Severe Thunderstorm Warning 23, NWS Salt Lake City, UT

000 
WWUS55 KSLC 112137
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
336 PM MDT FRI JUL 11 2008

UTC017-025-112200-
/O.CON.KSLC.SV.W.0023.000000T0000Z-080711T2200Z/
GARFIELD UT-KANE UT-
336 PM MDT FRI JUL 11 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR NORTH CENTRAL KANE AND SOUTHWESTERN GARFIELD COUNTIES...

AT 331 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. 
THIS STORM WAS LOCATED NEAR TROPIC...OR ABOUT 31 MILES WEST OF
ESCALANTE...MOVING SOUTHWEST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRYCE CANYON NATIONAL PARK AT 335 PM MDT

IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR GUSTY  
WINDS...LARGE HAIL...VERY HEAVY RAIN AND DANGEROUS CLOUD TO GROUND 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3739 11222 3757 11243 3779 11205 3763 11188
TIME...MOT...LOC 2136Z 040DEG 10KT 3761 11214

$$

RG

000 
WWUS55 KSLC 112154
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
353 PM MDT FRI JUL 11 2008

UTC017-025-112203-
/O.EXP.KSLC.SV.W.0023.000000T0000Z-080711T2200Z/
GARFIELD UT-KANE UT-
353 PM MDT FRI JUL 11 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL KANE AND
SOUTHWESTERN GARFIELD COUNTIES EXPIRES AT 400 PM MDT...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING
HAS BEEN ALLOWED TO EXPIRE. 

LAT...LON 3739 11222 3757 11243 3779 11205 3763 11188
TIME...MOT...LOC 2153Z 040DEG 10KT 3757 11218

$$

RG

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
301 PM MDT FRI JUL 11 2008

.SYNOPSIS...WEAK DRY COLD FRONT NOW INTO CENTRAL UTAH AND WILL
WASH OUT SATURDAY. MOISTURE OVER FAR SOUTHERN UTAH WILL CONTINUE
TO MOVE NORTHWARD INTO SOUTHERN UTAH TOMORROW AND SUNDAY THEN
ACROSS MUCH OF THE REGION BEGINNING MONDAY.

&&

.DISCUSSION...UPPER LOW CONTINUES TO TRACK EAST AS IT SPREADS OUT
INTO THE NORTHERN GREAT PLAINS. THE WEAK DRY COLD FRONT THAT PUSHED
THROUGH THE WASATCH FRONT THIS MORNING HAS MOVED TO CENTRAL UTAH
AND WILL MOVE A BIT FARTHER SOUTH AS IT BUMPS INTO THE MOISTURE
MOVING UP FROM ARIZONA. TEMPERATURES ARE DOWN ACROSS NORTHERN UTAH
TODAY AS PREVIOUSLY THOUGHT AND WILL ONLY RECOVER SLIGHTLY
TOMORROW AS THE AIRMASS REMAINS STAGNANT OVER THE NORTH. TERRAIN
DRIVEN CONVECTION HAS DEVELOPED OVER THE SOUTH CENTRAL MOUNTAINS
AND IS EXPECTED TO CONTINUE THROUGH THE EVENING HOURS. THE COLD
FRONT IS ABOUT TO MEET UP WITH THIS MOISTURE AND WILL SHOW ITSELF
IN TWO WAYS. FIRST IT IS SHOWING CONVECTION BEGINNING TO DEVELOP
SOUTH OF A LINE FROM ABOUT MILFORD TO GREEN RIVER. AND
SECOND...THE FRONT SHOULD KEEP MOISTURE FROM MOVING MUCH FARTHER
NORTH AS THE AIRMASS BEHIND IT IS VERY DRY AND QUITE STABLE. PW
VALUES OF .75 TO NEAR 1 INCH CONTINUE SOUTH OF THE FRONT AND THE
AFTERNOON AND EVENING COULD SHAPE UP TO BE ACTIVE WITH POSSIBLE
PULSE TYPE SEVERE THUNDERSTORMS.

MOISTURE WILL CONTINUE TO SURGE NORTHWARD EACH AFTERNOON OVER THE
SOUTH FOR THE NEXT COUPLE OF DAYS AND THE LATEST MODEL RUNS
INDICATE THAT TOMORROW MIGHT BE A SIMILAR DAY OVER THE EXTREME
SOUTHERN TIER OF UTAH AND A LITTLE LESS ACTIVE AS ONE MOVES
FARTHER NORTH. FLOW REMAINS LIGHT UNDER THE RIDGE FOR THE
FORESEEABLE FUTURE...ALTHOUGH SOME SOUTHWEST WINDS COULD CROP UP
MONDAY AND TUESDAY. THE MOISTURE WILL CONTINUE TO MOVE NORTHWARD
MONDAY AND TUESDAY...ALTHOUGH IT REMAINS SHALLOW AND SHOULD ONLY
KICK OFF ISOLATED TERRAIN DRIVEN CONVECTION OVER THE NORTH. THE
MOISTURE THEN SHIFTS SLOWLY EASTWARD ON WEDNESDAY WITH A DRIER
AIRMASS RETUNING FROM THE WEST FOR THURSDAY AND FRIDAY. ALL THE
WHILE THE RIDGE SHIFTS EASTWARD BUT NEVER LEAVES US.

&&

.AVIATION...VFR CONDITIONS WILL CONTINUE THROUGH THE NIGHT AT THE
KSLC TERMINAL.  NORMAL SOUTHEAST DRAINAGE WIND IS EXPECTED TO BE
DELAYED UNTIL AROUND 0800 UTC.  HOWEVER...THERE IS A 30 PERCENT
CHANCE THAT THE SOUTHEAST DRAINAGE WINDS WILL DEVELOP BY 0600 UTC.

&&

.FIRE WEATHER...WEAK UPPER LEVEL WAVE IN WESTERLY FLOW IS PRESSING
ACROSS UTAH THIS AFTERNOON. THIS HAS PUSHED A WEAK LOW LEVEL COLD
FRONT INTO SOUTH CENTRAL UTAH. DEEPER MOISTURE HAS CREPT NORTHWARD
ACROSS SOUTHERN UTAH AND INTO THE WASATCH PLATEAU/BOOK CLIFFS AND
CASTLE COUNTRY. SCATTERED THUNDERSTORMS HAVE POPPED UP FROM
AROUND CAPITOL REEF TO BRYCE CANYON AND SOUTHWEST TO NEAR BRIAN
HEAD. PULSE TYPE STORMS WILL CONTINUE THROUGH LATE AFTERNOON WITH
SOME ACTIVITY BECOMING MORE ORGANIZED ACROSS THE FAR SOUTHWEST INTO
THE EVENING HOURS. MOISTURE FILTERING DOWN INTO THE BOUNDARY LAYER
HAS RAISED HUMIDITIES FOR THE SOUTHERN DISTRICT. SOME CELLS WILL
HAVE SIGNIFICANT LIGHTNING BUT ALSO HEAVY RAIN.

ACROSS THE NORTH IT IS VERY DRY WITH BREEZY NORTH WINDS (GUSTS 25
MPH) BEHIND THE FRONT THAT MOVED THROUGH EARLY THIS MORNING. THIS
WILL CONTINUE TO BE THE WEATHER FOR THE NORTH OVER THE WEEKEND BUT
WINDS WILL BE LIGHTER WITH A SLIGHT WARMING TREND IN THE NORTH.

SIMILAR WEATHER PATTERN ON SATURDAY AND SUNDAY FOR THE SOUTH BUT A
SLIGHT SHIFT OF THE UPPER HIGH ACROSS NEVADA SHOULD SHUNT THE DEEPER
MOISTURE A TAD FURTHER SOUTH TOWARD THE ARIZONA BORDER. MAIN THREAT
FOR CONVECTION WILL BE THE SOUTHWEST PART OF UTAH AND INTO THE GRAND
STAIRCASE AND BRYCE CANYON AREA. SLIGHTLY STRONGER SOUTHWEST FLOW
ACROSS THE SOUTH EARLY NEXT WEEK BUT HUMIDITY WILL BE ELEVATED.

MAIN MOISTURE WILL NOT SURGE NORTHWARD UNTIL MONDAY...BUT STILL MAY
NOT REACH THE NORTHERN ONE THIRD OF UTAH UNTIL TUESDAY DUE TO
WESTERLIES PREVAILING IN THIS NORTHERN REGION. MODELS SUGGEST ENOUGH
INCREASE OF PRECIPITABLE WATER THAT COULD DEVELOP ISOLATED
CONVECTION UP TO THE OQUIRRH AND TINTIC MOUNTAINS LATE MONDAY.

&&

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

&&

PUBLIC.........YOUNG
FIRE WEATHER...TARDY
AVIATION.......GRAHAM

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
517 AM MDT FRI JUL 11 2008

UTZ001>016-019>021-517-518-WYZ021-121130-
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-
517 AM MDT FRI JUL 11 2008

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

.DAY ONE...TODAY AND TONIGHT

INCREASING MOISTURE OVER SOUTHERN UTAH WILL ALLOW FOR AFTERNOON
AND EVENING SHOWERS AND THUNDERSTORMS. SOME OF THESE STORMS WILL
BE CAPABLE OF PRODUCING LOCALLY HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

MOISTURE WILL REMAIN OVER SOUTHERN UTAH THROUGH THE WEEKEND BEFORE
SPREADING INTO NORTHERN UTAH AND SOUTHWEST WYOMING TUESDAY AND
WEDNESDAY. THIS WILL ALLOW FOR A CONTINUED CHANCE OF SHOWERS AND
THUNDERSTORMS.

.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)