Severe Thunderstorm Warning 98, NWS Salt Lake City, UT

000 
WWUS55 KSLC 152333
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
530 PM MDT FRI SEP 15 2006

UTC007-013-160000-
/O.CON.KSLC.SV.W.0098.000000T0000Z-060916T0000Z/
CARBON UT-DUCHESNE UT-
530 PM MDT FRI SEP 15 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR SOUTHEASTERN DUCHESNE AND NORTHEASTERN CARBON COUNTIES...

AT 525 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED 8 MILES SOUTH OF MYTON...OR ABOUT 16 MILES SOUTH OF 
ROOSEVELT...MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MYTON BY 535 PM MDT

ADDITIONAL THUNDERSTORMS CAPABLE OF PRODUCING HAIL TO THE SIZE OF 
NICKELS WERE LOCATED ACROSS THE BOOK CLIFFS...20 MILES NORTHEAST OF 
WELLINGTON. THESE STORMS WERE ALSO MOVING NORTHEAST AT 30 MPH...AND 
WILL IMPACT RURAL AREAS OF NORTHEASTERN CARBON AND SOUTHEASTERN 
DUCHESNE COUNTIES THROUGH 600 PM MDT.  

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FRIDAY
EVENING FOR CARBON AND DUCHESNE COUNTIES IN UTAH.

LAT...LON 3981 11059 3966 11050 3970 10998 4027 10999

$$

SEAMAN

000 
WWUS55 KSLC 152358
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
556 PM MDT FRI SEP 15 2006

UTC007-013-160006-
/O.EXP.KSLC.SV.W.0098.000000T0000Z-060916T0000Z/
CARBON UT-DUCHESNE UT-
556 PM MDT FRI SEP 15 2006

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DUCHESNE AND
NORTHEASTERN CARBON COUNTIES EXPIRES AT 600 PM MDT...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING
HAS BEEN ALLOWED TO EXPIRE. STRONG THUNDERSTORMS CAPABLE OF 
PRODUCING HAIL TO THE SIZE OF DIMES WILL CONTINUE TO IMPACT RURAL 
CARBON COUNTY THROUGH 7 PM. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT FRIDAY
EVENING FOR CARBON AND DUCHESNE COUNTIES. 

LAT...LON 3981 11059 3966 11050 3970 10998 4027 10999

$$

SEAMAN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
449 PM MDT FRI SEP 15 2006

.SYNOPSIS...A COLD PACIFIC STORM SYSTEM WITH ABUNDANT MOISTURE
WILL MOVE THROUGH THE STATE THROUGH TOMORROW. HIGH PRESSURE ALOFT
WILL RETURN EARLY NEXT WEEK.

&&

.DISCUSSION...SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS
SOUTHWESTERN WYOMING AND THE NORTHERN HALF OF UTAH THIS AFTERNOON
AHEAD OF THE STRONG PACIFIC STORM SYSTEM WHICH IS ENTERING
WESTERN UTAH AT THIS TIME. THE STORMS WILL CONTINUE DEVELOP INTO
THIS EVENING...AND SOME COULD PRODUCE LARGE HAIL AND DAMAGING
WINDS. SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM FOR
MUCH OF UTAH.

SURFACE FRONT STRETCHES FROM THE CA/NV BORDER TO SALT LAKE CITY
TO BIG PINEY WY. THE UPPER LEVEL SUPPORT ASSOCIATED WITH THE COLD
FRONT WILL MOVE INTO NORTHERN UTAH WITHIN THE NEXT FEW
HOURS...PUSHING DOWN TO THE UT/AZ BORDER BY SATURDAY MORNING.
WINDS HAVE PICKED UP SIGNIFICANTLY ACROSS THE
STATE...PARTICULARLY IN SOUTHWESTERN UTAH WHERE A HIGH WIND
WARNING HAS BEEN ISSUED UNTIL 9 PM. WINDS ARE EXPECTED TO
DECREASE TO BELOW WARNING/ADVISORY CRITERIA AS THE FRONT PASSES
THROUGH. TEMPERATURES WILL DROP SIGNIFICANTLY BEHIND THE
FRONT...WITH 700 MB TEMPERATURES DROPPING INTO THE -4 TO -6C
RANGE IN NORTHERN UTAH. HIGH TEMPERATURES ALONG THE WASATCH FRONT
TOMORROW WILL BE 20 TO 25F COOLER THAN THEY WERE YESTERDAY...AND
HIGH TEMPERATURES 10 DEGREES COOLER WILL REACH AS FAR SOUTH AS
ST. GEORGE.

SNOW LEVELS WILL DROP TO AROUND 8000 FT OVER NORTHERN UTAH AS THE
FRONT PASSES...AND SOME HIGHER ELEVATION LOCATIONS WILL SEE 4 TO
6 INCH ACCUMULATIONS TONIGHT INTO SATURDAY MORNING. PRECIPITATION
WILL BE ALL RAIN IN THE VALLEYS...THOUGH THE BENCHES COULD SEE
RAIN MIX WITH SNOW IN HEAVIER PRECIPITATION. PRECIPITATION IN THE
VALLEYS WILL MOSTLY TAPER OFF BY MIDNIGHT WITH THE PASSAGE OF THE
FRONT...THOUGH SOME SHOWERS MAY LINGER INTO SATURDAY MORNING. GSL
TEMPERATURE FROM THE LATEST AVHRR IMAGE IS ABOUT 17C. WITH COLD
AIR MOVING INTO PLACE...THREAT EXISTS FOR LAKE EFFECT BANDING
SATURDAY MORNING. PRECIPITATION WILL STICK AROUND A BIT LONGER IN
THE MOUNTAINS...AND SOME SHOWERS COULD LINGER INTO SUNDAY
MORNING.

A WEAK RIDGE BUILDS OVER THE AREA BEGINNING SUNDAY AS THE STORM
SYSTEM EXITS THE AREA...AND THIS SHOULD STICK AROUND UNTIL
TUESDAY BEFORE THE NEXT TROUGH APPROACHES THE AREA. MODELS
INDICATE THAT THIS MAY PASS A COLD FRONT AS FAR SOUTH AS NORTHERN
UTAH ON WEDNESDAY ALONG WITH SOME PRECIPITATION...BUT IT MAY
REMAIN TOO FAR NORTH TO PRODUCE ANY SIGNIFICANT EFFECTS IN THE
CWA. THIS FAR OUT...THERE IS A GREAT DEAL OF UNCERTAINTY WITH
RESPECT TO THE SYSTEM AND SO FAR HAVE ONLY ADDED ISOLATED POPS TO
THE NORTHERN MOUNTAINS.

&&

.AVIATION...IFR CONDITIONS WILL BE LIKELY BETWEEN 23 AND 01Z DUE TO
PERIODS OF HEAVY RAIN AND AN ISOLATED THUNDERSTORM. THE MID LEVEL
TROUGH AXIS WILL MOVE THROUGH BY 03Z BUT THE COLD POCKET AT UPPER
LEVELS WILL NOT MOVE THROUGH UNTIL LATE SATURDAY MORNING. THEREFORE
THE THREAT OF SHOWERS WILL CONTINUE DUE TO POSSIBLE LAKE EFFECT OFF
OF THE GREAT SALT LAKE. THERE IS ABOUT A 40 PERCENT POSSIBILITY OF
SHOWERS AFFECTING THE AIRPORT THROUGH SATURDAY MORNING.

&&

.FIRE WEATHER...STRONG WINDS ARE OCCURRING OVER MUCH OF THE
FORECAST AREA...WITH SEVERE FIRE WEATHER CONDITIONS BEING REPORTED
IN PARTS OF EXTREME SOUTHWEST UTAH. RED FLAG WARNING REMAINS IN
EFFECT UNTIL MIDNIGHT IN THE VICINITY OF UTAHS DIXIE. BEHIND THE
COLD FRONT...RELATIVE HUMIDITIES WILL RISE ABOVE CRITICAL LEVELS
AS WINDS SHIFT TO THE NORTH AND DECREASES.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HIGH WIND WARNING UNTIL 9 PM FRIDAY FOR UTZ016-UTZ017-UTZ019.

     RED FLAG WARNING UNTIL MIDNIGHT SATURDAY FOR UTZ439.

     SEVERE THUNDERSTORM WATCH UNTIL 8 PM FRIDAY FOR UTZ003-UTZ004-
     UTZ006-UTZ008-UTZ009>015-UTZ017-UTZ018-UTZ021.

     SNOW ADVISORY UNTIL 6 AM SATURDAY FOR UTZ007>009.

     WIND ADVISORY UNTIL 10 PM FRIDAY FOR UTZ013>015-UTZ018-
     UTZ020-UTZ021.

WY...NONE.

&&

PUBLIC/FIRE WX...TRAPHAGAN/HALL
AVIATION...STRUTHWOLF

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1127 AM MDT FRI SEP 15 2006

UTZ001>006-010>012-WYZ021-161730-
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 PLATEAU/BOOK CLIFFS-WESTERN UINTA BASIN-CASTLE COUNTRY-
SOUTHWEST WYOMING-
1127 AM MDT FRI SEP 15 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH...
NORTHERN UTAH AND SOUTHWEST WYOMING.

.DAY ONE...TODAY AND TONIGHT

AN UNSEASONABLY COLD AIRMASS ASSOCIATED WITH A PACIFIC STORM
SYSTEM WILL MOVE OVER THE AREA LATER THIS AFTERNOON. WINDS WILL
INCREASE LATE THIS MORNING AND BRING BREEZY TO WINDY CONDITIONS TO
THE AREA AHEAD OF A COLD FRONT. A MOIST AIRMASS WILL CONTINUE TO
MOVE OVER THE AREA BRINGING ADDITIONAL PRECIPITATION TO THE AREA THIS
AFTERNOON AND TONIGHT. THE NORTHERN MOUNTAINS OF UTAH WILL ALSO SEE
ITS FIRST SNOWFALL OF THE SEASON TONIGHT. RAIN MAY MIX WITH SNOW DOWN
TO 6000 FEET.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

WIDESPREAD PRECIPITATION WILL CONTINUE OVER THE AREA THROUGH EARLY
SATURDAY. MUCH COLDER TEMPERATURES WILL SPREAD ACROSS ALL OF
NORTHERN UTAH AND SOUTHWEST WYOMING FOR SATURDAY. PARTIAL CLEARING
SATURDAY NIGHT COULD BRING AREAS OF FROST ON SUNDAY MORNING.

DRIER AND MILDER CONDITIONS WILL RETURN FOR THE EARLY PART OF NEXT
WEEK. ADDITIONAL PRECIPITATION AND COOLER TEMPERATURES COULD
AFFECT THE AREA AGAIN FOR THE MIDDLE PART OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
ACCORDING TO STANDARD OPERATING PROCEDURES.

UTZ007>009-161730-
WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80-
WESTERN UINTA MOUNTAINS-
1127 AM MDT FRI SEP 15 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN UTAH.

.DAY ONE...TODAY AND TONIGHT

AN UNSEASONABLY COLD AIRMASS ASSOCIATED WITH A PACIFIC STORM
SYSTEM WILL MOVE OVER THE AREA LATER THIS AFTERNOON AND BRING THE
FIRST SNOWFALL OF THE SEASON TO THE NORTHERN MOUNTAINS. WINDS WILL
INCREASE LATE THIS MORNING AND BRING BREEZY TO WINDY CONDITIONS TO
THE AREA AHEAD OF A COLD FRONT. A MOIST AIRMASS WILL CONTINUE TO
MOVE OVER THE AREA BRINGING ADDITIONAL PRECIPITATION TO THE AREA
THIS AFTERNOON AND TONIGHT. TOTAL SNOWFALL ACCUMULATIONS WILL
GENERALLY BE 2 TO 6 INCHES IN MOST AREAS...BUT LOCALLY HIGHER
AMOUNTS CAN BE EXPECTED ESPECIALLY ON THE WESTERN-FACING SLOPES.
RAIN MAY MIX WITH SNOW DOWN 6000 FEET.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

WIDESPREAD PRECIPITATION WILL CONTINUE OVER THE AREA THROUGH EARLY
SATURDAY. MUCH COLDER TEMPERATURES WILL SPREAD ACROSS ALL OF
NORTHERN UTAH FOR SATURDAY. PARTIAL CLEARING SATURDAY NIGHT COULD
BRING AREAS OF FROST ON SUNDAY MORNING.

DRIER AND MILDER CONDITIONS WILL RETURN FOR THE EARLY PART OF NEXT
WEEK. ADDITIONAL PRECIPITATION AND COOLER TEMPERATURES COULD
AFFECT THE AREA AGAIN FOR THE MIDDLE PART OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
ACCORDING TO STANDARD OPERATING PROCEDURES.

UTZ013>021-161730-
SAN RAFAEL SWELL-SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-
SOUTHWEST UTAH-CENTRAL AND SOUTHWEST MOUNTAINS-HENRY MOUNTAINS-
UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH-
GLEN CANYON RECREATION AREA/LAKE POWELL-
1127 AM MDT FRI SEP 15 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UTAH
AND SOUTHERN UTAH.

.DAY ONE...TODAY AND TONIGHT

AN UNSEASONABLY COLD AIRMASS ASSOCIATED WITH A PACIFIC STORM
SYSTEM WILL MOVE OVER THE AREA LATER THIS AFTERNOON. WINDS WILL
INCREASE LATE THIS MORNING AND BRING WINDY CONDITIONS TO THE AREA
AHEAD OF A COLD FRONT. SOUTH TO SOUTHWEST WINDS OF 25 TO 35 MPH
WITH GUSTS TO NEAR 45 MPH WILL DEVELOP OVER THE VALLEYS TODAY WITH
SOUTH TO SOUTHWEST WINDS OF 35 TO 45 MPH WITH GUSTS TO NEAR 60 MPH
DEVELOPING LATE THIS MORNING. ALSO...THE NORTHERN MOUNTAINS OF
UTAH WILL SEE ITS FIRST SNOWFALL OF THE SEASON TONIGHT AS WELL
WITH RAIN AND SNOW MIXING DOWN TO 6000 FEET.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE COLD FRONT WILL SWEEP SOUTH ACROSS SOUTHERN UTAH SATURDAY.
COLDER TEMPERATURES WILL FOLLOW THE FRONT SOUTH...ALONG WITH
SPOTTY SHOWERS AND THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
ACCORDING TO STANDARD OPERATING PROCEDURES.

HALL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
411 PM MDT FRI SEP 15 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     HAIL             3 NW PRICE              39.63N 110.84W
09/15/2006  E0.75 INCH       CARBON             UT   TRAINED SPOTTER

&&

RGRAHAM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
456 PM MDT FRI SEP 15 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 PM     HAIL             MYTON                   40.19N 110.06W
09/15/2006  E0.75 INCH       DUCHESNE           UT   PUBLIC

&&

RGRAHAM