Severe Thunderstorm Warning 49, NWS Salt Lake City, UT

000 
WWUS55 KSLC 040057
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
656 PM MDT THU AUG 3 2006

UTC003-040106-
/O.EXP.KSLC.SV.W.0049.000000T0000Z-060804T0100Z/
BOX ELDER UT-
656 PM MDT THU AUG 3 2006

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BOX ELDER COUNTY
EXPIRES AT 700 PM MDT...

THE THUNDERSTORM THAT WAS SEVERE OVER CLEAR CREEK CAMPGROUND HAS 
WEAKENED RAPIDLY AS IT MOVES ACROSS CEDAR CREEK AND CROSS THE UTAH 
AND IDAHO STATE LINE.

LAT...LON 4199 11334 4187 11323 4199 11304 4199 11322

$$

GIBSON

AREA FORECAST DISCUSSION...CORRECTED AVIATION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
300 PM MDT THU AUG 3 2006

.SYNOPSIS...AN UPPER TROUGH ALONG THE CALIFORNIA COAST WILL KEEP A
SOUTHWESTERLY FLOW OVER THE AREA THROUGH THE WEEKEND AND INTO EARLY
NEXT WEEK. MOISTURE WILL REMAIN OVER MUCH OF THE REGION THE NEXT FEW
DAYS.

&&

.DISCUSSION...SHORT WAVE TROUGH LIFTING NORTHERN UTAH THIS AFTERNOON
AND WILL CONTINUE EAST INTO WYOMING THIS EVENING. CONVECTION
ORGANIZED AROUND THIS FEATURE WITH SOME FIRING OFF TERRAIN TO THE
SOUTH OF THE WAVE. SUBSIDENCE NOTED SOUTH OF I-80 NOW WHERE CUMULUS
GROWTH IS LESS...BUT ANOTHER WAVE IS EJECTING FROM SOUTHWEST UTAH.
THE NORTHERN SYSTEM EXITS THIS EVENING BUT DIFLUENCE REMAINS OVER
THE CENTRAL PART OF UTAH. ANOTHER SHORT WAVE TROUGH DEPICTED BY THE
NAM AND GFS RUNS WILL LIFT UP FROM THE SOUTHWEST...EJECTING FROM THE
MEAN UPPER TROUGH ON THE WEST COAST. THIS IS FORECAST TO TRACK
ACROSS WESTERN UTAH LATER TONIGHT. THUS ORGANIZED CONVECTION IN
NORTHEAST UTAH WILL EXIT TO THE NORTHEAST AND TERRAIN DRIVEN CELLS
OVER SOUTHERN AND CENTRAL UTAH WILL DISSIPATE...BUT ADDITIONAL
ACTIVITY SHOULD DEVELOP OVERNIGHT ASSOCIATED WITH THE NEXT
DISTURBANCE IN THE SOUTHWEST FLOW.

DEEPEST MOISTURE WILL BE GRADUALLY PUSHED TO THE IDAHO BORDER AND
EASTERN UTAH FRIDAY MORNING. TONIGHTS SHORT WAVE TROUGH HITS THE
WESTERLIES TO OUR NORTH AND TENDS TO SHEAR TO THE EAST ALONG THE
IDAHO BORDER AND SOUTHWEST WYOMING DURING FRIDAY MORNING...LINGERING
INTO THE AFTERNOON. DRYING AIR IS FORECAST TO FILTER INTO WESTERN
UTAH FRIDAY AFTERNOON...THOUGH THE MOISTURE GRADIENT IS SHARP WITH
SIGNIFICANT PW VALUES LINGERING OVER SOUTHEAST AND EASTERN UTAH.
MAIN CONVECTION WITH LOCALLY HEAVY RAIN WILL BE IN THESE
AREAS...WITH ANOTHER JET STREAK EXITING ACROSS EASTERN UTAH ON
FRIDAY.

UPPER HEIGHTS RISE ON SATURDAY ACROSS THE REGION. DEFORMATION AXIS
OVER CENTRAL UTAH WILL ALLOW FOR SCATTERED CONVECTION OVER CENTRAL
AND SOUTHERN AREAS FOR SATURDAY. RAIN WILL BE LOCALLY HEAVE AGAIN
WITH SLOW MOVING CELLS IN THE SOUTH. GATES PROGGED TO OPEN FOR MORE
SIGNIFICANT SURGE OF MOISTURE SATURDAY NIGHT AND SUNDAY...SPREADING
TO THE IDAHO BORDER. SHOULD BE AN ACTIVE DAY ON SUNDAY. STRONGER
TROUGH ON THE WEST COAST FORECAST TO LIFT INTO THE NORTHWEST EARLY
NEXT WEEK WHICH COULD BRING A DRIER SOUTHWEST FLOW OVER THE GREAT
BASIN AND GRADUAL WARMING TREND NEXT WEEK. CURRENT TIMING WOULD HAVE
THE SIGNIFICANT DRYING ON TUESDAY.

&&

.AVIATION...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO CONTINUE
DEVELOPING OVER THE OQUIRRHS AND SOUTH OF KSLC THROUGH THIS EVENING.
THIS WILL RESULT IN THUNDERSTORMS PERIODICALLY IMPACTING THE KSLC
TERMINAL THROUGH THIS EVENING BUT CIGS ARE LIKELY TO STAY ABOVE
6000FT AGL EXCEPT IN THE HEAVIER SHOWERS. WINDS WILL BE
PREDOMINANTLY NORTHERLY THROUGH 2200Z IN THE WAKE OF THE PASSING
THUNDERSTORMS...BUT THERE IS A 20 PERCENT CHANCE THAT SHOWERS MOVING
IN FROM THE SOUTH COULD TURN WINDS BACK TO SOUTHERLY BEFORE 0000Z.

&&

.FIRE WEATHER...MOISTURE REMAINS OVER THE AREA AS A RESULT
OF SOUTHERLY FLOW...AND SCATTERED SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO PERSIST...WETTING RAINS FOR EASTERN AND SOUTHERN AREAS
FRIDAY AND SATURDAY. DRIER AIR MASS ACROSS WESTERN UTAH ON FRIDAY
WILL DECREASE CONVECTION AND LOWER HUMIDITY. A TROUGH DEVELOPS OFF
THE CALIFORNIA COAST THIS WEEKEND. INCREASED COVERAGE EXPECTED ON
SUNDAY WHICH COULD LINGER INTO MONDAY AS MOISTURE SURGES NORTHWARD.

&&

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

&&

TARDY

AVIATION...CHENG

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
520 AM MDT THU AUG 3 2006

UTZ001>021-WYZ021-041200-
CACHE VALLEY/UTAH PORTION-CASTLE COUNTRY-
CENTRAL AND SOUTHWEST MOUNTAINS-
GLEN CANYON RECREATION AREA/LAKE POWELL-
GREAT SALT LAKE DESERT AND MOUNTAINS-HENRY MOUNTAINS-
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-SAN RAFAEL SWELL-
SANPETE/SEVIER VALLEYS-SOUTH CENTRAL UTAH-SOUTHERN WASATCH FRONT-
SOUTHWEST UTAH-SOUTHWEST WYOMING-UTAHS DIXIE AND ZION NATIONAL PARK-
WASATCH MOUNTAIN VALLEYS-WASATCH MOUNTAINS I-80 NORTH-
WASATCH MOUNTAINS SOUTH OF I-80-WASATCH PLATEAU/BOOK CLIFFS-
WEST CENTRAL UTAH-WESTERN UINTA BASIN-WESTERN UINTA MOUNTAINS-
520 AM MDT THU AUG 3 2006

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

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED OVER MOST OF THE
AREA FRIDAY THROUGH THE WEEKEND...MAINLY IN THE AFTERNOONS AND
EVENINGS. SOME OF THESE COULD BRING LOCALLY HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS SHOULD REPORT SIGNIFICANT WEATHER ACCORDING TO STANDARD
OPERATING PROCEDURES.