Flash Flood Warning 27, NWS Salt Lake City, UT

836 
WGUS75 KSLC 032124
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
324 PM MDT TUE AUG 3 2010

UTC015-041-055-032315-
/O.CON.KSLC.FF.W.0027.000000T0000Z-100803T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-EMERY UT-SEVIER UT-
324 PM MDT TUE AUG 3 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MDT FOR
SOUTHEASTERN SEVIER...SOUTHWESTERN EMERY AND NORTH CENTRAL WAYNE
COUNTIES...

AT 318 PM MDT...THUNDERSTORM ACTIVITY OVER THE NORTHERN SECTION OF 
CAPITOL REEF NATIONAL PARK CONTINUES AS OF 320 PM.  IT IS 
ANTICIPATED THAT CURRENT AND PREVIOUS RAINFALL HAS CAUSED A FLASH 
FLOOD IN THE AREA...AND IT IS MOVING THROUGH THE PARK AT THIS TIME.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3873 11143 3861 11108 3851 11105 3846 11105
      3839 11114 3850 11145 3866 11154

$$

MCINERNEY

650 
WGUS75 KSLC 032312
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
512 PM MDT TUE AUG 3 2010

UTC015-041-055-032318-
/O.EXP.KSLC.FF.W.0027.000000T0000Z-100803T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-EMERY UT-SEVIER UT-
512 PM MDT TUE AUG 3 2010

...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MDT FOR SOUTHEASTERN
SEVIER...SOUTHWESTERN EMERY AND NORTH CENTRAL WAYNE COUNTIES...

THUNDERSTORM ACTIVITY OVER THE NORTHERN END OF CAPITOL REEF NATIONAL 
PARK HAS DIMINISHED SINCE 4 PM.  AS A RESULT...IT IS ANTICIPATED 
THAT THE FLASH FLOOD THREAT IN THE AREA HAS PASSED...AND THE FLASH 
FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 3873 11143 3861 11108 3851 11105 3846 11105
      3839 11114 3850 11145 3866 11154

$$

MCINERNEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1004 AM MDT TUE AUG 3 2010

.SYNOPSIS...DEEP MOISTURE WILL REMAIN ACROSS EASTERN UTAH THROUGH
MIDWEEK. A DRIER AIRMASS WILL MOVE INTO WESTERN AND NORTHERN UTAH
THIS AFTERNOON. HIGH PRESSURE WILL SHIFT WEST THURSDAY...BRINGING
DEEP MOISTURE INTO NORTHERN UTAH LATER THIS WEEK.

&&

.DISCUSSION...DEEP MOISTURE WILL REMAIN ACROSS SOUTHEASTERN UTAH
THIS AFTERNOON AND EVENING. BLENDED TPW VALUES ARE NEAR 1 INCH IN
THIS AREA...WITH VALUES NEAR 0.80-0.90 INCHES ACROSS THE WASATCH
FRONT. SPC SREF INDICATES A HIGH PROBABILITY OF MLCAPE GREATER
THAN 500 J/KG ACROSS NORTHERN UTAH THIS AFTERNOON WITH A HIGH
PROBABILITY OF GREATER THAN 1000 J/KG OF MLCAPE ACROSS THE SOUTH.
DCAPE IS ALSO EXPECTED TO BE SUFFICIENT FOR A SIGNIFICANT THREAT
OF MICROBURST WINDS ACROSS THE FRINGES OF THE DEEP
MOISTURE...ESPECIALLY ACROSS THE WASATCH FRONT. UPDATED THE
FORECAST TO INCLUDE A THREAT OF THUNDERSTORMS WITH GUSTY WINDS
ACROSS THE WASATCH FRONT AND ADDED GUSTY WORDING TO THE
THUNDERSTORMS ACROSS THE PERIPHERY OF THE MOISTURE AXIS.

CURRENT SPC MESOANALYSIS INDICATES AROUND 100-200 J/KG OF MLCIN
ACROSS THE SOUTHEAST. THIS SHOULD HOLD OFF CONVECTIVE DEVELOPMENT
TO EARLY THIS AFTERNOON AND ALLOW FOR A FEW HOURS OF SURFACE
HEATING IN LOCATIONS THAT ARE ABLE TO CLEAR OUT ACROSS THE
SOUTHEAST. STORM MOTIONS ARE EXPECTED TO REMAIN NEAR 10 KTS THIS
AFTERNOON...BUT TRAINING ESPECIALLY ALONG TERRAIN WILL BE
POSSIBLE.  WITH HIGH LEVELS OF DEEP MOISTURE...RELATIVELY HIGH
INSTABILITY AND SOMEWHAT LIMITED STORM MOTION...FLASH FLOODING IS
A MAJOR CONCERN ACROSS SOUTHEASTERN UTAH THIS AFTERNOON AND
EVENING. A FLASH FLOOD WATCH IS IN EFFECT FOR THIS AREA.

&&

.AVIATION...THERE IS A 20 PERCENT CHANCE THAT THE SLC TERMINAL WILL
BE IMPACTED BY THUNDERSTORMS THIS AFTERNOON...WITH GUSTY ERRATIC
WINDS BEING THE MOST LIKELY IMPACT. OTHERWISE...SURFACE WINDS ARE
EXPECTED TO SWITCH TO THE NORTHWEST BETWEEN 18Z AND 20Z TODAY...WITH
A SLIGHT CHANCE THAT WINDS REMAIN SOUTHERLY THROUGH 21Z.

&&

.FIRE WEATHER...A WEAK DISTURBANCE MOVED ACROSS THE NORTHERN THIRD
OF THE AREA OVERNIGHT WITH A DRIER AIR MASS FOLLOWING IN ITS WAKE.
THIS WILL HELP TO MAKE THUNDERSTORM ACTIVITY MORE ISOLATED IN THE
NORTH TODAY...BUT ANY STORMS THAT FORM WILL LIKELY PRODUCE GUSTY
WINDS. FARTHER SOUTH AND EAST THOUGH THE STORY REMAINS THE SAME WITH
ABUNDANT MOISTURE AVAILABLE FOR SCATTERED THUNDERSTORMS TO PRODUCE
LOCALLY HEAVY RAIN. THE RELATIVE HUMIDITY WILL REMAIN HIGH THERE
TODAY THROUGH FRIDAY BEFORE ANY SIGNS OF DRYING FINALLY SETTLES IN.

MOISTURE WILL RETURN TO THE NORTH ON THURSDAY AND FRIDAY AHEAD OF A
ELONGATING TROUGH ALONG THE CALIFORNIA COAST...BRINGING A CHANCE OF
THUNDERSTORMS BACK TO THE ENTIRE AREA. WHILE CONFIDENCE IS STILL
FAIRLY LOW PAST FRIDAY...THERE IS A CHANCE THAT SIGNIFICANT DRYING
COULD OCCUR HEADING INTO THE BEGINNING OF THE NEXT WORK WEEK AS
SOUTHWESTERLY FLOW INCREASES ACROSS THE GREAT BASIN.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH THROUGH THIS EVENING FOR UTZ012-013-020-021.

WY...NONE.
&&

PUBLIC...KRUSE
FIRE WEATHER...SCHOENING
AVIATION...SCHOENING

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
349 AM MDT TUE AUG 3 2010

UTZ001>016-019>021-517-518-WYZ021-041200-
CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT-
SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT-
GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS-
WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS-
SOUTHERN MOUNTAINS-SOUTHWEST WYOMING-
349 AM MDT TUE AUG 3 2010

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

.DAY ONE...TODAY AND TONIGHT

A VERY MOIST AIRMASS WILL REMAIN IN PLACE ACROSS EAST CENTRAL AND
SOUTHEAST UTAH TODAY AND TONIGHT. SCATTERED THUNDERSTORMS ARE
EXPECTED TO DEVELOP ACROSS THIS AREA TODAY. THESE STORMS WILL BE
SLOW MOVING AND CAPABLE OF PRODUCING VERY HEAVY WHICH MAY RESULT
IN FLASH FLOODING. SLOT CANYONS...SMALL STREAMS..AND NORMALLY DRY
WASHES MAY BE PARTICULARLY HAZARDOUS LOCATIONS TODAY. STORMS WILL
BE MORE ISOLATED ACROSS WESTERN AND NORTHERN UTAH. HOWEVER...SOME
OF THESE STORMS COULD PRODUCE WIND GUSTS IN EXCESS OF 50 MPH AND
SMALL HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MOISTURE IS FORECAST TO SPREAD NORTH ACROSS THE STATE WEDNESDAY
INTO THURSDAY NIGHT...INCREASING THE THREAT FOR HEAVY RAINFALL
ACROSS THE REGION.

A DRIER AIRMASS IS EXPECTED FRIDAY THROUGH NEXT WEEKEND.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ROGOWSKI

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)