Flash Flood Warning 28, NWS Salt Lake City, UT

000 
WGUS75 KSLC 090045
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
642 PM MDT MON AUG 8 2005

UTC053-090345-
WASHINGTON UT-
642 PM MDT MON AUG 8 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 945 PM MDT FOR EAST CENTRAL 
WASHINGTON COUNTY...

HEAVY RAINFALL OVER NORTHWEST KANE COUNTY LATE THIS AFTERNOON WILL 
RUNOFF THROUGH THE THE NORTH FORK OF THE VIRGIN RIVER THROUGH THE 
ZION NATIONAL PARK NARROWS THIS EVENING.  FLASH FLOODING HAS LIKELY 
BEGUN ACROSS THE NORTH END OF THE PARK EARLY THIS EVENING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 3720 11306 3723 11291 3743 11290 3742 11303

$$

000 
WGUS75 KSLC 090345
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
945 PM MDT MON AUG 8 2005

UTC053-090400-
WASHINGTON UT-
945 PM MDT MON AUG 8 2005

...A FLASH FLOOD WARNING FOR EAST CENTRAL WASHINGTON COUNTY EXPIRES 
AT 945 PM...

THE FLASH FLOOD WARNING FOR ZION NATIONAL PARK IN EAST CENTRAL 
WASHINGTON COUNTY EXPIRED AT 945 PM MDT. RUNOFF FROM EARLIER HEAVY 
RAINFALL IN THE UPPER REACHES OF THE NORTH FORK OF THE VIRGIN RIVER 
DOES NOT APPEAR TO BE CREATING ANY FLASH FLOODING.  HIGH FLOWS ARE 
STILL EXPECTED...BUT THE THREAT OF FLOODING APPEARS TO HAVE PASSED.

LAT...LON 3720 11306 3723 11291 3743 11290 3742 11303

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
415 PM MDT MON AUG 8 2005

.SYNOPSIS...HIGH PRESSURE ALOFT WILL REMAIN ACROSS THE GREAT BASIN
THROUGH THE MIDDLE OF THE WEEK. THE AIRMASS WILL BE DRIER OVER
NORTHERN UTAH TOMORROW...BUT MOISTURE REMAINS OVER THE SOUTH.

&&

.DISCUSSION...CONVECTION FIRING UP THIS AFTERNOON ACROSS SOUTHERN
AND CENTRAL UTAH AS EXPECTED. ALTHOUGH THESE CELLS ARE PRODUCING
LOCALLY HEAVY RAIN AND ARE SLOW MOVING...THEY HAVE THUS FAR MANAGED
TO STAY MOSTLY OVER THE RIDGETOPS AND AWAY FROM THE MOST FLASH FLOOD
PRONE AREAS. A SHORTWAVE TROUGH MOVING ACROSS IDAHO HAS HELPED GET
CONVECTION GOING OVER THE NORTHERN MOUNTAINS...BUT IT LOOKS LIKE THE
TROUGH AXIS IS IN THE PROCESS OF MOVING ACROSS THE CWA THIS
AFTERNOON. EXCEPT FOR A FEW CELLS OVER NORTHEAST NEVADA...CONVECTION
IS MOSTLY BEING SUPPRESSED UPSTREAM OF THE CWA. HAVE KEPT ONLY LOW
POPS FOR MOST OF NORTHWEST UTAH FOR THIS EVENING...ALTHOUGH HAVE
KEPT HIGHER POPS FOR THE SALT LAKE VALLEY FOR CELLS POSSIBLY
DEVELOPING OVER THE OQUIRRHS AND DRIFTING OVER THE AREA.

TOMORROW SHOULD BE MORE QUIET OVER THE NORTH AS A DRIER AND MORE
STABLE AIRMASS MOVES INTO THE AREA IN NORTHWEST FLOW IN THE WAKE OF
THE TROUGH. AMPLE MOISTURE WILL REMAIN OVER THE SOUTH HOWEVER. ON
WEDNESDAY A WEAK DISTURBANCE BRINGS A JET STREAK OVER UTAH.
THE GFS HAS IT AT NEARLY 50KT AT 300MB...ALTHOUGH THE NAM IS A BIT
WEAKER. THERE ARE STILL SOME SLIGHT DIFFERENCES BETWEEN MODEL RUNS
HOWEVER. THE 12Z NAM HAD THE MAIN JET ARCING OVER CENTRAL IDAHO WITH
JUST A JET STREAK OVER NORTHERN UTAH. HOWEVER...THE 18Z RUN NOW HAS
THE MAIN JET CLOSER THE THE UTAH/IDAHO BORDER WITH A CORE OF GREATER
THAN 70KT WINDS OVER SOUTHEAST IDAHO. THE JET STREAK STILL EXISTS
OVER THE CWA...ALTHOUGH IT HAS BEEN PLACED FARTHER SOUTH...NOW OVER
CENTRAL UTAH. MOISTURE IS ALSO PROGGED TO INCREASE OVER NORTHERN
UTAH AGAIN BY WEDNESDAY...SO THIS IN CONJUNCTION WITH THE JET
DYNAMICS COULD POSSIBLY LEAD TO AN ACTIVE WEATHER DAY. THE AIRMASS
REMAINS GENERALLY MOIST AND UNSTABLE AGAIN ON THURSDAY BEFORE A
MODERATE WESTERLY FLOW DEVELOPS OVER NORTHERN UTAH. THE AIRMASS WILL
GRADUALLY DRY FROM THE NORTH FRIDAY THROUGH THE WEEKEND. LOOKS LIKE
MOISTURE RETURNS TO THE AREA FOR THE EARLY PART OF NEXT WEEK.

&&

.FIRE WEATHER...ISOLATED TO WIDELY SCATTERED THUNDERSTORMS ARE STILL
EXPECTED OVER NORTHWEST AND WEST CENTRAL UTAH THIS EVENING. THE BULK
OF THESE WILL PROBABLY OCCUR SOUTH AND EAST OF A SALT LAKE CITY TO
DELTA LINE. THE STORMS WILL NOT BE ALL THAT DRY...BUT FINE FUELS ARE
AT CRITICAL LEVELS SO ANY LIGHTNING AWAY FROM THE SMALL RAIN SHAFTS
COULD BRING FIRE STARTS. HAVE ISSUED A RED FLAG WARNING VALID UNTIL
10 PM LOCAL TIME FOR THIS THREAT.

&&

.AVIATION...NONE. SEE SLCTAFSLC.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...RED FLAG WARNING FOR DRY LIGHTNING MONDAY AFTERNOON AND
     EVENING FIRE ZONES 420 AND 434.
WY...NONE.

&&

PUBLIC...CHENG
FIRE...WILENSKY

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
700 AM MDT MON AUG 8 2005

UTZ001>021-WYZ021-091300-
CACHE VALLEY/UTAH PORTION-CASTLE COUNTRY-
CENTRAL AND SOUTHWEST MOUNTAINS-
GLEN CANYON RECREATION AREA/LAKE POWELL-
GREAT SALT LAKE DESERT AND MOUNTAINS-HENRY MOUNTAINS-
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-SOUTH CENTRAL UTAH-SOUTHERN WASATCH FRONT-
SOUTHWEST UTAH-SOUTHWEST WYOMING-UTAHS DIXIE AND ZION NATIONAL PARK-
WASATCH MOUNTAIN VALLEYS-WASATCH MOUNTAINS I-80 NORTH-
WASATCH MOUNTAINS SOUTH OF I-80-WASATCH PLATEAU/BOOK CLIFFS-
WEST CENTRAL UTAH-WESTERN UINTA BASIN-WESTERN UINTA MOUNTAINS-
700 AM MDT MON AUG 8 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS
OF UTAH AND EXTREME SOUTHWEST WYOMING.

.DAY ONE... TODAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS UTAH TODAY.
OVER THE WEST-CENTRAL AND NORTHWEST UTAH DESERTS THESE STORMS WILL
PRODUCE LITTLE RAINFALL AND STRONG MICROBURST WINDS. A FIRE WEATHER
WATCH HAS BEEN ISSUED FOR THE POTENTIAL OF DRY LIGHTNING COMBINED
WITH THE LOCAL STRONG WINDS. IN FAR SOUTHERN UTAH...HEAVY RAIN IS
POSSIBLE NEAR SLOW MOVING THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL REMAIN ACROSS MOST OF UTAH
THROUGH THE WORK WEEK.

SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.