High Wind Warning 12, NWS Salt Lake City, UT

000 
WWUS75 KSLC 050301
NPWSLC

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
901 PM MDT FRI JUL 4 2008

UTZ005-050415-
/O.EXP.KSLC.HW.W.0012.000000T0000Z-080705T0300Z/
GREAT SALT LAKE DESERT AND MOUNTAINS-
901 PM MDT FRI JUL 4 2008

...HIGH WIND WARNING HAS EXPIRED...

THE HIGH WIND WARNING IS NO LONGER IN EFFECT. 

WINDS HAVE SWITCHED TO NORTHWEST AND DECREASED TO 15 TO 25 MPH
ACROSS THE WARNING AREA.

$$

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
1015 AM MDT FRI JUL 4 2008

.SYNOPSIS...INCREASING SOUTHWEST FLOW WILL BE OVER THE AREA TODAY
AS A WEAKENING UPPER TROUGH MOVES INTO THE GREAT BASIN. THE
ASSOCIATED COLD FRONT WILL SLOWLY CROSS NORTHERN UTAH TONIGHT AND
SATURDAY THEN STALL. ANOTHER WEAK DISTURBANCE WILL AFFECT NORTHERN
UTAH ON SUNDAY.

&&

.DISCUSSION...MID LEVEL RIDGE WHICH AS RESIDED ACROSS THE REGION THE
PAST COUPLE OF DAYS HAS SHIFTED EAST...AND IS NOW CENTERED ALONG THE
CENTRAL/NORTHERN ROCKIES. THIS IS DOWNSTREAM FROM SHORTWAVE TROUGH
NOW MOVING ONSHORE ACROSS THE PACIFIC NORTHWEST. SOUTHWESTERLY FLOW
BETWEEN THESE TWO FEATURES WILL INCREASE ACROSS MUCH OF THE FORECAST
AREA THIS AFTERNOON...RESULTING IN WARM AND WINDY CONDITIONS.

MID LEVEL MOISTURE...PRIMARILY CONFINED ABOVE 550MB BASED ON
REGIONAL 12Z SOUNDINGS...HAS SPREAD ACROSS MUCH OF THE GREAT BASIN
THIS MORNING. ALREADY SEEING CONSIDERABLE VIRGA ACROSS MUCH OF THE
FORECAST AREA...AND WITH AFTERNOON HEATING/DEEP MIXING DRY
MICROBURSTS APPEAR LIKELY THIS AFTERNOON. GIVEN HEIGHT OF MOISTURE
LAYER....SUSPECT INSTABILITY WILL BE SUPPORTIVE OF ONLY ISOLATED
LIGHTNING STRIKES DESPITE LIKELIHOOD OF WIDESPREAD VIRGA.

SURFACE FRONT ASSOCIATED WITH AFOREMENTIONED TROUGH EXPECTED TO
REACH NORTHERN UT LATE THIS EVENING...THEN CONTINUE SOUTH THROUGH
NORTHERN UT OVERNIGHT BEFORE STALLING ACROSS CENTRAL UT SATURDAY.
LINGERING MOISTURE ACROSS THE EAST WILL SUPPORT A THREAT OF DIURNAL
CONVECTION...WHILE COOLER AIR ALOFT BEHIND THIS FRONT KNOCKS SEVERAL
DEGREES OFF MAX TEMPS ALONG THE WASATCH FRONT.

UPDATED EARLIER TO INCREASE CLOUD COVER ACROSS NORTHEASTERN CWA...AS
WELL AS INCREASE AFTERNOON WINDS ALONG THE WASATCH FRONT. OTHERWISE
GOING FORECAST APPEARS IN GOOD SHAPE.

&&

.AVIATION...MOISTURE PLUME ACROSS NRN UTAH TODAY WILL RESULT IN
SCATTERED LIGHT SHOWERS/ISOLATED THUNDERSTORMS AFFECTING THE KSLC
TERMINAL TODAY. STRONG AND ERRATIC WINDS ARE POSSIBLE WITH ANY OF
THE SHOWERS/STORMS OVER OR NEAR THE TERMINAL. PREVAIL SURFACE WINDS
AWAY FROM SHOWERS/STORMS WILL BE OUT OF THE SOUTH...AND WILL BE ON
THE INCREASE THROUGH EARLY AFTERNOON.

&&

.FIRE WEATHER...THE DOMINATE UPPER RIDGE ACROSS THE INTERIOR WEST
WILL HOLD FIRM TODAY. AN UPPER LEVEL TROUGH WILL MOVE EAST ACROSS
THE NRN ROCKIES TONIGHT/EARLY SATURDAY...FORCING THE UPPER RIDGE
SE INTO THE SRN ROCKIES. WINDS WILL INCREASE AHEAD OF THE UPPER
TROUGH ACROSS WRN/SRN UTAH. ALREADY LOW RH VALUES COMBINED WITH
THESE WINDS WILL CREATE SEVERE FIRE WEATHER CONDITIONS INTO THIS
EVENING.

THE MOISTURE PLUME THAT SPREAD NORTH ACROSS UTAH OVERNIGHT WILL
CREATE SCATTERED HIGH-BASED SHOWER/ISOLATED THUNDERSTORM ACTIVITY
TODAY. SPOTTY WETTING RAINS IN THE MOUNTAINS ABOUT ALL TO EXPECTED
AS THE SHOWERS/STORMS WILL BE OF A SHORT DURATION. DRIER AIR WILL
WORK INTO WRN UT SATURDAY...WITH PLENTY OF MOISTURE REMAINING OVER
ERN AND NRN PORTIONS OF THE STATE. THE DRIER AIR WILL PUNCH THROUGH
THE STATE SUNDAY...LEAVING ANY THUNDERSTORM ACTIVITY CONFINED TO THE
FAR NRN AND SRN EXTREMES OF UTAH.

&&

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...RED FLAG WARNING FROM 11 AM FRIDAY TO 10 PM FRIDAY FOR UTZ420-
     UTZ422-UTZ423-UTZ424-UTZ433-UTZ434-UTZ435-UTZ436-UTZ437-
     UTZ439-UTZ440.

WY...NONE.

&&

WILENSKY/YOUNG

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
554 AM MDT FRI JUL 4 2008

UTZ001>016-019>021-517-518-WYZ021-051100-
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-
554 AM MDT FRI JUL 4 2008

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

.DAY ONE...TODAY AND TONIGHT

WIDESPREAD HAZARDOUS FIRE WEATHER CONDITIONS ARE EXPECTED ACROSS
WESTERN AND SOUTHERN PORTIONS OF THE OUTLOOK AREA TODAY INTO
TONIGHT...INCLUDING THE WASATCH FRONT. THESE CONDITIONS WILL
RESULT FROM A COMBINATION OF GUSTY SOUTHWEST WINDS AND VERY LOW
HUMIDITIES. USE EXTREME CAUTION WITH FIREWORKS THIS INDEPENDENCE
DAY DUE TO THESE CONDITIONS.

IN ADDITION...BRIEF STRONG MICROBURST WINDS ARE POSSIBLE FROM
HIGH BASED SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON AND
EVENING OVER PRETTY MUCH THE ENTIRE OUTLOOK AREA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A WEAK COLD FRONT WILL BRING SOME DRYING TO THE NORTHWEST PORTIONS
OF THE OUTLOOK AREA SATURDAY WHILE SHOWERS AND THUNDERSTORMS WILL
INCREASE IN COVERAGE OVER THE EAST AND SOUTH.

ANOTHER WEAK SYSTEM WILL BRING A CHANCE OF SHOWERS AND
THUNDERSTORMS BACK TO THE NORTH SUNDAY...THEN DRY WEATHER WILL
RETURN TO THE AREA MONDAY AND PERSIST THROUGH MID WEEK.

.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)