Severe Thunderstorm Warning 6, NWS Salt Lake City, UT

000 
WWUS55 KSLC 022056
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
256 PM MDT TUE JUN 2 2009

UTC049-051-022105-
/O.CAN.KSLC.SV.W.0006.000000T0000Z-090602T2115Z/
UTAH UT-WASATCH UT-
256 PM MDT TUE JUN 2 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASATCH AND EAST
CENTRAL UTAH COUNTIES IS CANCELLED...

THE STORM WEAKENED RAPIDLY AS IT MOVED NORTH INTO SOUTHEASTERN 
WASATCH COUNTY...AND IS NO LONGER SEVERE. THEREFORE THE WARNING HAS 
BEEN CANCELLED.

LAT...LON 4020 11121 4011 11090 3985 11113 3993 11129
TIME...MOT...LOC 2055Z 200DEG 13KT 4000 11115

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1033 AM MDT TUE JUN 2 2009

.SYNOPSIS...A CLOSED LOW WILL REMAIN ALONG THE WEST COAST THROUGH
THE WEEK WITH A SOUTHWEST FLOW ACROSS UTAH. THIS WILL BRING A
DRYING TREND TO THE AREA TODAY AND WEDNESDAY THEN MOISTURE WILL
START TO RETURN THURSDAY.

&&

.DISCUSSION...THE LAST OF THE SHOWERS ASSOCIATED WITH LAST NIGHTS
WIDESPREAD RAINFALL ACROSS NORTHERN UTAH AND SOUTHWEST WYOMING
ARE MAKING THEIR WAY OUT OF THE CWA THIS MORNING. THIS HAS LEFT
PARTLY CLOUDY SKIES ACROSS MOST OF THE AREA...WITH ONLY SOME
LINGERING SHOWERS AND CLOUDY SKIES ACROSS SOUTHWEST WYOMING AND
NEAR THE UTAH-IDAHO BORDER. AS SUCH...HAVE ISSUED AN UPDATED
FORECAST TO REDUCE POPS AND CLOUD COVER FOR MOST OF THE AREA FOR
THE MORNING HOURS.

HOWEVER...THIS BREAK WILL BE SHORT-LIVED...AS ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP THIS AFTERNOON.
AS THE AFTERNOON WEARS ON...THUNDERSTORMS ARE EXPECTED TO BECOME
MORE FOCUSED ON THE NORTHERN AND EASTERN PARTS OF THE CWA...AS DRY
AIR BEGINS MOVING INTO SOUTHWEST UTAH. THE MAIN THREAT LOOKS TO BE
HEAVY RAIN AND THE POTENTIAL FOR SOME ISOLATED FLOODING...AS
YESTERDAYS ACTIVITY PRODUCED RAINFALL TOTALS OF MORE THAN HALF AN
INCH IN MANY AREAS...AND THIS MORNINGS SOUNDING CONTINUED TO
INDICATE A MOIST AIRMASS...WITH A PRECIPITABLE WATER VALUE OF
0.92 INCHES.

THE DRYING TREND FROM THE SOUTHWEST IS DUE TO A SOUTHERLY FLOW
SET UP BY THE LOW PRESSURE SYSTEM SPINNING OFF THE COAST OF
CALIFORNIA. TIMING WHEN EXACTLY THIS FEATURE MOVES INTO THE GREAT
BASIN WILL LIKELY BE THE MAJOR FORECAST CHALLENGE OF THE NEXT
COUPLE OF DAYS...AS THE MODELS HAVE BEEN SOMEWHAT INCONSISTENT IN
THE MOVEMENT OF THIS SYSTEM.

&&

.AVIATION...FOR THE SALT LAKE TERMINAL...SHOWER AND THUNDERSTORM
DEVELOPMENT WILL ONCE AGAIN RAMP UP THIS AFTERNOON AND LINGER
THROUGH THIS EVENING. STORMS ARE EXPECTED TO BUILD OVER THE TERRAIN
AFTER 18Z...BUT SHOULD REMAIN FOCUSED OVER THE SURROUNDING HIGH
TERRAIN THROUGH MID AFTERNOON. OPERATIONAL WEATHER CONCERNS WILL
FOCUS AROUND THESE STORMS DURING THE 22-04Z WINDOW...AS A 40 PERCENT
CHANCE OF DIRECT IMPACT EXISTS AT THE TERMINAL. OUTSIDE OF THE STORM
THREATS...NORMAL DIURNAL WIND SHIFTS AND VFR CONDITIONS ARE
EXPECTED.

&&

.FIRE WEATHER...HIGH PRESSURE CONTINUES TO BREAK DOWN IN ADVANCE
OF AN APPROACHING PACIFIC LOW PRESSURE CURRENTLY OFF THE
CALIFORNIA COAST. AHEAD OF THIS LOW...DRIER AND WINDIER
CONDITIONS WILL SPREAD FROM SOUTHWEST TO NORTHEAST ACROSS THE
DISTRICT THROUGH MIDWEEK. THAT SAID...AMPLE MOISTURE WILL REMAIN
IN PLACE ACROSS THE NORTHERN HALF OF THE DISTRICT TODAY FOR
ANOTHER ROUND OF SCATTERED SHOWER AND THUNDERSTORM DEVELOPMENT
FOR THE AFTERNOON AND EVENING HOURS. DEVELOPED STORMS WILL
CONTINUE TO MOVE SLOWLY DUE TO LIGHT STEERING WINDS
ALOFT...ALLOWING THE CHANCE OF WETTING RAINS TO REMAIN ELEVATED
FOR THOSE AREAS THAT EXPERIENCE STORM ACTIVITY.

WETTING RAIN POTENTIAL WILL DECREASE IN THE SOUTH HOWEVER...AS
AREAL COVERAGE OF SHOWERS AND STORMS WILL TREND TO DECREASE AS
DRIER AIR BEGINS TO WORK IN FROM THE SOUTHWEST. THIS DRYING TREND
WILL PUSH INTO NORTHERN SECTIONS WEDNESDAY...LIMITING STORM
DEVELOPMENT TO GENERALLY ISOLATED MOUNTAIN COVERAGE DURING PEAK
AFTERNOON HEATING THROUGHOUT THE DISTRICT.

FOCUSED WEATHER CONCERNS FOR THE MIDWEEK PERIOD WILL REVOLVE
AROUND INCREASING SOUTHERLY SURFACE WINDS AND DRYING
CONDITIONS AS THE LOW SLOWLY APPROACHES FROM THE WEST...ESPECIALLY
FOR THE SOUTHERN AND WESTERN ZONES.

&&

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

&&

PUBLIC...SCHOENING
FIRE WEATHER...MERRILL
AVIATION...MERRILL

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
936 AM MDT TUE JUN 2 2009

UTZ001>016-019>021-517-518-WYZ021-031200-
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-
936 AM MDT TUE JUN 2 2009

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED
ACROSS THE OUTLOOK AREA ONCE AGAIN TODAY...WITH THE GREATEST
COVERAGE DURING THE AFTERNOON HOURS. A FEW OF THESE STORMS WILL
PRODUCE LOCALLY HEAVY RAIN...BRINGING A THREAT OF ISOLATED FLASH
FLOODING. STORMS WILL BE MOST WIDESPREAD ACROSS THE NORTHERN AND
EASTERN PORTIONS OF THE AREA...WHILE A DRYING TREND WILL BEGIN FROM
THE SOUTHWEST.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE DRYING TREND WILL SPREAD ACROSS MORE OF THE OUTLOOK AREA
WEDNESDAY THROUGH THURSDAY...WITH GUSTY SOUTHWEST WINDS
ACCOMPANYING THIS DRIER AIR. ISOLATED HIGH BASED THUNDERSTORMS
COULD STILL OCCUR THROUGH THURSDAY...WITH LOCALLY DAMAGING WINDS
POSSIBLE. A LOW PRESSURE SYSTEM IS EXPECTED TO MOVE INTO THE GREAT
BASIN AT THE END OF THE WEEK AND INTO THE WEEKEND...BRINGING AN
INCREASED CHANCE OF STRONG 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)