Severe thunderstorms continued to be a threat in northern Utah heading into the end of August, with multiple storms producing strong winds and large hail.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SLC wrote it up.
Severe thunderstorms continued to be a threat in northern Utah heading into the end of August, with multiple storms producing strong winds and large hail.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Salt Lake City, UT wrote its last area forecast discussion before the first event at Aug 22, 8:56 PM MST, 5 hours 59 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 956 PM MDT FRI AUG 22 2014 .SYNOPSIS...A COLD TROUGH WILL IMPACT NORTHERN AND CENTRAL UTAH TONIGHT AND SATURDAY. ANOTHER TROUGH WILL IMPACT THE AREA EARLY NEXT WEEK BEFORE HIGH PRESSURE RETURNS FOR THE LATTER PART OF THE WEEK. && .DISCUSSION...A COOL UPPER TROF IS CENTERED OVER WEST CENTRAL ID THIS EVE. THE ASSOCIATED COLD FRONT EXTENDS FROM ABOUT PRICE TO MILFORD AND CONTINUES DRIVING SEWD. A BROAD SWATH OF CONVECTIVE PRECIP ACCOMPANIES THE COLD FRONT AND HAS CLEARED THE NORTHERN AND CENTRAL WASATCH FRONT BUT WILL PERSIST IN UT CO A LITTLE WHILE LONGER. ADDITIONAL SHOWERS OVER NWRN UT ASSOCIATED WITH THE ADVANCING COLD POOL ALOFT SHOULD CONTINUE TO PROPAGATE EAST AND FILL BACK IN ACROSS THE NORTHERN AND CENTRAL WASATCH FRONT LATER TONIGHT. EXPECT THE SHOWERS AT THE SOUTHERN END OF THE COLD FRONT TO WEAKEN OVER THE NEXT SEVERAL HOURS AS IT MOVES FARTHER AWAY FROM THE UPPER SUPPORT WHILE THE PORTION CROSSING CENTRAL AND NERN UT SHOULD HOLD TOGETHER. THE UPPER TROF AXIS CROSSES NRN UT AROUND MIDDAY AND EXPECT PRECIP TO SHUT DOWN RAPIDLY ALONG AND RIGHT BEHIND THIS AXIS WITH SKIES CLEARING OUT IN THE AFTN ACROSS THE N AND W. A MOSTLY CLEAR NIGHT SHOULD ALLOW TEMPS TO DIP TO CHILLY LEVELS SUN MORNING ALTHO THEY WILL REMAIN WELL ABOVE FREEZING IN THE POPULATED VALLEYS. SOME CONVECTION IS POSSIBLE ACROSS CENTRAL UT SUN AS THE REMAINS OF THE COLD FRONT START TO LIFT BACK NORTH AS A WEAK WARM FRONT AHEAD OF THE NEXT SHORT WAVE THAT DEEPENS THE UPPER TROF AGAIN TO OUR WEST. UPDATED EARLIER TO MAKE SOME SHORT TERM ADJUSTMENTS TO POPS SKY AND WIND. NO ADDITIONAL UPDATES PLANNED. && .AVIATION...A BREAK IN THE SHOWERS AT THE KSLC TERMINAL WILL LAST THROUGH ABOUT 06Z TONIGHT WITH OCCASIONAL PASSING SHOWERS AFTER THAT. WINDS HAVE RETURNED TO SOUTHEASTERLY AND SHOULD REMAIN THAT WAY INTO THE MORNING. HOWEVER GUSTY ERRATIC WINDS ARE POSSIBLE WITH SHOWERS. VFR CONDITIONS WILL PREVAIL BUT BRIEF MVFR CONDITIONS ARE POSSIBLE IF A SHOWER PASSES DIRECTLY OVERHEAD. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && WILENSKY 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 437 AM MDT FRI AUG 22 2014 UTZ001>016-019>021-517-518-WYZ021-231045- 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- 437 AM MDT FRI AUG 22 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT AN UNSEASONABLY COLD TROUGH WILL IMPACT PRIMARILY NORTHERN UTAH AS IT MOVES THROUGH THIS AFTERNOON AND TONIGHT...BRINGING WIDESPREAD PRECIPITATION AND MUCH COLDER AIR. LINGERING INSTABILITY WILL ALLOW SOME SHOWERS AND THUNDERSTORMS TO DEVELOP OVER CENTRAL AND SOUTHERN UTAH THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE TROUGH WILL CONTINUE TO MOVE THROUGH NORTHERN UTAH THROUGH SATURDAY AFTERNOON BEFORE EXITING SATURDAY EVENING. PRECIPITATION WILL CONTINUE THROUGH SATURDAY AFTERNOON BEFORE TAPERING OFF. TEMPERATURES OVER NORTHERN UTAH WILL BE IN EXCESS OF 15 DEGREES COOLER THAN TEMPERATURES ON FRIDAY WITH LITTLE CHANGE IN TEMPERATURES EXPECTED OVER CENTRAL AND SOUTHERN UTAH. THE OUTLOOK AREA WILL SEE A BRIEF WARMING AND DRYING TREND FOR THE LATTER HALF OF THE WEEKEND...THOUGH A FEW AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE. ANOTHER TROUGH WILL MOVE THROUGH EARLY NEXT 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 226 AM MDT SAT AUG 23 2014 UTZ005-230930- GREAT SALT LAKE DESERT AND MOUNTAINS UT- 226 AM MDT SAT AUG 23 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN TOOELE COUNTY UNTIL 330 AM MDT... AT 226 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 14 MILES EAST OF IBAPAH...OR 47 MILES EAST OF LAGES JUNCTION...MOVING EAST AT 35 MPH. PENNY TO NICKEL SIZE HAIL AND WINDS OF 40 TO 55 MPH WILL BE POSSIBLE. LOCATIONS IMPACTED INCLUDE... IBAPAH. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY BUILDING. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 3994 11405 4016 11405 4038 11310 3993 11295 TIME...MOT...LOC 0826Z 270DEG 29KT 4004 11371 CRK
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
334 AM MDT SAT AUG 23 2014
UTZ003-005-015-231030-
SALT LAKE AND TOOELE VALLEYS UT-
GREAT SALT LAKE DESERT AND MOUNTAINS UT-WEST CENTRAL UTAH UT-
334 AM MDT SAT AUG 23 2014
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN JUAB...SOUTHEASTERN
TOOELE AND WEST CENTRAL UTAH COUNTIES UNTIL 430 AM MDT...
AT 334 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 9 MILES SOUTHWEST OF DUGWAY...MOVING EAST AT 35
MPH.
PEA SIZE HAIL AND WINDS OF 40 TO 55 MPH WILL BE POSSIBLE.
LOCATIONS IMPACTED INCLUDE...
DUGWAY...VERNON...RUSH VALLEY...FAUST AND LOFGREEN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY
BUILDING.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 3992 11329 4040 11292 4033 11219 4028 11218
4026 11219 4017 11215 4015 11217 4010 11215
4006 11218 4002 11217 3994 11227 3995 11233
3991 11234
TIME...MOT...LOC 0934Z 278DEG 30KT 4017 11288
CRKThe Salt Lake City radar (KMTX), 155 km away, was scanning. The volume nearest the first event began at 09:56 UTC.
5 hail, 1 thunderstorm wind. Local standard time, as filed.
A maximum wind gust of 67 mph was recorded by the Simpson Springs sensor in the Dugway Proving Ground mesonet.
Penny sized hail was reported in Lehi.
Nickel sized hail was reported near Sunnyside.
Hail with an average diameter of one inch fell along United States Highway Route 6, north of Helper. The hail accumulated to a depth of 4 inches, requiring the road to be plowed.
Penny sized hail was reported near the LDS temple in Bountiful.
Hail with a diameter of 1 to 1.5 inches was reported along Utah State Route 31 in Huntington Canyon, and the hail accumulated to a depth of 6 inches on the roadway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2014Every state in 2014This day in weather historyWarnings in Utah, August 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 540997, 540998, 540999, 541001, 541000, 541002.