Thunderstorms produced severe winds that caused damage in Box Elder and Cache Counties.
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.
Thunderstorms produced severe winds that caused damage in Box Elder and Cache Counties.
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 5, 3:10 PM MST, 1 hour 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 410 PM MDT SUN AUG 5 2007 .SYNOPSIS...UPPER TROUGH ALONG THE WEST COAST WILL KEEP SOUTHWEST FLOW ACROSS THE REGION...RESULTING IN A GRADUAL DRYING TREND THROUGH LATE IN THE WEEK. WEAK DISTURBANCES WITHIN THIS FLOW WILL TRACK ACROSS NORTHWEST UTAH THROUGH TUESDAY. && .DISCUSSION...AN UPPER TROUGH OVER NORTHWEST NEVADA AND SOUTHEAST OREGON CONTINUES TO TRACK NORTHEAST AND WILL BRUSH EXTREME NORTHWEST UTAH THIS EVENING...ACCOMPANIED BY A 85-90KT 300MB JET STREAK. THIS WILL HELP ORGANIZE ANY CONVECTION THAT DEVELOPS...BUT IT APPEARS THE BEST DYNAMICS WILL MOSTLY REMAIN NORTH OF UTAH. A DRY SLOT HAS MOVED INTO EASTERN NEVADA...WITH DEWPOINTS THERE DOWN TO THE 20S THIS AFTERNOON. A FAIRLY SHARP MOISTURE GRADIENT IS STILL APPARENT ALONG THE UTAH/NEVADA BORDER HOWEVER...WITH DEWPOINTS OVER WESTERN UTAH IN THE 40S. THE AIRMASS HAS BEEN TOO STABLE TO ALLOW CONVECTION TO DEVELOP EARLIER THIS AFTERNOON...BUT CONTINUED SURFACE HEATING HAS FINALLY HELPED TO PRODUCE ISOLATED THUNDERSTORMS. THERE IS A SLIGHT SEVERE POTENTIAL WITH STORMS THAT DEVELOP OVER NORTHWEST UTAH...OWING TO THE STRONG WIND SHEAR...BUT MOST OF THESE SHOULD BE LIMITED TO NEAR THE IDAHO BORDER. MEANWHILE...AN AREA OF SCATTERED CONVECTION FROM A VORT LOBE MOVING ACROSS WESTERN UTAH HAS NOW SLID INTO NORTHEAST UTAH AND SHOULD BE EAST OF THE CWA LATER THIS EVENING. OVER THE SOUTH...PRECIPITABLE WATER VALUES OF AN INCH OR MORE PERSIST...BUT WITH LITTLE FORCING OUTSIDE OF AFTERNOON SURFACE INSOLATION...CONVECTION HAS BEEN SLOW TO DEVELOP. CONVECTION IS NOW FINALLY INCREASING IN AREAL COVERAGE. SOME OF THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE LOCALLY HEAVY RAIN...BUT DUE TO INCREASED FLOW ALOFT...THEY SHOULD BE MOVING FAST ENOUGH TO REDUCE SOMEWHAT THE CHANCE OF FLASH FLOODING OVER ALL BUT THE EXTREME SOUTHEASTERN ZONES. A WEAK DISTURBANCE MOVING INTO SOUTHEAST UTAH FROM ARIZONA TONIGHT COULD KEEP CONVECTION GOING THERE OVERNIGHT. WEST TO SOUTHWEST FLOW CONTINUES OVER NORTHERN AND WESTERN UTAH TOMORROW...ALLOWING DRIER AIR TO PUSH FARTHER INTO THE AREA. ENOUGH MOISTURE WILL LINGER OVER THE SOUTHEAST FOR A CHANCE OF THUNDERSTORMS. A SLIGHTLY COOLER AIRMASS WILL ALSO WORK ITS WAY INTO THE AREA...SO EXPECT AFTERNOON HIGHS NEAR OR SLIGHTLY BELOW CLIMO. THE COOLER AIR THEN REMAINS OVER THE AREA THROUGH MIDWEEK WITH A DRYING TREND ACROSS THE AREA. WEAK DISTURBANCES CONTINUE TO PUSH ACROSS NORTHWEST UTAH...BUT THE AIRMASS SHOULD BE TOO DRY DURING THE MIDDLE AND LATTER PART OF THE WEEK TO PRODUCE THUNDERSTORMS. THE LATEST GFS RUNS SUGGEST THAT MOISTURE WILL RETURN FOR NEXT WEEKEND. && .AVIATION...STRONG SOUTHERLY FLOW KEEPING THE LAKE BREEZE AT BAY THIS AFTERNOON AT SLC. THERE IS A 10 PERCENT CHANCE OF A PERIOD OF LIGHT AND VARIABLE OR NORTHWEST WINDS NEAR 00Z...BUT NOT ENOUGH CONFIDENCE TO MENTION IN THE TAF. THUNDERSTORM OUTFLOW WINDS ARE NOT LIKELY...HOWEVER IF THEY DO OCCUR THE MOST LIKELY DIRECTION WOULD BE FROM THE SOUTH. && .FIRE WEATHER...THUNDERSTORMS WILL CONTINUE ACROSS NORTHERN UTAH INTO THE EVENING HOURS AS A WEATHER SYSTEM BRUSHES THE AREA. DRIER AIR ACROSS THE AREA WILL LIKELY RESULT IN STRONG GUSTY WINDS WITH THESE STORMS. FURTHER SOUTH...ISOLATED WETTING RAINS WILL CONTINUE ACROSS SOUTHEASTERN UTAH TODAY WHERE DEEP MOISTURE REMAINS. A GRADUAL DRYING TREND WILL DEVELOP ACROSS MUCH OF THE DISTRICT DURING UPCOMING WEEK. THIS MAY RESULT IN CRITICAL FIRE WEATHER CONDITIONS ACROSS WESTERN UTAH LATE IN THE WEEK INTO NEXT WEEKEND DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && PUBLIC...CHENG AVIATION...SMITH FIRE WEATHER...SEAMAN FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 431 AM MDT SUN AUG 5 2007 UTZ001>008-014>016-019-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- SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH- UTAHS DIXIE AND ZION NATIONAL PARK-SOUTHWEST WYOMING- 431 AM MDT SUN AUG 5 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOST OF CENTRAL AND NORTHERN UTAH...POPTIONS OF SOUTHWEST UTAH AS WELL AS SOUTHWEST WYOMING. ISOLATED THUNDERSTORMS WILL OCCUR TODAY AND INCREASE IN COVERAGE THROUGH THE AFTERNOON AND EARLY EVENING. STORMS WILL HAVE BRIEF HEAVY RAIN WITH GUSTY WINDS AND POSSIBLE HAIL...ESPECIALLY ACROSS THE NORTHWEST AREAS LATE THIS AFTERNOON AND EARLY IN EVENING. SOUTHWEST WINDS WILL INCREASE ACROSS WESTERN UTAH TODAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY WIDELY SCATTERED THUNDERSTORMS FOR MONDAY THROUGH WEDNESDAY WITH A DECREASING TREND. THUNDERSTORMS MAINLY IN NORTHWEST UTAH AND THE NORTHEAST MOUNTAINS. BREEZY SOUTHWEST WINDS WILL OCCUR ON MONDAY AND TUESDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. UTZ009>013-020-021-517-518-061200- WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS- WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL- SOUTH CENTRAL UTAH-GLEN CANYON RECREATION AREA/LAKE POWELL- CENTRAL MOUNTAINS-SOUTHERN MOUNTAINS- 431 AM MDT SUN AUG 5 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND SOUTHERN UTAH. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS WILL DEVELOP LATE THIS MORNING AND BECOME MORE NUMEROUS IN THE AFTERNOON. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAIN INTO THE EARLY EVENING HOURS...MAINLY ACROSS EASTERN UTAH. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED THUNDERSTORMS MAINLY ACROSS SOUTH CENTRAL AND EASTERN UTAH FOR MONDAY. THUNDERSTORMS WILL CONTAIN HEAVY RAIN...ESPECIALLY IN THE AFTERNOON AND EVENING HOURS. WIDELY SCATTERED THUNDERSTORMS FOR THE PERIOD TUESDAY THROUGH THURSDAY WITH A DECREASING TREND TO ISOLATED ACTIVITY ON FRIDAY AND SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. TARDY FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
The Salt Lake City radar (KMTX), 51 km away, was scanning. The volume nearest the first event began at 00:01 UTC.
2 thunderstorm wind. Local standard time, as filed.
Three sheds were destroyed and one milk-barn was damaged.
A large tree was uprooted by strong winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2007Every state in 2007This day in weather historyWarnings in Utah, August 2007
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: 55538, 55539.