOR FRIDAY: partly cloudy. A 30 percent·chance of thanderstoras fro•

1400 through 1900 Rith aaxiaua rainfall rates of .25/hr.

THIS HILL BE THE LAST STATEMENT OF THE EVKHIHG UHLESS CONDITIONS BECOME

THREATKHIHG AGAIH.

FROH: Jim Hirshborn, Mountain States Heather Services

TO: City of fort Collins

Lari1er County K1ergency Hanage1ent

Poudre and Tho1pson Valley Schools

ISSUKD: 0555 MDT, fRIDAY, AUGUST 1, 1997

HSHS LARIMER COUNTY fORKCAST ... fair this 1orning, partly cloudy

this afternoon and evening

~hen

there

~ill

be a 30 percent chance

of thunderstorms in the area.

Thunderstor1s

~ill

1ove fro•

south~est

to northeast at 15 1ph

~ith

1axiau• rainfall rates of up to

1

inch per hour but 1ostly only .25

inch per hour rainfall rates. Pri1e ti1e

~ill

be fro• 1400 through

1900.

Hill be return to a more nor1al forecast support 1ode after today

unless you let me

kno~ other~ise.

f\INNN

FROH: Jim Wirshborn, Mountain States Heather Services

TO: City of Fort Collins

Larher County Kllergency Hanageaent

Poudre and Thoapson Valley Schools

ISSUED: 0918

HDT~, AUGUST 2, 1997

HKAVY OUTLOOK ..•

Heavy

slo~

moving thunderstor1s are expected in the area this afternoon

and tonight. All interests should keep posted to radar and

~eather

updates this afternoon as

~atches

and

~arnings

1ay be necessary.

HSWS LARIMER COUNTY FORECAST ... fair this 1orning, partly cloudy

this afternoon and evening

~hen

there

~ill

be a 40 percent chance

of thunderstorms in the area.

Thnnderstor1s

~ill

move from

south~est

to northeast at 10-15 1ph

~ith

1axi1U1 rainfall rates of up to 2 inch per hour. Pri1e tile

~ill

be

from 1400 through 1900.

LARIMER COUNTY DISPATCH ... please have your "on call" person call me at

484-9~63.

FORT COLLINS DISPATCH ... please have your "on call" person call me at

484-9463.