Severe Thunderstorm Warning 36, NWS Salt Lake City, UT

000 
WWUS55 KSLC 200104
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
703 PM MDT WED JUL 19 2006

UTC003-045-200115-
/O.CON.KSLC.SV.W.0036.000000T0000Z-060720T0115Z/
TOOELE UT-BOX ELDER UT-
703 PM MDT WED JUL 19 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR SOUTH CENTRAL BOX ELDER AND NORTH CENTRAL TOOELE COUNTIES...

AT 659 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER NORTH CENTRAL TOOELE
COUNTY...OR ABOUT 33 MILES NORTHWEST OF GRANTSVILLE...MOVING NORTH AT
10 MPH.

THIS STORM IS CROSSING I-80 NEAR GRASSY AND CAN PRODUCE VERY LOW 
VISIBILITY IN HEAVY RAIN AND WIND. MOTORISTS ON I-80 SHOULD EXERCISE 
EXTREME CAUTION IF NEAR THIS STORM. 

LAT...LON 4069 11314 4061 11293 4098 11266 4107 11305

$$

BAS

000 
WWUS55 KSLC 200117
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
716 PM MDT WED JUL 19 2006

UTC003-045-200126-
/O.EXP.KSLC.SV.W.0036.000000T0000Z-060720T0115Z/
TOOELE UT-BOX ELDER UT-
716 PM MDT WED JUL 19 2006

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BOX ELDER AND
NORTH CENTRAL TOOELE COUNTIES EXPIRES AT 715 PM MDT...

THE THUNDERSTORMS HAS DECREASED TO BELOW SEVERE LEVELS. STRONG WINDS 
AND HEAVY RAINS ARE STILL POSSIBLE THROUGH 745 PM ALONG I-80 BETWEEN 
GRASSY KNOLL AND DELLE. 

LAT...LON 4069 11314 4061 11293 4098 11266 4107 11305

$$

BAS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
310 PM MDT WED JUL 19 2006

.SYNOPSIS...A VERY MOIST AIRMASS WILL BE OVER THE AREA THROUGH THIS
EVENING. A RIDGE OF HIGH PRESSURE WILL BUILD TO THE WEST OF THE AREA
BEGINNING THURSDAY BRINGING DRIER AIR INTO THE REGION FROM THE NORTH
LATE THURSDAY AND INTO THE WEEKEND. MOISTURE WILL REMAIN OVER THE
SOUTH THROUGH THE PERIOD.

&&

.DISCUSSION...APPEARS AN EMBEDDED WAVE IS RESPONSIBLE FOR THE
CONVECTION OVER SOUTHWEST UTAH THIS AFTERNOON. THIS FEATURE NOT
CAPTURED WELL BY MODELS BUT IT WILL LIKELY CONTINUE NORTHEAST AND BE
OVER CENTRAL UT THIS EVENING. SHOULD CONTINUE TO PRODUCE WIDESPREAD
LIGHT TO MODERATE RAIN AND LOTS OF LIGHTNING AS IT MOVES OVER THE
NORTHERN WASATCH PLATEAU THIS EVENING.  ELSEWHERE SUNSHINE AND
TERRAIN ARE COMBINING TO PRODUCE WIDESPREAD CONVECTION. THIS WILL
CONTINUE AND SPREAD TO THE VALLEYS LATE THIS AFTERNOON AND INTO THE
EVENING AS MOUNTAIN/VALLEY CIRCULATIONS REVERSE. EXPECT VIRTUALLY
THE ENTIRE FORECAST AREA TO EVENTUALLY SEE AT LEAST SPRINKLES WITH
SOME HEAVY RAIN NEAR THE THUNDERSTORM CORES.

PATTERN CHANGE STILL ON TAP BEGINNING THURSDAY WITH UPPER RIDGE AXIS
BECOMING REESTABLISHED WEST OF THE FORECAST AREA AND EVENTUALLY
FORMING A CLOSED 500 MB HIGH CIRCULATION OVER NE NV BY THURSDAY
NIGHT. RESULT IS A SWITCH TO A NORTHERLY AND EVEN NORTHEASTERLY
FLOW. THIS WILL BRING DRIER AND MORE STABLE AIR INTO THE AREA. GFS
DRIES THE ENTIRE AREA BUT NAM NEVER QUITE DRIES OUT THE SOUTH.
PREFER THE SLOWER DRYING OF THE NAM AS TYPICAL MODEL ERROR IS TO BE
TOO AGRESSIVE IN DRYING DURING THE SUMMER MONSOON. EVEN THOUGH SOME
MOISTURE REMAINS...500 MB TEMPS FORECAST TO RISE TO MINUS 4 OR EVEN
WARMER...SO AIRMASS WILL BECOME TOO STABLE TO SUPPORT DEEP
CONVECTION. BOTTOM LINE IS AFTER STORMS TODAY...TREND IS FOR LESS
ACTIVITY EACH DAY WITH TEMPERATURES WARMING BACK UP TOWARDS RECORD
LEVELS OVER THE WEEKEND AND INTO NEXT WEEK.

&&

.AVIATION...NORTHWEST LAKE BREEZE SHOULD CONTINUE FOR A FEW HOURS.
PROBLEM WILL BE SCATTERED THUNDERSTORMS AT KSLC THIS AFTERNOON AND
EVENING UNTIL AROUND 03Z. ANY PASSING STORMS MAY PRODUCE SUDDEN
VARIABLE OUTFLOW WIND GUSTS OVER 25 KNOTS THAT WILL DISRUPT THE LAKE
BREEZE. LOCAL SOUTHEAST DRAINAGE PATTERN SHOULD SET UP AROUND 03Z.

&&

.FIRE WEATHER...VERY MOIST AIRMASS OVER THE FIRE DISTRICT THIS
EVENING WILL GRADUALLY BE REPLACED BY DRIER AIR AS THE FLOW ALOFT
BECOMES NORTHERLY DUE TO THE RIDGE MOVING WESTWARD. THE NORTH WILL
BEGIN DRYING ON THURSDAY THE CENTRAL PORTIONS BY FRIDAY AFTERNOON
AND THE SOUTH NOT UNTIL SUNDAY. RECORD CHALLENGING HEAT WILL RETURN
FOR SUNDAY INTO TUESDAY BEFORE SOME MOISTURE RETURNS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...RED FLAG WARNING NOON UNTIL 10 PM TODAY
     UTZ420-421-422-423-425-426

WY...NONE.

&&

DUNN/YOUNG/STRUTHWOLF

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
442 AM MDT WED JUL 19 2006

UTZ001>021-WYZ021-201200-
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-
442 AM MDT WED JUL 19 2006

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

.DAY ONE...TODAY AND TONIGHT

NUMEROUS THUNDERSTORMS WILL OCCUR TODAY. THUNDERSTORMS
ACROSS THE REGION WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY
RAINFALL AND GUSTY WINDS. THUNDERSTORMS IN FAR NORTHERN UTAH WILL
BRING HAZARDOUS FIRE WEATHER CONDITIONS. REFER TO FIRE WEATHER
PRODUCTS FOR MORE DETAILS. THUNDERSTORMS ALONG AND SOUTH OF I-80
COULD PRODUCE LOCALIZED FLASH FLOODING TODAY.

.DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY

SCATTERED THUNDERSTORMS WILL OCCUR ON THURSDAY. THESE STORMS WILL
HAVE LOCALLY HEAVY RAINFALL ACROSS EASTERN AND SOUTHERN UTAH.

ISOLATED THUNDERSTORMS WILL PERSIST ACROSS SOUTHERN AND FAR EASTERN
UTAH FROM FRIDAY INTO THE WEEKEND. VERY HOT TEMPERATURES WILL RETURN
TO THE THE AREA WITH AFTERNOON READINGS AROUND THE CENTURY MARK IN
THE NORTHERN VALLEYS AND NEAR 110 IN DIXIE AND SOUTHEAST UTAH.
MOISTURE AND ASSOCIATED THUNDERSTORMS MAY INCREASE OVER CENTRAL AND
NORTHERN UTAH EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE REQUESTED TO REPORT ANY SIGNIFICANT WEATHER ACCORDING
TO STANDARD OPERATING PROCEDURES.

TARDY