Severe Thunderstorm Warning 36, NWS Salt Lake City, UT

791 
WWUS55 KSLC 212248
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
448 PM MDT SUN SEP 21 2014

UTC017-025-212300-
/O.CON.KSLC.SV.W.0036.000000T0000Z-140921T2300Z/
GARFIELD UT-KANE UT-
448 PM MDT SUN SEP 21 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR SOUTHWESTERN GARFIELD AND NORTHWESTERN KANE COUNTIES...

AT 446 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR HENRIEVILLE...OR 25 MILES SOUTHWEST
OF ESCALANTE...MOVING NORTH AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
HENRIEVILLE...BRYCE CANYON NATIONAL PARK...TROPIC...CANNONVILLE...
KODACHROME BASIN STATE PARK AND RUBYS INN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH
AND/OR LARGE HAIL AT LEAST ONE INCH IN DIAMETER. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM.  MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 3748 11196 3750 11217 3789 11226 3789 11173
TIME...MOT...LOC 2246Z 189DEG 23KT 3760 11202 

$$

LV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
412 PM MDT SUN SEP 21 2014

.SYNOPSIS...AN UPPER LOW WILL LIFT NORTHEAST ACROSS THE GREAT
BASIN TODAY THROUGH TONIGHT THEN MOVE OFF TO THE NORTHEAST
MONDAY. HIGH PRESSURE WILL FOLLOW FOR MID WEEK.

&&

.DISCUSSION...A LOW PRESSURE SYSTEM NUDGED NORTHEAST TODAY THROUGH
THE GREAT BASIN...USHERING A VERY MOIST AIRMASS FROM SOUTHERN
THROUGH NORTHERN UTAH. MANY AREAS SAW PRECIPITATION AMOUNTS NEAR
AN INCH...WITH RADAR ESTIMATES ABOVE AN INCH IN SEVERAL SOUTHERN
AND CENTRAL LOCALES. THOUGH ISOLATED CONVECTION PLAGUED THE
SOUTHERN THIRD OF UTAH EARLIER TODAY...SUFFICIENT CLOUD COVER
REMAINED ACROSS THE STATE TO SUPPRESS CONVECTIVE ACTIVITY IN MOST
OF THE STATE THIS AFTERNOON. MOST PRECIP AS WELL AS THE ISOLATED
THUNDERSTORMS CURRENTLY POPPING IN SOUTHERN UTAH SHOULD DIMINISH
AFTER SUNSET THIS EVENING...WITH SOME LINGERING ACTIVITY STREAMING
NORTHEAST FROM NEVADA ACROSS THE WEST DESERT.

THE LOW WILL SHIFT EASTWARD ON MONDAY...MAINTAINING A MOIST
BOUNDARY LAYER AND PROMOTING LINGERING SHOWERS IN NE UTAH.
EXPECTING SHOWERS TO REGENERATE ACROSS THE NORTH AS THE LOW PASSES
THROUGH UTAH...WITH ENOUGH DYNAMICS TO SUPPORT ISOLATED
THUNDERSTORMS OVER THE HIGHER TERRAIN.

THE ACTION QUIETS DOWN BY MONDAY EVENING AS A HIGH PRESSURE RIDGE
MOVES IN AND AMPLIFIES THROUGH MIDWEEK...RAMPING TEMPERATURES BACK
ABOVE CLIMO STATEWIDE. MODELS AGREE ON THE PRESENCE OF A DEEP LOW
MAKING ITS APPROACH TOWARD UTAH THURSDAY INTO THE EARLY WEEKEND...THOUGH
TIMING AS WELL AS EXTENT OF PRECIP AND COOLING REMAIN DISPARATE.
HAVE LEANED TOWARD THE SLIGHTLY WARMER AND QUICKER GFS SOLUTION
AT THIS POINT. WINDS ARE EXPECTED TO INCREASE SIGNIFICANTLY
THURSDAY INTO FRIDAY AHEAD OF A SIGNIFICANT COLD FRONT.

&&

.AVIATION...WINDS AT KSLC ARE EXPECTED TO REMAIN PREDOMINANTLY
SOUTHERLY THROUGH THE EVENING...BUT MAY BE INFLUENCED BY OUTFLOW AT
TIMES FROM PASSING SHOWERS RESULTING IN VARIABLE WIND DIRECTIONS.
OCCASIONAL SHOWERS...WITH A 30 PERCENT OF A THUNDERSTORM...WILL
CONTINUE TO IMPACT THE TERMINAL THROUGH THE EVENING...WITH THE MOST
LIKELY TIMEFRAME COMING BETWEEN 01-06Z. BRIEF MVFR CONDITIONS WILL
BE POSSIBLE WITH THE HEAVIEST SHOWERS.

&&

.FIRE WEATHER...WITH DEEP MOISTURE IN PLACE...THE REMINDER OF TODAY
WILL BE THE MOST WIDESPREAD CHANCE OF RAINFALL AS A WEAKENING STORM
SYSTEM CROSSES THE EASTERN GREAT BASIN. LOCALLY HEAVY RAINFALL AND
COPIOUS LIGHTNING ARE EXPECTED. THIS PATTERN WILL BRING EXPANSIVE
CLOUD COVER...RAISING HUMIDITY LEVELS AND COOLING TEMPERATURES.
CONVECTION LINGERS TOMORROW ACROSS THE NORTH AND EAST...DECAYING FOR
GOOD TOMORROW EVENING.

A WARMING AND DRYING TREND WILL BEGIN TOMORROW ACROSS THE SOUTHWEST
AND BE IN PLACE ACROSS THE ENTIRE REGION THROUGH MID WEEK AS A RIDGE
OF HIGH PRESSURE AMPLIFIES OVERHEAD.

THERE REMAINS UNCERTAINTY REGARDING THE TIMING OF A STRONG COLD
FRONT LATE IN THE WEEK. CRITICAL FIRE WEATHER CONDITIONS WILL BE
POSSIBLE AHEAD OF THE COLD FRONT WITH STRONG GUSTY SOUTH WINDS
DEVELOPING...BEFORE CONVECTIVE CHANCES ONCE AGAIN INCREASE NEXT
WEEKEND.

&&

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

PUBLIC...VERZELLA
FIRE WEATHER...ROGOWSKI
AVIATION...SEAMAN

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
527 AM MDT SUN SEP 21 2014

UTZ001>016-019>021-517-518-WYZ021-221200-
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-
527 AM MDT SUN SEP 21 2014

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL BE FAIRLY NUMEROUS ACROSS THE
OUTLOOK AREA TODAY. STORMS WILL BEGIN TO TAPER OFF FROM THE
SOUTHWEST LATE THIS AFTERNOON WITH THIS TREND CONTINUING INTO
TONIGHT. LOCAL HEAVY RAINFALL WILL BE POSSIBLE WITH THESE STORMS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SHOWERS AND ISOLATED THUNDERSTORMS WILL BE MOSTLY CONFINED TO THE
NORTHEASTERN HALF OF THE OUTLOOK AREA MONDAY AND WILL END MONDAY
EVENING.

WARM DRY CONDITIONS ARE EXPECTED TUESDAY AND WEDNESDAY.

SOUTH WINDS WILL DEVELOP THURSDAY AND BECOME GUSTY ACROSS THE
WESTERN OUTLOOK AREA THURSDAY AFTERNOON. THESE WINDS WILL SPREAD
INTO THE EASTERN OUTLOOK AREA ON FRIDAY AND CONTINUE OVER THE
WEST.

SHOWERS AND THUNDERSTORMS COULD RETURN TO THE OUTLOOK AREA BY THE
END OF THE WEEK.

.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)

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

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
331 PM MDT SUN SEP 21 2014

UTZ020-518-212215-
SOUTH CENTRAL UTAH UT-SOUTHERN UTAH MOUNTAINS UT-
331 PM MDT SUN SEP 21 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL KANE COUNTY UNTIL
415 PM MDT...

AT 328 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 24 MILES EAST OF KANAB...MOVING NORTH AT 25 MPH.

PENNY TO NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE
POSSIBLE.

THIS STORM WILL CROSS HIGHWAY 89 A AND MOVED INTO THE VERMILLION
CLIFFS AREA OF THE GRAND STAIRCASE-ESCALANTE NATIONAL MONUMENT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY
BUILDING.

&&

LAT...LON 3702 11221 3705 11221 3737 11217 3731 11177
      3700 11197 3700 11213
TIME...MOT...LOC 2128Z 191DEG 22KT 3708 11208