Flash Flood Warning 18, NWS Grand Junction, CO

000 
RWUS32 KGJT 102049
FFSGJT
COC067-102215-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
249 PM MDT SUN AUG 10 2003

...FLASH FLOOD WARNING CONTINUES FOR NORTHERN LA PLATA COUNTY
INCLUDING THE MISSIONARY RIDGE BURN AREA UNTIL 415 PM MDT...

SHOWERS AND THUNDERSTORMS CONTINUED TO MOVE SLOWLY SOUTH ACROSS THE
MISSIONARY RIDGE BURN AREA AND MUCH OF THE REMAINDER OF NORTHERN LA
PLATA COUNTY. HEAVIER RAINS EARLIER THIS AFTERNOON RESULTED IN SOME
FLOODING ACROSS COUNTY ROAD 243 SOUTH OF LEMON RESERVOIR.

THE POTENTIAL FOR FLASH FLOODING REMAINS AS SHOWERS CONTINUE TO MOVE
ACROSS THE HIGHER TERRAIN IN AND NORTH OF THE MISSIONARY RIDGE BURN
AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY.
MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

$$

NL

000 
RWUS32 KGJT 102228
FFSGJT
COC067-102245-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
429 PM MDT SUN AUG 10 2003


...FLASH FLOOD WARNING FOR NORTHERN LA PLATA COUNTY ALLOWED TO
EXPIRE...

RAIN HAS DIMINISHED ACROSS NORTHERN LA PLATA COUNTY INCLUDING
THE MISSIONARY RIDGE BURN AREA. ALTHOUGH ADDITIONAL SHOWERS ARE
POSSIBLE...HEAVY RAIN IS NO LONGER EXPECTED. THEREFORE...THE
FLASH FLOOD WARNING WHICH WAS IN EFFECT HAS BEEN ALLOWED TO
EXPIRE.

$$

WESTERN COLORADO & EASTERN UTAH AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
336 AM MDT SUN AUG 10 2003

SHORT-TERM DISCUSSION (TODAY-MONDAY)...PERSISTENCE FORECAST ON TAP
THROUGH MONDAY AS LITTLE CHANGE NOTED IN DAY TO DAY MODEL RUNS.
SUBTROPICAL MOISTURE WL CONT TO WORK N INTO THE FORECAST AREA AS
HIGH PRESSURE REMAINS ANCHORED OVER THE SRN ROCKIES. DIURNAL
CONVECTION WILL FIRE OVER THE MTNS...THEN DRIFT OFF INTO THE
VALLEYS EACH AFTERNOON AND EVENING.  WL MAINTAIN VERY LOW POPS INTO
THE OVERNIGHT HOURS WITH THREAT OF NOCTURNAL CONVECTION BEING AIDED
BY WEAK WAVES IN THE FLOW.  CONTINUED HOT ACROSS THE REGION WITH H7
TEMPS HOLDING AROUND THE +18 C MARK THROUGH MONDAY.  JDC

TUESDAY-THURSDAY...FOUR-CORNERS UPPER HIGH BECOMES SW-NE ORIENTED AS
THE EASTERN PACIFIC LOW APPROACHES THE WASHINGTON COAST. THIS FORCES
THE SUBTROPICAL MOISTURE FETCH WEST AND THINS IT FOR A LOW-GRADE
MONSOON PERIOD. WILL TRY TO ADD SOME QUALITY WITH THESE DETAILS:
TUESDAY...A DRY SLOT WORKS INTO FAR SW CO FOR LESS POPS THERE. FOR
WEDNESDAY-THURSDAY...A DISTURBANCE ALSO WORKS INTO THE PLAINS FROM
THE EAST FURTHER WEAKENING THE UPPER HIGH. THIS DISTURBANCE LOOKS TO
BE A TUTT WITH NON-TROPICAL ORIGINS...SO ITS CONVECTION WOULD BE
CENTERED IN ITS CORE. AND THAT CORE IS FAR SE OF THIS CWA...SO WILL
NOT INCREASE POPS FOR THESE PERIODS. OTHERWISE TEMPERATURES SHOULD
SHOW A SLOW DECREASE. RAMEY

FRIDAY-SUNDAY...
MODELS CONTINUE TO BRING A TROF ACROSS THE NORTHWEST UNITED STATES
ON FRIDAY AND SATURDAY. MAIN IMPACT OVER CWA WILL BE DRIER SOUTHWEST
FLOW THROUGH THE EXTENDED PERIOD. HAVE KEPT CHANCE OF SHOWERS OVER
SAN JUAN MOUNTAINS ON FRIDAY DUE TO RESIDUAL MOISTURE...WITH
DECREASING POPS ACROSS THE AREA FOR THE WEEKEND. TROF IS EXPECTED TO
MOVE EAST OF THE CWA ON SUNDAY WHICH WILL ALLOW THE RIDGE TO BUILD
OVER THE INTERMOUNTAIN WEST BY EARLY NEXT WEEK. MPM

.GJT...NONE.

COZ001>014-017>023-UTZ022>025-027>029-111145-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
545 AM MDT SUN AUG 10 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN COLORADO AND FOR
EASTERN UTAH

.DAY ONE...TODAY AND TONIGHT...

SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS OF WESTERN
COLORADO AND EASTERN UTAH BY EARLY THIS AFTERNOON AND CONTINUE
THROUGH THIS EVENING. ISOLATED THUNDERSTORMS WILL OCCUR OVER THE
LOWER ELEVATIONS LATE THIS AFTERNOON AND EVENING. LOCALLY HEAVY RAIN
CAN BE EXPECTED WITH A FEW OF THE STRONGER THUNDERSTORMS LATER THIS
AFTERNOON...ESPECIALLY OVER SOUTHEAST UTAH AND SOUTHWEST COLORADO.
THE HEAVY RAIN MAY CAUSE SUDDEN WATER RISES IN NORMALLY DRY CREEKS...
SMALL STREAMS AND ARROYOS. STREET FLOODING...ALONG WITH MUD FLOWS AND
ROCK SLIDES...ARE POSSIBLE...ESPECIALLY IN AREAS THAT HAVE BEEN
BURNED BY WILDFIRES. IN ADDITION...GUSTY WINDS TO NEAR 40 MPH...CLOUD
TO GROUND LIGHTNING AND HAIL UP TO 1/2 INCH DIAMETER WILL ACCOMPANY
THE STRONGEST STORMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SCATTERED THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON AND
EVENING...ESPECIALLY OVER THE MOUNTAINS. THE MAIN THREATS FROM THESE
STORMS WILL BE HEAVY RAIN...CLOUD TO GROUND LIGHTNING...WIND GUSTS TO
40 MPH...AND SMALL HAIL.

.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS WILL NOT BE NEEDED TODAY OR TONIGHT. HOWEVER...
SPOTTERS ARE ENCOURAGED TO PHONE IN REPORTS OF STRONG WINDS...HAIL
AND HEAVY RAINFALL.

COLTON