Severe Thunderstorm Warning 73, NWS Salt Lake City, UT

169 
WWUS55 KSLC 052319
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
519 PM MDT WED AUG 5 2015

UTC003-052330-
/O.CON.KSLC.SV.W.0073.000000T0000Z-150805T2330Z/
BOX ELDER UT-
519 PM MDT WED AUG 5 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR NORTHEASTERN BOX ELDER COUNTY...

AT 517 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 JUST EAST OF HOWELL...OR 11 MILES NORTHWEST OF 
TREMONTON...MOVING EAST AT 40 MPH. THIS STORM IS EXPECTED TO IMPACT 
INTERSTATE 15 BETWEEN HONEYVILLE AND THE UTAH/IDAHO BORDER. THIS   
STORM HAS ALSO CONSISTENTLY EXHIBITED ROTATION THROUGH ITS LIFETIME.

LOCATIONS IMPACTED INCLUDE... 
PLYMOUTH...RIVERSIDE...PETER... 
GARLAND...ELWOOD...FIELDING...DEWEYVILLE...PORTAGE...BOTHWELL... 
WASHAKIE...THATCHER AND COLLINSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

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.

&&

LAT...LON 4165 11236 4186 11252 4200 11223 4200 11217
      4192 11212 4188 11206 4180 11202 4171 11204
TIME...MOT...LOC 2317Z 253DEG 35KT 4177 11233 

$$

ES

336 
WWUS55 KSLC 052329
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
529 PM MDT WED AUG 5 2015

UTC003-052338-
/O.EXP.KSLC.SV.W.0073.000000T0000Z-150805T2330Z/
BOX ELDER UT-
529 PM MDT WED AUG 5 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BOX ELDER COUNTY
WILL EXPIRE AT 530 PM MDT...
                
THE STORM WHICH PROMPTED THE SEVERE THUNDERSTORM WARNING IN NORTHERN 
BOX ELDER COUNTY HAS WEAKENED...SO THEREFORE THE WARNING WILL BE 
ALLOWED TO EXPIRE. HOWEVER...SMALL HAIL...GUSTY WINDS AND HEAVY RAIN 
ARE STILL POSSIBLE WITH THIS THUNDERSTORM AS IT CROSSES CACHE VALLEY 
AND BEAR LAKE. CONTINUE TO USE CAUTION NEAR THIS STORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
SALT LAKE CITY.

LAT...LON 4165 11236 4186 11252 4200 11223 4200 11217
      4192 11212 4188 11206 4180 11202 4171 11204
TIME...MOT...LOC 2326Z 263DEG 38KT 4177 11233 

$$

ES

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
429 PM MDT WED AUG 5 2015

.SYNOPSIS...A WEAK UPPER LEVEL DISTURBANCE WILL CROSS NORTHERN
UTAH THIS EVENING. A RIDGE OF HIGH PRESSURE WILL BUILD OVER THE
REGION ON THURSDAY. AN UPPER LOW WILL BRING AN INCREASE IN MONSOON
MOISTURE AS IT LIFTS ACROSS THE GREAT BASIN FRIDAY AND SATURDAY.

&&

.SHORT TERM (THRU 12Z SATURDAY)...A FAIRLY VIGOROUS SHORT WAVE
TROF IS ENTERING NWRN UT AT THIS TIME AND WILL CROSS NRN UT THRU
THIS EVE. SCATTERED CONVECTION HAS FORMED OVER THE FAR NW WITH AND
WILL SPREAD ACROSS THE FAR NRN CWA AS THIS FEATURE MOVES EAST WITH
THE SRN EXTENT OF THE THREAT OF SHOWERS DOWN TO ABOUT SALT LAKE
COUNTY.

THERE IS A TAP OF TROPICAL MOISTURE AT MID AND UPPER LEVELS
FEEDING INTO THIS SHORT WAVE FROM THE WEAKENING TROPICAL STORM
GUILLERMO OUT NEAR HAWAII. THIS HAS SUPPLIED AN ASSIST TO THIS
WAVE AND ISOLATED STRONG STORMS HAVE DEVELOPED AND WILL CONTINUE
TO BE POSSIBLE INTO EARLY EVE.

THIS WAVE MOVES EAST OF THE CWA AFTER 06Z TONIGHT TAKING THE
CONVECTION WITH IT. SHORT WAVE RIDGING BUILDS OVER THE CWA THU
WITH THE AXIS OVER EASTERN UT AS A CLOSED LOW APPROACHES THE CA
COAST. THIS TAPS TROPICAL MOISTURE FROM OLD MEXICO THAT STARTS TO
SPREAD INTO SWRN UT BY 00Z FRI AND ACROSS THE CWA OVER THE NEXT 24
HOURS. THIS MOISTURE WILL LIKELY BRING WIDESPREAD PRECIP TO THE
AREA AND HAVE RAISED POPS INTO THE LIKELY CATEGORY FOR MOST AREAS
FRIDAY AFTERNOON AND EVENING.

THE CLOSED LOW LIFTS INTO THE WESTERN GREAT BASIN ON FRI AND
STARTS TO OPEN UP. IT THEN SHIFTS EAST FRIDAY NIGHT AND DRIER AIR
STARTS TO SPREAD IN FROM THE SOUTHWEST.

.LONG TERM (AFTER 12Z SATURDAY)...A WEAKENING TROUGH WILL CONTINUE
TO LIFT NORTHEASTWARD ACROSS NORTHEAST NEVADA INTO SOUTHERN
IDAHO THROUGH THE DAY SATURDAY. A SIGNIFICANT DEEP MOISTURE SURGE
AHEAD OF THIS WAVE WILL PROVIDE SUFFICIENT MOISTURE FOR ONGOING
PRECIPITATION SATURDAY MORNING ACROSS PORTIONS OF NORTHERN AND
CENTRAL UTAH. AS A DRY SLOT CONTINUES TO PROGRESS NORTH AND
EAST...EXPECT PRECIPITATION TO GRADUALLY END FROM SOUTHWEST TO
NORTHEAST BY EVENING.

THE WAVE WILL LIFT AWAY FROM THE AREA BY LATER SATURDAY...ENDING THE
PRECIPITATION ACROSS THE REGION. IN THE WAKE OF THIS WAVE...HIGH
PRESSURE WILL BUILD ACROSS THE AREA...BRINGING A PERIOD OF WARM AND
DRY CONDITIONS TO THE STATE. AS A FAIRLY POTENT UPPER LEVEL SYSTEM
APPROACHES THE PACIFIC NORTHWEST...MOISTURE WILL BEGIN TO SURGE
NORTHWARD AGAIN...INTO PORTIONS OF SOUTHERN UTAH BY TUESDAY. GLOBAL
MODELS HAVE BEEN FAIRLY CONSISTENT WITH THE EVOLUTION OF THIS
MOISTURE SURGE.

&&

.AVIATION...GUSTY SOUTHERLY WINDS WILL CONTINUE AT KSLC UNTIL THE
ARRIVAL OF A COLD FRONT BETWEEN 23-00Z THEN SWITCH TO NORTHWEST.
THE NORTHWEST WINDS WILL BE GUSTY FOR A COUPLE OF HOURS BEHIND
THE FRONT.

&&

.FIRE WEATHER...GUSTY SOUTHWESTERLY WINDS WILL CONTINUE INTO THIS
EVENING ACROSS MUCH OF THE AREA AHEAD OF A COLD FRONT. THE GUSTY
WINDS AND LOW RH VALUES WILL KEEP FIRE WEATHER CONDITIONS CRITICAL
OVER FAR SOUTHERN UTAH THIS AFTERNOON INTO EARLY THIS EVENING AND
HAVE KEPT THE RED FLAG WARNING IN EFFECT FOR THIS. THE FRONT
WILL CROSS NORTHERN UTAH THIS EVENING WITH SCATTERED SHOWERS AND
THUNDERSTORMS AND GUSTY SHIFTING WINDS. HIGH PRESSURE WILL BRIEFLY
STRENGTHEN THURSDAY...BEFORE MONSOON MOISTURE SURGES NORTHWARD
ACROSS THE AREA LATE THURSDAY NIGHT THROUGH FRIDAY. WETTING RAINS
WILL BE LIKELY ACROSS MUCH OF THE AREA FRIDAY INTO FRIDAY NIGHT
WITH THIS MOISTURE BEFORE DRIER AIR SPREADS BACK TO THE REGION
FROM THE SOUTHWEST BEGINNING SATURDAY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...RED FLAG WARNING UNTIL 8 PM MDT THIS EVENING FOR UTZ497-498.

WY...NONE.
&&

WILENSKY/KRUSE

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
855 AM MDT WED AUG 5 2015

UTZ001>016-019>021-517-518-WYZ021-061200-
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-
855 AM MDT WED AUG 5 2015

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

.DAY ONE...TODAY AND TONIGHT

HAZARDOUS FIRE WEATHER CONDITIONS ARE EXPECTED ACROSS FAR SOUTHWEST
AND SOUTH CENTRAL UTAH THROUGH EARLY THIS EVENING.

ISOLATED TO SCATTERED THUNDERSTORMS CAN BE EXPECTED THIS
AFTERNOON AND EARLY EVENING ACROSS NORTHERN UTAH. STRONG GUSTY
WINDS WILL BE POSSIBLE WITH THE STORMS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SHOWERS AND THUNDERSTORMS ARE EXPECTED LATE THURSDAY NIGHT
THROUGH FRIDAY NIGHT STATEWIDE. SOME OF THESE THUNDERSTORMS MAY BE
STRONG FRIDAY AFTERNOON AND EVENING WITH GUSTY WINDS AND SMALL
HAIL. IN ADDITION...ANY THUNDERSTORMS DURING THIS PERIOD WILL HAVE
THE POTENTIAL FOR HEAVY RAINFALL AND ISOLATED FLASH FLOODING.

.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