Severe Thunderstorm Warning 9, NWS Salt Lake City, UT

783 
WWUS55 KSLC 062134
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
334 PM MDT SAT JUL 6 2013

UTC027-062145-
/O.CON.KSLC.SV.W.0009.000000T0000Z-130706T2145Z/
MILLARD UT-
334 PM MDT SAT JUL 6 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR EAST CENTRAL MILLARD COUNTY...

AT 330 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR FILLMORE...MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  EASTERN MILLARD COUNTY BETWEEN I-15 AND US-50

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3916 11223 3902 11204 3879 11235 3892 11251
TIME...MOT...LOC 2133Z 226DEG 15KT 3896 11226

$$

MT

118 
WWUS55 KSLC 062143
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
343 PM MDT SAT JUL 6 2013

UTC027-062153-
/O.EXP.KSLC.SV.W.0009.000000T0000Z-130706T2145Z/
MILLARD UT-
343 PM MDT SAT JUL 6 2013

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MILLARD COUNTY
WILL EXPIRE AT 345 PM MDT...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING
HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3916 11223 3902 11204 3879 11235 3892 11251
TIME...MOT...LOC 2143Z 226DEG 15KT 3899 11222

$$

MT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1000 AM MDT SAT JUL 6 2013

.SYNOPSIS...THE RIDGE OF HIGH PRESSURE OVER THE DESERT SOUTHWEST
WILL REMAIN SOUTH AND EAST OF UTAH THROUGH SUNDAY...WITH A MOIST
AND SOMEWHAT UNSTABLE AIRMASS REMAINING OVER THE EASTERN GREAT
BASIN. THE RIDGE WILL BUILD NORTHWARD EARLY NEXT WEEK...ENABLING A
PUSH OF A SOMEWHAT WARMER AND DRIER AIRMASS INTO THE REGION.

&&

.DISCUSSION...UTAH AND SOUTHWEST WYOMING REMAIN ON THE
SOUTHEASTERN FRINGES OF A TROUGH THAT IS CENTERED OVER THE PACIFIC
NORTHWEST...WITH A RIDGE OFF TO THE SOUTHEAST CENTERED OVER NEW
MEXICO. PARTLY TO MOSTLY CLOUDY SKIES EXIST ACROSS MUCH OF THE
FORECAST AREA THIS MORNING...AS A MOIST AIRMASS REMAINS OVER THE
INTERMOUNTAIN WEST. SATELLITE IMAGERY AND THE 12Z SLC SOUNDING
BOTH INDICATE PRECIPITABLE WATER VALUES GENERALLY IN THE 0.9 TO
1.1 INCH RANGE OVER THE AREA. THIS SHOULD HELP PRODUCE ANOTHER
AFTERNOON AND EVENING OF SHOWER AND THUNDERSTORM DEVELOPMENT
ACROSS THE CWA.

SYNOPTIC-SCALE FORCING FOR THESE STORMS SHOULD BE A LITTLE LESS
THAN WITH YESTERDAYS SEVERE WEATHER. THAT SAID...THERE SHOULD
STILL BE SOME WEAK MID AND UPPER LEVEL WAVES MOVING OVER NORTHERN
UTAH...AND A WEAK JET STREAK OVER THE FAR NORTH. EFFECTIVE SHEAR
EXCEEDING 30 KNOTS IN PARTS OF NORTHERN UTAH COULD HELP TO PRODUCE
SOME MORE ORGANIZED ACTIVITY AS THE AFTERNOON GOES ON. LIFTED
INDICES AND OTHER INSTABILITY PARAMETERS INDICATE ANOTHER ACTIVE
DAY PARTICULARLY ACROSS THE NORTHERN HALF OF THE STATE...BUT THERE
IS A CHANCE DEVELOPMENT WILL BE SLOW EARLY IN THE AFTERNOON UNTIL
WIDESPREAD CLOUD COVER FROM OGDEN TO DELTA CLEARS OUT A BIT. A
WIDE AREA OF SURFACE BASED CIN CURRENTLY ANALYZED OVER THE
NORTHERN HALF OF THE STATE SUPPORTS THIS IDEA OF DELAYED
DEVELOPMENT.

IN SOUTHERN UTAH...SHEAR AND INSTABILITY ARE BOTH MUCH LESS THAN
IN THE NORTHERN PORTIONS OF THE CWA. THAT SAID...THE AIRMASS IS
STILL VERY MOIST OVER SOUTHERN UTAH...AND SCATTERED SHOWERS AND
THUNDERSTORMS SHOULD STILL DEVELOP. FLOW IS ALSO LESS DOWN
SOUTH...WITH MOST OF THE STEERING FLOW IN THE 10 TO 15 KNOT RANGE.
THIS SOMEWHAT SLOWER FLOW COULD INCREASE FLASH FLOOD DANGER IN THE
FLOOD PRONE AREAS OF SOUTHERN UTAH. THE CURRENT FLASH FLOOD
POTENTIAL RATING FOR MOST OF THE NATIONAL PARKS AND RECREATION
AREAS IS LISTED AS MODERATE...WHICH LOOKS GOOD FOR TODAYS
SITUATION.

UPDATED THE FORECAST EARLIER THIS MORNING TO INCREASE CLOUD COVER
AND POPS FOR THE MORNING HOURS. OTHERWISE...THE FORECAST LOOKS TO
BE IN GOOD SHAPE AND NO FURTHER UPDATES ARE ANTICIPATED.

&&

.AVIATION...SOUTH WINDS WILL PREVAIL AT THE SALT LAKE TERMINAL
THROUGH THE MORNING HOURS. EXPECTING A WIND SHIFT TO THE NORTHWEST
AROUND 20Z...BUT THERE IS A 30 PERCENT CHANCE THAT THIS SHIFT WILL
NOT OCCUR. RATHER...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
DEVELOP ACROSS NORTHERN UTAH DURING THE AFTERNOON HOURS WITH OUTFLOW
WINDS POSSIBLY CONTRIBUTING TO ERRATIC WIND DIRECTIONS AND
OCCASIONAL GUSTS GREATER THAN 26KT. VFR CONDITIONS ARE EXPECTED
THROUGH THE DAY SATURDAY BUT CIGS NEAR/BELOW 6000FT AGL WILL BE
POSSIBLE UNDER HEAVIER SHOWERS. THERE IS A 30 PERCENT CHANCE OF
THUNDERSTORMS WITHIN 5SM OF THE TERMINAL...WITH BEST WINDOW BETWEEN
20-02Z.

&&

.FIRE WEATHER...A MOIST AND UNSTABLE AIRMASS WILL REMAIN IN PLACE
THROUGH THE WEEKEND. THIS WILL CONTINUE TO BRING PERIODS OF WET
THUNDERSTORMS TO MUCH OF THE FIRE DISTRICT...ALTHOUGH GUSTY OUTFLOW
WINDS WILL ACCOMPANY SOME OF THE STRONGER STORMS. A DRYING TREND
WILL BEGIN ON MONDAY AND CONTINUE THROUGH MIDWEEK. AS RELATIVE
HUMIDITIES LOWER...CRITICAL FIRE WEATHER CONDITIONS MAY DEVELOP AS
SOUTHERLY WINDS INCREASE...ESPECIALLY ON WEDNESDAY AND THURSDAY.
OTHERWISE...MOISTURE LOOKS TO SPREAD BACK INTO THE AREA AGAIN FOR
THE END OF NEXT WEEK.

&&

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

PUBLIC...SCHOENING/VERZELLA/TRAPHAGAN
FIRE WEATHER...
AVIATION...

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
412 AM MDT SAT JUL 6 2013

UTZ001>016-019>021-517-518-WYZ021-071015-
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-
412 AM MDT SAT JUL 6 2013

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL INCREASE IN COVERAGE THIS
AFTERNOON...THEN CONTINUE INTO THIS EVENING.

OVER NORTHERN UTAH...ISOLATED SEVERE THUNDERSTORMS WILL BE
POSSIBLE...WITH DAMAGING WIND THE PRIMARY THREAT. THERE IS...
HOWEVER...SOME POTENTIAL FOR FLASH FLOODING IN THE BURN SCAR AREAS.

OVER SOUTHERN UTAH...ISOLATED FLASH FLOODING IS THE PRIMARY
CONCERN.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THUNDERSTORM WILL STILL BE POSSIBLE...BUT COVERAGE WILL DECREASE
THROUGH MIDWEEK.

CRITICAL FIRE WEATHER CONDITIONS MAY DEVELOP BY WEDNESDAY AND
THURSDAY AS DRIER AIR SPREADS INTO THE REGION AND A STRONGER
SOUTHWEST FLOW DEVELOPS.

TEMPERATURES WILL WARM AS THE WEEK UNFOLDS...WITH TRIPLE DIGIT
READINGS POSSIBLY ACROSS NORTHERN UTAH VALLEY LOCATIONS BY
WEDNESDAY OR THURSDAY...WITH READINGS NEAR 110 DEGREES IN DIXIE.

.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