Deep monsoonal moisture returned to Utah yet again for the last week of August, with several locations experiencing flash flooding and urban flooding from strong thunderstorms.
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.
Deep monsoonal moisture returned to Utah yet again for the last week of August, with several locations experiencing flash flooding and urban flooding from strong thunderstorms.
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 25, 3:22 PM MST, 2 hours 8 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 422 PM MDT MON AUG 25 2014 .SYNOPSIS...THE NEXT STORM SYSTEM WILL MOVE SLOWLY ACROSS THE REGION TONIGHT THROUGH WEDNESDAY. HIGH PRESSURE WILL RETURN TO THE AREA FOR THE LATTER PART OF THE WEEK. && .DISCUSSION...A PACIFIC TROUGH IS DIGGING INTO THE GREAT BASIN THIS AFTERNOON...AND HAS ALREADY BEGUN IMPACTING UTAH AND SOUTHWEST WYOMING. SCATTERED SHOWERS AND THUNDERSTORMS HAVE FORMED ACROSS THE NORTHERN TWO THIRDS OF THE CWA...WITH SEVERAL OF THESE STORMS PRODUCING HEAVY RAIN AND DECENT SIZED HAIL. REPORTED HAIL SO FAR HAS BEEN SUB-SEVERE...BUT A COUPLE OF STORMS WITHOUT REPORTS HAVE APPEARED TO BE SEVERE ON RADAR IMAGERY. THE TROUGH WILL MOVE ACROSS THE CWA THROUGH TUESDAY AND WEDNESDAY...AND IS EXPECTED TO PRODUCE WIDESPREAD CLOUD COVER AND PRECIPITATION. THE HEAVIEST RAINFALL WILL LIKELY BE ALONG THE UTAH/ARIZONA BORDER ON TUESDAY AFTERNOON...AS DEEP MOISTURE MOVES OVER THE AREA FROM THE SOUTH. THE TROUGH LOOKS TO EXIT THE REGION LATE WEDNESDAY...WITH SHORTWAVE RIDGING BUILDING OVER THE AREA BEGINNING THURSDAY MORNING. THE AIRMASS UNDER THE RIDGE IS EXPECTED TO BE DRIEST AND WARMEST OVER THE AREA IN MORE THAN A WEEK...AND TEMPERATURES WILL LIKELY RETURN TO NEAR OR SLIGHTLY ABOVE NORMAL FOR THE END OF AUGUST. THE PATTERN REMAINS FAIRLY PROGRESSIVE HOWEVER...WITH THE NEXT BROAD TROUGH MOVING THROUGH THE PACIFIC NORTHWEST AND GREAT PLAINS SATURDAY THROUGH MONDAY. THE SOUTHERN END OF THIS TROUGH IS PROGGED TO CLIP THE FORECAST AREA BEGINNING LATE SATURDAY AND CONTINUING THROUGH THE BEGINNING OF NEXT WEEK...COOLING TEMPERATURES A BIT AND INCREASING THE CHANCE OF PRECIPITATION ACROSS THE NORTHERN HALF OF THE AREA. && .AVIATION...NORTH WINDS WITH PREVAILING VFR CONDITIONS CAN BE EXPECTED THROUGH 04Z AT THE KSLC TERMINAL...WITH A WIND SHIFT BACK TO THE SOUTH BY 06Z. THERE IS A 30 PERCENT CHANCE OF SHOWERS AND THUNDERSTORMS CAPABLE OF PRODUCING MVFR VISIBILITY WITHIN HEAVY RAIN THROUGH THE EVENING. && .FIRE WEATHER...ANOTHER EARLY FALL LIKE STORM SYSTEM WILL MOVE ACROSS THE REGION TUESDAY THROUGH WEDNESDAY BRINGING SHOWERS AND THUNDERSTORMS. WETTING RAINS WILL OCCUR OVER MAINLY SOUTHERN AND CENTRAL UTAH BUT MANY AREAS OF NORTHERN UTAH WILL ALSO RECEIVE OVER 0.10 OF AN INCH AS WELL. THIS SYSTEM WILL EXIT THE REGION THURSDAY WITH A CHANCE OF SHOWERS AND THUNDERSTORMS STILL OVER THE EASTERN ZONES BUT THEN ALL AREAS DRY FOR FRIDAY AND SATURDAY. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && PUBLIC...SCHOENING FIRE WEATHER...STRUTHWOLF 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 547 AM MDT MON AUG 25 2014 UTZ001>016-019>021-517-518-WYZ021-261200- 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- 547 AM MDT MON AUG 25 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY ACROSS THE MOUNTAINS AND NORTH. SCATTERED STORMS WILL DEVELOP OVER THE SOUTHERN OUTLOOK AREA TONIGHT AND CONTINUE ACROSS THE NORTH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE ENTIRE OUTLOOK AREA TUESDAY WITH A THREAT OF LOCAL HEAVY RAIN. THE GREATEST THREAT OF FLASH FLOODING WILL BE OVER THE SOUTH. RAIN SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE ON WEDNESDAY ACROSS THE NORTH AND EAST WITH DRIER CONDITIONS ACROSS THE SOUTH. DRY CONDITIONS ARE EXPECTED AREA WIDE THURSDAY AND FRIDAY. THE THREAT OF AFTERNOON AND EVENING THUNDERSTORMS WILL RETURN TO THE NORTHERN OUTLOOK AREA OVER THE WEEKEND. .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 219 PM MDT MON AUG 25 2014 UTZ010-012-252100- CASTLE COUNTRY UT-WASATCH PLATEAU/BOOK CLIFFS UT- 219 PM MDT MON AUG 25 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DUCHESNE...NORTHWESTERN CARBON AND SOUTHEASTERN UTAH COUNTIES UNTIL 300 PM MDT... AT 216 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 10 MILES WEST OF HELPER...OR 20 MILES NORTHWEST OF PRICE... MOVING EAST AT 20 MPH. PENNY TO NICKEL SIZE HAIL AND WINDS OF 40 TO 50 MPH WILL BE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND BRIEF HEAVY RAIN. LOCATIONS IMPACTED INCLUDE... HIGHWAY 6 THROUGH PRICE CANYON...AND HIGHWAY 191 THROUGH INDIAN CANYON..ALONG WITH HELPER...COAL CITY...CASTLE GATE AND KENILWORTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY BUILDING. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3962 11103 3976 11107 3996 11068 3971 11055 TIME...MOT...LOC 2016Z 248DEG 16KT 3969 11097 MPS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 304 PM MDT MON AUG 25 2014 UTZ010-011-252145- WESTERN UINTA BASIN UT-WASATCH PLATEAU/BOOK CLIFFS UT- 304 PM MDT MON AUG 25 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL DUCHESNE AND NORTH CENTRAL CARBON COUNTIES UNTIL 345 PM MDT... AT 304 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 12 MILES NORTHEAST OF HELPER...OR 16 MILES NORTHEAST OF PRICE...MOVING NORTHEAST AT 30 MPH. PENNY TO NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTH CENTRAL DUCHESNE AND NORTH CENTRAL CARBON COUNTIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY BUILDING. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3972 11076 3986 11078 4009 11030 3982 11012 TIME...MOT...LOC 2104Z 243DEG 24KT 3982 11069 MPS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 345 PM MDT MON AUG 25 2014 UTZ010-011-252230- WESTERN UINTA BASIN UT-WASATCH PLATEAU/BOOK CLIFFS UT- 345 PM MDT MON AUG 25 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DUCHESNE COUNTY UNTIL 430 PM MDT... AT 344 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 17 MILES SOUTH OF DUCHESNE...MOVING NORTHEAST AT 25 MPH. PENNY TO NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAINFALL. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTHEASTERN DUCHESNE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. && LAT...LON 3982 11054 3997 11057 4016 10998 3981 10997 TIME...MOT...LOC 2144Z 243DEG 23KT 3992 11043 MPS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
417 PM MDT MON AUG 25 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM HAIL BOUNTIFUL 40.88N 111.86W
08/25/2014 E0.75 INCH DAVIS UT OTHER FEDERAL
NEAR BOUNTIFUL TEMPLE
&&
LVERZELThe Salt Lake City radar (KMTX), 214 km away, was scanning. The volume nearest the first event began at 00:29 UTC.
7 flash flood. Local standard time, as filed.
Heavy rain over the Seeley burn scar caused flooding in Hughes Canyon and near Electric Lake in Upper Huntington Canyon. Flooding was reported in the lower portion of Huntington Canyon as well, with mud and rocks covering the road near the Huntington Plant.
Flash flooding closed Utah State Route 29 between Castle Dale and Joe's Valley, with water and rocks covering the roadway.
Heavy rain caused flash flooding in Capitol Reef National Park, with both Grand Wash and Capitol Gorge experiencing flooding. Rangers also closed the Scenic Drive due to flooding.
Flash flooding occurred on both La Verkin Creek and Dry Creek, with the gauge along La Verkin Creek increasing to 800 cfs.
Heavy rain caused flash flooding in Zion National Park, with flooding stranding a few hikers in the Narrows until the waters receded. The gauge on the North Fork of the Virgin River rose to 1577 cfs.
Flash flooding was reported in both Johnson Canyon and Buckskin Wash, with road damage in multiple locations across the area.
Flash flooding occurred along Wahweap Creek, with the Smoky Mountain Road becoming impassable for several hours.
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: 541421, 541422, 541423, 541424, 541425, 541426, 541428.