Severe Thunderstorm Warning 22, NWS Salt Lake City, UT

000 
WWUS55 KSLC 272210
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
409 PM MDT FRI JUL 27 2007

UTC053-272230-
/O.CON.KSLC.SV.W.0022.000000T0000Z-070727T2230Z/
WASHINGTON UT-
409 PM MDT FRI JUL 27 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT
FOR SOUTH CENTRAL WASHINGTON COUNTY...

AT 405 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WASHINGTON...OR ABOUT 8 MILES EAST OF ST GEORGE...MOVING
SOUTHEAST AT 15 MPH.

IN ADDITION TO HAIL AND DAMAGING WINDS...VERY HEAVY RAIN IS BEING 
REPORTED FROM THIS STORM. 

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL SOUTHERN WASHINGTON COUNTY AT 420 PM MDT

LAT...LON 3726 11349 3712 11363 3684 11327 3703 11308

$$

BAS

000 
WWUS55 KSLC 272222
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
422 PM MDT FRI JUL 27 2007

UTC053-272232-
/O.EXP.KSLC.SV.W.0022.000000T0000Z-070727T2230Z/
WASHINGTON UT-
422 PM MDT FRI JUL 27 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WASHINGTON
COUNTY EXPIRES AT 430 PM MDT...

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

LAT...LON 3726 11349 3712 11363 3684 11327 3703 11308

$$

BAS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
300 PM MDT FRI JUL 27 2007

.SYNOPSIS...HIGH PRESSURE WILL CONTINUE TO SHIFT WEST INTO THE
GREAT BASIN. THIS WILL ALLOW A GRADUAL DRYING TREND TO SPREAD FROM
NORTHWEST UTAH INTO THE SOUTH THROUGH THE WEEKEND.

&&

.DISCUSSION...THE VERY MOIST AND UNSTABLE AIRMASS REMAINS IN PLACE
ACROSS THE FORECAST AREA WITH THE EXCEPTION OF NORTHWEST UTAH. DRY
AIR OVER CALIFORNIA AND NEVADA CONTINUES TO PUSH INTO NORTHWEST
UTAH. THIS REMAINS APPARENT ON SATELLITE WATER VAPOR IMAGERY AS WELL
AS IR IMAGERY AND MODEL OUTPUT. PW VALUES IN EXCESS OF 1 INCH PER
GOES DERIVED PW IMAGERY OVER SOUTHERN AND EASTERN UTAH REMAIN WITH A
TONGUE OVER EAST CENTRAL NEVADA ASSOCIATED WITH A WEAK SHORT WAVE
MOVING EAST INTO THE STATE. CONVECTION BEGAN TO FORM WITH THIS
FEATURE AROUND NOON AND LOOKED TO MOVE INTO NORTHWEST UTAH SO UPDATED
THE FORECAST EARLIER TO INCREASE THUNDERSTORMS FOR THE NORTHWEST THIS
AFTERNOON AND EVENING. THE DEEPER MOISTURE OVER THE SOUTH IS ALSO
BEGINNING TO FIRE UP AND WILL SUPPORT AFTERNOON AND EVENING
THUNDERSTORMS ONCE AGAIN. HEAVY RAINS UNDER SLOW MOVING STORMS WILL
AGAIN BE POSSIBLE...ALTHOUGH MUCH LESS THAN THE LAST FEW DAYS. BUFR
DATA ALREADY SHOWS SLC WITH AN INCREASINGLY STABLE AND DRY AIRMASS
WITH CDC FOLLOWING SUIT BY TOMORROW MORNING AND THEN CONTINUING
EASTWARD ACCORDINGLY. SUSPECT AIRMASS WILL NOT DRY AS FAST AS THE
MODELS HINT AND ISOLATED CONVECTION...MAINLY OVER THE SPINE OF UTAH
AND EAST...WILL DEVELOP AGAIN TOMORROW.

MID LEVEL RIDGE WILL CONTINUE TO DEVELOP ACROSS THE GREAT BASIN
AND RESULT IN A WEAK NORTHWEST FLOW UNDER THE DRYING AIRMASS WHICH
SHOULD OVERTAKE MOST OF THE STATE BY SUNDAY. THIS WILL MOST LIKELY
BE THE DRIEST DAY AS THE RIDGE AXIS WILL AGAIN SHIFT EASTWARD MONDAY
AND OPEN THE DOOR TO ANOTHER BOUT OF MONSOON MOISTURE. LATEST GFS
INDICATES THAT ISOLATED THUNDERSTORMS ON MONDAY...MAINLY OVER THE
SOUTH WILL GIVE WAY TO SCATTERED CONVECTION ON TUESDAY AS MOISTURE
CONTINUES TO SPREAD NORTHWARD. BY WEDNESDAY AND THURSDAY EXPECT
WIDESPREAD CONVECTION AS THE MONSOON WILL AGAIN DOMINATE. YESTERDAY
THE MODELS SUGGESTED ANOTHER PERIOD OF DRYING FOR THE LATTER PART OF
THE WEEK AND ON INTO THE WEEKEND BUT TODAY THINGS LOOK DIFFERENT
WITH MOISTURE HANGING AROUND INTO THE WEEKEND. IF THIS OCCURS GUSTY
SOUTHWEST WINDS WILL NOT MATERIALIZE AND FIRE PROBLEMS WILL REMAIN
SUBDUED WITH AFTERNOON AND EVENING THUNDERSTORMS REMAINING
STEADFAST.

&&

.FIRE WEATHER...WIDELY SCATTERED THUNDERSTORM WITH HEAVY RAIN
HAVE FORMED ACROSS FAR NORTHERN UTAH...ALONG THE NEVADA BORDER...
JUST DEVELOPING IN SOUTH CENTRAL UTAH AND ACROSS EASTERN UTAH.
DISTURBANCE MOVING ACROSS NORTHERN UTAH EARLY THIS EVENING WILL
ENHANCE ACTIVITY IN THE NORTH WITH HEATING OF THE DAY INCREASING
ACTIVITY IN THE SOUTHERN AREAS. MUCH DRIER AIR WILL FILTER
IN FROM THE NORTHWEST TONIGHT BEHIND SAID DISTURBANCE. SIGNIFICANT
DRYING AND MUCH LESS THUNDERSTORM ACTIVITY THIS WEEKEND. HUMIDITIES
WILL TREND DOWN SATURDAY AND SUNDAY AS DEW POINTS LOWER AND MAXIMUM
TEMPERATURES INCREASE BOTH DAYS. GENERALLY A LIGHT NORTHERLY FLOW
THIS WEEKEND...WITH ENHANCED DRAINAGE IN SOUTHWEST UTAH AT NIGHT.
LIGHTER NORTH FLOW ON SUNDAY WITH GRADUALLY SHIFT TO THE SOUTH ON
MONDAY. MOISTURE EXPECTED TO INCREASE TUESDAY AND WEDNESDAY WHICH
COULD RESULT IN SIGNIFICANT THUNDERSTORM COVERAGE AND HIGHER HUMIDITY
AGAIN.

&&

.AVIATION...TYPICAL WIND PATTERN EXPECTED AT SLC THIS EVENING WITH A
SWITCH TO DRAINAGE NEAR 03Z. HOWEVER...CONVECTION DEVELOPING FAR
WEST OF THE FIELD HAS A 20 PERCENT CHANCE OF PRODUCING GUSTY OUTFLOW
WINDS AFTER 00Z.

&&

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

&&

PUBLIC.........YOUNG
FIRE WEATHER...TARDY
AVIATION.......B. SMITH

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
430 AM MDT FRI JUL 27 2007

UTZ001>016-019>021-517-518-WYZ021-281200-
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-
430 AM MDT FRI JUL 27 2007

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN DEVELOP ACROSS
THE OUTLOOK AREA...AND BE MOST NUMEROUS ACROSS CENTRAL AND
SOUTHERN UTAH. HEAVY RAIN WILL BE POSSIBLE WITH THESE
STORMS...WHICH MAY LEAD TO ISOLATED INCIDENTS OF FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

DRIER AIR WILL GRADUALLY SPREAD ACROSS THE OUTLOOK AREA FROM NORTH
TO SOUTH OVER THE WEEKEND...RESULTING IN A DIMINISHING THREAT FOR
SHOWERS AND THUNDERSTORMS INTO EARLY NEXT WEEK. MOISTURE IS
EXPECTED TO INCREASE ACROSS THE OUTLOOK AREA DURING THE MIDDLE
PORTION OF THE UPCOMING WEEK...WHICH WILL INCREASE THE RISK FOR
HEAVY RAIN AND ISOLATED INCIDENTS OF FLASH FLOODING.

.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)