Flash Flood Warning 14, NWS Salt Lake City, UT

152 
WGUS75 KSLC 292337
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
537 PM MDT THU JUL 29 2010

UTC025-300100-
/O.CON.KSLC.FF.W.0014.000000T0000Z-100730T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
537 PM MDT THU JUL 29 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR
EASTERN KANE COUNTY...

AT 524 PM MDT...THUNDERSTORM ACTIVITY OVER CROTON...WAHWEAP... 
COYOTE...LAST CHANCE...AND SMITHS RUN BASINS HAS SUBSIDED.  
HOWEVER...UP TO 1.5 TO 2.0 INCHES OF RAINFALL HAD FALLEN OVER THESE 
AREAS IN THE UPPER DRAINAGES. AS A RESULT...FLASH FLOODING IS LIKELY 
MOVING THROUGH THE MID TO LOWER PARTS OF THESE DRAINAGES AS OF 530 
PM.  THE FLOODING IS FORECAST TO TERMINATE AT LAKE POWELL NEAR 7 
PM.  

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 3701 11164 3737 11184 3749 11151 3742 11098
      3707 11119 3706 11124 3703 11124 3706 11130
      3704 11128 3700 11141

$$

MCINERNEY

904 
WGUS75 KSLC 300054
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
654 PM MDT THU JUL 29 2010

UTC025-300101-
/O.EXP.KSLC.FF.W.0014.000000T0000Z-100730T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
654 PM MDT THU JUL 29 2010

...THE FLASH FLOOD WARNING WILL EXPIRE AT 700 PM MDT FOR EASTERN KANE
COUNTY...

THUNDERSTORMS OVER THE DRAINAGES INCLUDED IN THE FLASH FLOOD WARNING 
HAVE CEASED.  ADDITIONALLY...IT IS ANTICIPATED THAT THE FLASH FLOOD 
HAS TERMINATED AT LAKE POWELL AT THIS TIME.  HOWEVER...RESIDUAL HIGH 
FLOWS MAY BE ENCOUNTERED AT THE LOWER DRAINAGES THROUGH THE EVENING 
HOURS.

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 3701 11164 3737 11184 3749 11151 3742 11098
      3707 11119 3706 11124 3703 11124 3706 11130
      3704 11128 3700 11141

$$

MCINERNEY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
302 PM MDT THU JUL 29 2010

.SYNOPSIS...AN UPPER LEVEL RIDGE WILL REMAIN NEARLY STATIONARY
OVER THE ROCKY MOUNTAIN REGION THROUGH THE END OF THE WEEK. THIS
WILL KEEP A MOIST AIRMASS IN PLACE OVER UTAH. AFTERNOON AND
EVENING THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY
RAIN...ESPECIALLY ACROSS CENTRAL AND SOUTHERN UTAH.

&&

.DISCUSSION...THE DEEP MONSOONAL MOISTURE WILL CONTINUE TO STREAM
NORTH INTO UTAH AROUND THE FOUR-CORNERS HIGH FOR THE NEXT SEVERAL
DAYS. SOUTHERLY FLOW WILL CONTINUE TO REINFORCE THE DEEP MOISTURE
IN PLACE ACROSS UTAH THIS THROUGH THE EVENING HOURS TONIGHT BEFORE
TURNING MORE WESTERLY ON FRIDAY. THIS WILL ALLOW THE NORTHWEST TO
DRY A BIT. IT WILL NOT...HOWEVER...PUT AN END TO AFTERNOON AND
EVENING SHOWERS AND THUNDERSTORMS...BUT ONLY ALLOW A SOMEWHAT
SMALL DECREASE IN THE POSSIBILITY. SHOWERS AND THUNDERSTORMS HAVE
KICKED OFF NEAR THE WEAK WAVE OVER SOUTHERN UTAH THAT SHOWED UP
THIS MORNING ON WATER VAPOR IMAGERY...NAM AND GFS MODELS.

PRECIPITABLE WATER VALUES OF 1.1 TO 1.5 INCHES EXPECTED THIS
AFTERNOON AND EVENING ACROSS SOUTH CENTRAL AND SOUTHEAST UTAH WILL
REMAIN VALID. THE SOUTHEAST HALF OF THE CWA WILL EXPERIENCE LIGHT
FLOW AND EXPECT STORMS TO AGAIN BE SLOW MOVING. THE FLASH FLOOD
WATCH FOR MOST OF CENTRAL AND SOUTHERN UTAH THROUGH THIS EVENING
WILL BE ALLOWED TO CONTINUE.

GOOD CAPE AND SPEED SHEAR ACROSS NORTHERN UTAH HAS ALLOWED
THUNDERSTORMS TO ROLL THROUGH THE WASATCH FRONT THIS AFTERNOON.
ALTHOUGH NONE HAVE BEEN SEVERE...THERE WILL REMAIN A CHANCE THAT
THUNDERSTORMS COULD BECOME SEVERE.

LITTLE CHANGE IN THE LATE JULY-EARLY AUGUST MONSOONAL PATTERN. THE
RIDGE WILL REMAIN OVER THE INTERMOUNTAIN REGION WELL INTO NEXT
WEEK WITH A WEAK TROUGH SITTING OFF THE WEST COAST. THE RESULTING
SOUTH TO SOUTHWEST WINDS WILL CAUSE MOISTURE TO CONTINUE A
NORTHWARD MIGRATION INTO UTAH AND KEEP THE CHANCE OF AFTERNOON
CONVECTION...TO VARIOUS DEGREES...ACROSS MOST OF THE COUNTY
WARNING AREA.

&&

.AVIATION...THE THREAT OF THUNDERSTORMS CONTINUES TO BE THE MAJOR
WEATHER CONCERN THIS AFTERNOON AT THE SLC TERMINAL...WITH A 30
PERCENT CHANCE THAT THUNDERSTORMS WILL IMPACT THE AREA BETWEEN 22Z
AND 04Z. OTHERWISE...WINDS ARE NOW EXPECTED TO STAY SOUTH THROUGH
THE DAY...WITH A SLIGHT CHANCE THAT THEY SWITCH TO THE NORTHWEST
BETWEEN 22Z AND 01Z.

&&

.FIRE WEATHER...SOUTHERLY FLOW WILL KEEP AMPLE MOISTURE OVER THE
FIRE DISTRICT FOR THE NEXT FEW DAYS. THIS WILL RESULT IN SCATTERED
AFTERNOON THUNDERSTORMS...THOUGH ALL WILL BE WET IN NATURE.
OTHERWISE...BECAUSE OF GENERALLY LIGHT WINDS AND RELATIVELY HIGH RH
VALUES...NO CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH UNTIL 10 PM MDT THIS EVENING FOR
     UTZ010-012>014-016-019>021-517-518.

WY...NONE.
&&

PUBLIC.........YOUNG
FIRE WEATHER...TRAPHAGAN
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
634 AM MDT THU JUL 29 2010

UTZ001>016-019>021-517-518-WYZ021-301245-
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-
634 AM MDT THU JUL 29 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 REMAINS IN PLACE ACROSS UTAH AND SOUTHWEST
WYOMING. NUMEROUS SLOW MOVING STORMS WILL DEVELOP ACROSS CENTRAL
AND SOUTHERN UTAH TODAY WITH SOME OF THESE STORMS BEING CAPABLE OF
PRODUCING VERY HEAVY RAIN WHICH MAY RESULT IN FLASH FLOODING.
THERE IS ALSO THE THREAT OF LOCALLY HEAVY RAIN AND ISOLATED
SEVERE THUNDERSTORMS...PRODUCING WIND GUSTS IN EXCESS OF 60
MPH...ACROSS NORTHERN UTAH AND SOUTHWEST WYOMING THIS AFTERNOON
THROUGH THIS EVENING.

THE COVERAGE OF THE THUNDERSTORMS IS EXPECTED TO DECREASE AFTER
1000 PM MDT ALTHOUGH A FEW STORMS WILL CONTINUE THROUGH THE NIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THIS MOIST AIRMASS WILL REMAIN IN PLACE THROUGH THE END OF THE
WEEK... RESULTING IN SCATTERED SHOWERS AND THUNDERSTORMS EACH
DAY... MAINLY IN THE AFTERNOONS AND EVENINGS.

HEAVY RAIN...ALONG WITH A THREAT OF FLASH FLOODING...WILL
CONTINUE ACROSS MAINLY CENTRAL AND SOUTHERN PORTIONS OF THE
OUTLOOK AREA INTO THE LATTER PART OF THE WEEK.

SOME DRYING AND A REDUCED THREAT OF THUNDERSTORMS WILL DEVELOP
ACROSS THE NORTHERN PORTIONS OF THE AREA EARLY THIS WEEKEND WHILE
THE SOUTH REMAINS MOIST.

.SPOTTER INFORMATION STATEMENT...

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

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
303 PM MDT THU JUL 29 2010

UTZ010-292145-
WASATCH PLATEAU/BOOK CLIFFS UT-
303 PM MDT THU JUL 29 2010

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN EMERY COUNTY UNTIL
345 PM MDT...

AT 256 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 20 MILES NORTH OF GREEN RIVER...IN THE HIGHER
TERRAIN TO THE EAST OF ROUTE 6 BETWEEN WELLINGTON AND GREEN RIVER.
THIS STORM WAS NEARLY STATIONARY.

THIS STORM IS PRODUCING LOCALLY HEAVY RAINFALL BETWEEN THE TOWNS OF
SUNNYSIDE AND GREEN RIVER. UP TO AN INCH OF RAIN HAS FALLEN IN THE
LAST HOUR. IN ADDITION TO HEAVY RAINFALL...SMALL HAIL AND WIND GUSTS
TO 40 MPH CAN BE EXPECTED WITH THIS ACTIVITY.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3934 11001 3931 11004 3921 11005 3918 11006
      3916 11010 3919 11024 3942 11016 3941 10999
      3937 10999
TIME...MOT...LOC 2059Z 109DEG 1KT 3928 11014

ROGOWSKI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
357 PM MDT THU JUL 29 2010

UTZ020-292245-
SOUTH CENTRAL UTAH UT-
357 PM MDT THU JUL 29 2010

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL KANE COUNTY UNTIL 445 PM
MDT...

AT 351 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 14 MILES NORTH OF BIG WATER...OR 34 MILES SOUTH
OF ESCALANTE...MOVING NORTHEAST AT 30 MPH.

THIS STORM IS PRODUCING A HEAVY RAINFALL WITH OVER AN INCH OF
RAINFALL. IN ADDITION TO HEAVY RAIN...WIND GUSTS TO 40 MPH AND SMALL
HAIL WILL BE POSSIBLE.

* LOCATIONS IMPACTED INCLUDE...
  RURAL CENTRAL KANE COUNTY...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3719 11167 3727 11169 3744 11147 3721 11136
      3721 11138 3724 11142 3721 11142
TIME...MOT...LOC 2155Z 242DEG 26KT 3728 11157

ROGOWSKI