Flash Flood Watch 1, NWS Salt Lake City, UT

026 
WGUS65 KSLC 061744
FFASLC

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1144 AM MDT WED JUL 6 2011

UTZ019-020-518-070300-
/O.CON.KSLC.FF.A.0001.110706T1800Z-110707T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
SOUTHERN MOUNTAINS-
1144 AM MDT WED JUL 6 2011

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 9 PM MDT THIS
EVENING...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF SOUTHERN UTAH AND SOUTHWEST UTAH...INCLUDING THE 
  FOLLOWING AREAS...IN SOUTHERN UTAH...SOUTH CENTRAL UTAH AND 
  UTAHS DIXIE AND ZION NATIONAL PARK. IN SOUTHWEST UTAH...
  SOUTHERN MOUNTAINS.

* UNTIL 9 PM MDT THIS EVENING

* A VERY MOIST AIR MASS AND LIGHT SOUTHERLY FLOW ALOFT WILL 
  SPAWN SHOWERS AND THUNDERSTORMS THIS AFTERNOON THROUGH EARLY 
  THIS EVENING. SOME OF THE STRONGER SHOWERS AND THUNDERSTORMS 
  WILL PRODUCE HEAVY RAINFALL. THE COMBINATION OF THE HEAVY RAIN 
  AND THE SLOW MOVEMENT OF THESE SHOWERS AND THUNDERSTORMS COULD 
  RESULT IN FLASH FLOODING ACROSS THE WATCH AREA. 

* FLASH FLOODING WILL PRIMARILY AFFECT SLOT CANYONS...DRY 
  WASHES...AND THE SLICK ROCK AREAS OF SOUTHERN UTAH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

$$

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

446 
WGUS65 KSLC 070306
FFASLC

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
906 PM MDT WED JUL 6 2011

UTZ019-020-518-070500-
/O.EXP.KSLC.FF.A.0001.000000T0000Z-110707T0300Z/
/O.NEW.KSLC.FF.A.0002.110707T0306Z-110707T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
SOUTHERN MOUNTAINS-
906 PM MDT WED JUL 6 2011

...FLASH FLOOD WATCH IN EFFECT UNTIL 11 PM MDT THIS EVENING...
...FLASH FLOOD WATCH HAS EXPIRED...

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS EXTENDED THE

* FLASH FLOOD WATCH FOR PORTIONS OF SOUTHERN UTAH AND SOUTHWEST 
  UTAH...INCLUDING THE FOLLOWING AREAS...IN SOUTHERN UTAH...
  SOUTH CENTRAL UTAH AND UTAHS DIXIE AND ZION NATIONAL PARK. IN 
  SOUTHWEST UTAH...SOUTHERN MOUNTAINS.

* UNTIL 11 PM MDT THIS EVENING

* THE THREAT OF HEAVY RAIN AND ASSOCIATED FLASH FLOODING WILL
  CONTINUE IN THE WATCH AREA THROUGH LATE THIS EVENING AS
  THUNDERSTORMS SPREAD NORTH OUT OF ARIZONA.

* FLASH FLOODING WILL PRIMARILY AFFECT SLOT CANYONS...DRY
  WASHES...AND THE SLICK ROCK AREAS OF SOUTHERN UTAH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&


$$

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

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1011 PM MDT TUE JUL 5 2011

.SYNOPSIS...HIGH PRESSURE CENTERED JUST EAST OF THE FOUR CORNERS
REGION WILL REMAIN IN PLACE THROUGH LATE THIS WEEK. MOISTURE WILL
CONTINUE TO ROTATE AROUND THIS HIGH AND INTO UTAH THROUGH MOST OF
THE WEEK.

&&

.DISCUSSION...THE MOIST AIRMASS REMAINS IN PLACE ACROSS THE CWA
THIS EVE. CONVECTION HAS BECOME FOCUSED ACROSS NORTH CENTRAL UT
THEN SOUTH INTO SOUTHWESTERN UT. THIS APPEARS TO BE IN RESPONSE TO
A WEAK UPPER LEVEL SHORT WAVE FEATURE. MODELS SORT OF DEPICT THIS
AND DONT QUITE HAVE THE LOCATION RIGHT BUT ARE CLOSE.

THIS WEAK WAVE IS FORECAST TO MOVE SLOWLY EAST OVERNIGHT INTO WED
MORNING THEN DISSIPATE. THIS SHOULD KEEP CONVECTION ACTIVE ALONG
IT INTO WED.

CONVECTION ELSEWHERE HAS DIMINISHED AND WILL BE UPDATING FORECASTS
SHORTLY TO LOWER OR REMOVE POPS IN SOME AREAS.

EXPECT ANOTHER ACTIVE DAY ACROSS THE CWA AGAIN WED WITH SOME
SUPPRESSION OVER THE NORTH IN THE WAKE OF TONIGHTS WAVE. HEAVY
RAINS APPEAR TO BE THE BIGGEST THREAT.

QUICK GLANCE AT NEW 00Z NAM SHOWS MOISTURE REMAINS IN PLACE INTO
SAT.

&&

.HYDROLOGY...FLOOD WARNINGS CONTINUE FOR THE LOGAN RIVER...SPRING
CREEK AND THE SOUTH SLOPES OF THE UINTA MOUNTAINS. ALL OTHER
WARNINGS WERE ALLOWED TO EXPIRE INCLUDING THE UPPER WEBER. CLOUDY
CONDITIONS OVER THE PAST TWO DAYS HAVE DECREASED SNOWMELT RATES.
IN ADDITION...SNOW COVERAGE IS RAPIDLY DECREASING ACROSS MANY
BASINS. HOWEVER...SOME RAIN HAS FALLEN IN LITTLE COTTONWOOD CANYON
AND THE CREEK HAS COME UP RAPIDLY ABOVE FLOOD STAGE AGAIN THIS
EVE AND HAVE REISSUED THE WARNING FOR THAT DRAINAGE. ADDITIONAL
HEAVY RAINS ARE FALLING IN THE AMERICAN FORK DRAINAGE IN UTAH
COUNTY AND WILL MONITOR THIS CAREFULLY. LATEST REPORTS FROM LAW
ENFORCEMENT INDICATE A MUDSLIDE HAS ALREADY OCCURRED IN THE
AMERICAN FORK CANYON.

EXPECT AREA RIVERS TO CONTINUE TO RUN VERY HIGH FOR THE NEXT
SEVERAL DAYS AND THEN A DOWNWARD TREND IS EXPECTED.
REGARDLESS...RIVERS WILL CONTINUE TO FLOW VERY FAST AND VERY COLD.
EXTREME CAUTION IS URGED NEAR ANY AREA WATERWAYS OVER THE NEXT FEW
DAYS.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED AT THE SLC TERMINAL THROUGH
THE NIGHT AND ANY THUNDERSTORMS SHOULD REMAIN WELL TO THE SOUTH.
SOUTHEAST WINDS WILL PREVAIL THROUGH THE NIGHT WITH SOME GUSTINESS
BETWEEN 04Z AND 06Z FROM THE STORMS OVER UTAH COUNTY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.
&&

WILENSKY/STRUTHWOLF

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
940 AM MDT TUE JUL 5 2011

UTZ001>016-019>021-517-518-WYZ021-061300-
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-
940 AM MDT TUE JUL 5 2011

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

.DAY ONE...TODAY AND TONIGHT

RIVERS ACROSS THE NORTHERN AND CENTRAL OUTLOOK AREA WILL CONTINUE
TO FLOW AT ELEVATED LEVELS TODAY...WITH SEVERAL OF THESE RIVERS
REMAINING NEAR OR ABOVE FLOOD STAGE.

IT IS IMPORTANT TO NOTE THAT FLOWS THROUGH MANY WATERWAYS REMAIN
COLD...SWIFT AND POWERFUL...EVEN THOSE THAT ARE BELOW FLOOD
STAGE. THIS COMBINATION IS DANGEROUS NOT JUST FOR CHILDREN...BUT
ADULTS AS WELL. HYPOTHERMIA CAN QUICKLY SET IN WHEN EXPOSED TO
WATER OF THESE TEMPERATURES...SIGNIFICANTLY LIMITING YOUR ABILITY
TO RESCUE YOURSELF.

ABUNDANT MOISTURE STREAMING NORTH AROUND THE HIGH PRESSURE NEAR THE
FOUR CORNERS WILL BRING AN INCREASED THREAT OF SHOWERS AND
THUNDERSTORMS THROUGH TONIGHT. HEAVY RAINFALL AND GUSTY WINDS ARE
POSSIBLE IN ANY THUNDERSTORMS THAT DEVELOP ACROSS MUCH OF THE STATE.
LOCALIZED FLASH FLOODING IS POSSIBLE IN THE SLOT CANYONS AND SLICK
ROCK AREAS OF SOUTHERN UTAH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

RIVERS WILL CONTINUE A GRADUAL DOWNWARD TREND IN FLOWS MIDWEEK. A
FEW OF THE RIVERS ACROSS NORTHERN UTAH MAY REMAIN NEAR OR SLIGHTLY
ABOVE FLOOD STAGE THROUGH WEDNESDAY. ALL RIVERS ACROSS NORTHERN UTAH
WILL CONTINUE TO FLOW FAST AND COLD FOR THE NEXT SEVERAL DAYS.

HIGH PRESSURE NEAR THE FOUR CORNERS WILL REMAIN IN PLACE THROUGH THE
EARLY PART OF NEXT WEEKEND. SHOWERS AND THUNDERSTORMS WILL BECOME
MORE NUMEROUS AS THE WEEK PROGRESSES...WITH AREAS OF HEAVY RAINFALL
POSSIBLE.

A SOMEWHAT DRIER SOUTHWEST FLOW ALOFT WILL DEVELOP LATE IN THE
WEEKEND...AND SPREAD ACROSS THE AREA EARLY NEXT WEEK. SHOWERS AND
THUNDERSTORMS ARE STILL EXPECTED...THOUGH MOST OF THE ACTIVITY MAY
SHIFT INTO THE EASTERN HALF OF UTAH.

.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)