Special Weather Statement, NWS Salt Lake City, UT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1031 AM MDT THU AUG 8 2013

.SYNOPSIS...WITH A LOW PRESSURE SYSTEM OVER THE WEST COAST AND A
RIDGE OF HIGH PRESSURE OVER THE SOUTHERN PLAINS...A SOMEWHAT DRIER
SOUTHERLY FLOW CAN BE EXPECTED THROUGH THE WEEKEND FOR ALL BUT THE
EASTERN SECTIONS OF UTAH...WHERE SOME MOISTURE WILL REMAIN IN
PLACE.

&&

.DISCUSSION...DRIER AIR IS MOVING INTO THE FORECAST AREA FROM
THE SOUTHWEST AND WILL CONTINUE TO MOVE NORTHEAST THROUGH THE DAY.
AN AXIS OF MOISTURE EXISTS ACROSS THE STATE...STRETCHING FROM
APPROXIMATELY WENDOVER SOUTHEAST THROUGH BULLFROG. EXPECT THAT
CONVECTION WILL DEVELOP OVER THE HIGHER TERRAIN OF EASTERN AND
PORTIONS OF NORTHERN UTAH THIS AFTERNOON. CLOUD COVER ACROSS THE
NORTHEASTERN HALF OF THE STATE THIS MORNING MAY DELAY ONSET OF
CONVECTION. THE SPC MESOSCALE ANALYSIS SHOWS AN AREA OF CIN
COINCIDENT WITH THE CLOUD COVER. EXPECT THAT AS CLOUD COVER
DIMINISHES INTO THIS AFTERNOON...CONVECTION WILL BEGIN TO DEVELOP
OVER THE HIGHER TERRAIN. HOWEVER...DRY AIR MOVING NORTHEASTWARD
WILL LIMIT DURATION OF CONVECTION...AND EXPECTED THAT ACTIVITY
WILL DECREASE EARLY THIS EVENING. THE HRRR SUPPORTS THIS
IDEA...SHOWING CONVECTION SHUTTING OFF AROUND 01Z.

DRY AIR WILL CONTINUE TO ADVANCE TO THE NORTHEAST...WITH DRY
CONDITIONS ACROSS THE MAJORITY OF THE CWA BY TOMORROW AFTERNOON.
WITH THESE DRY CONDITIONS AND THE POTENTIAL FOR GUSTY WINDS
ACROSS THE WEST DESERTS...THERE IS THE CONCERN THAT CRITICAL FIRE
WEATHER CONDITIONS MAY DEVELOP. SEE THE FIRE WEATHER DISCUSSION
FOR MORE DETAILS.

MOISTURE WILL SNEAK BACK INTO EASTERN UTAH EARLY NEXT WEEK...AS
HIGH PRESSURE BUILDS INTO EASTERN UTAH. HOWEVER...NO STRONG
MOISTURE SURGE IS EXPECTED IN THE NEXT 7 DAYS.

UPDATED THE FORECAST THIS MORNING TO INCREASE POPS ACROSS THE
HIGHER TERRAIN OF EASTERN AND EXTREME NORTHERN UTAH.

&&

.AVIATION...SOUTHERLY WINDS WILL CONTINUE AT THE SLC TERMINAL
THROUGH THE MORNING HOURS. THERE IS A 60 PERCENT CHANCE WINDS WILL
REMAIN SOUTHERLY THROUGHOUT THE DAY...WITH AN ABSENCE OF THE TYPICAL
NORTHWEST WIND SHIFT.

&&

.FIRE WEATHER...DRIER CONDITIONS WILL BUILD INTO THE DISTRICT TODAY.
A DISTURBANCE MOVING ACROSS THE STATE WILL BRING THE THREAT OF A FEW
DRY THUNDERSTORMS ACROSS PORTIONS OF NORTHERN AND EASTERN UTAH THIS
AFTERNOON AND EVENING. ANOTHER DISTURBANCE APPROACHING THE NORTHERN
CALIFORNIA COAST WILL BRING ENHANCED WINDS TO THE WESTERN VALLEYS
FRIDAY AND SATURDAY. THESE WINDS...ALONG WITH LOW HUMIDITIES...WILL
BRING THE THREAT OF CRITICAL FIRE WEATHER CONDITIONS TO THE WESTERN
VALLEYS BOTH FRIDAY AND SATURDAY. A FIRE WEATHER WATCH HAS BEEN
ISSUED FOR THESE LOCATIONS FOR BOTH DAYS. DRY CONDITIONS WILL
CONTINUE ACROSS MUCH OF THE DISTRICT INTO EARLY NEXT WEEK. THE MAIN
EXCEPTION MAY BE SOUTHEASTERN UTAH...WHERE ENOUGH MOISTURE MAY
REMAIN IN PLACE TO BRING A THREAT OF MAINLY DRY THUNDERSTORMS THIS
WEEKEND.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FIRE WEATHER WATCH FROM FRIDAY AFTERNOON THROUGH SATURDAY
     EVENING FOR UTZ478-492-495.

WY...NONE.
&&

PUBLIC...HOSENFELD
FIRE WEATHER/AVIATION...MERRILL

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
423 AM MDT THU AUG 8 2013

UTZ001>016-019>021-517-518-WYZ021-091030-
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-
423 AM MDT THU AUG 8 2013

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS CAN BE EXPECTED THIS AFTERNOON AND EVENING
OVER THE EASTERN SECTIONS OF THE FORECAST AREA...AS WELL AS OVER
THE NORTHWEST CORNER OF UTAH. THE STORMS MAY PRODUCE GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE PRIMARY CONCERN FOR FRIDAY THROUGH WEDNESDAY WILL BE FOR
CRITICAL FIRE WEATHER CONDITIONS OVER THE WESTERN SECTIONS OF
UTAH AS GUSTY SOUTH WINDS COMBINE WITH LOW HUMIDITIES.

.SPOTTER INFORMATION STATEMENT...

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

BARJENBRUCH

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

FOR INFORMATION ON POTENTIAL TRAVEL IMPACTS VISIT...
HTTP://WWW.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX

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