1 tornado, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 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, 9:00 AM MST, 4 hours 20 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1000 AM MDT FRI AUG 22 2003 .SYNOPSIS...A MOIST AND UNSTABLE AIRMASS WILL REMAIN OVER THE AREA THROUGH TONIGHT. A DRIER WEST TO SOUTHWESTERLY FLOW WILL GRADUALLY SETTLE IN ACROSS THE NORTHWEST LATE SATURDAY AND INTO THE SOUTH BY LATE SUNDAY. .DISCUSSION...CIRCULATION NOW OVER WEST CENTRAL CALIFORNIA WILL CONTINUE TO LIFT NORTHEAST TODAY AS JET STREAM CONTINUES AROUND THE BOTTOM OF TROUGH AND MOVES RAPIDLY ACROSS NEVADA AND NORTHWEST UTAH. JET STREAM IS IN THE 70-75 KNOT RANGE AT 00Z AT HINTS AT AROUND 40 KNOTS OF SHEAR BETWEEN 850-400 MB OVER NORTHWESTERN PORTIONS OF THE STATE. ATMOSPHERE REMAINS QUITE MOIST AT THIS TIME WHICH CREATES THE POSSIBILITY OF SEVERE WEATHER. SPC HAS NORTHWESTERN UTAH...WEST OF A LINE FROM THE NEVADA BORDER WEST OF CEDAR CITY TO KEMMERER WYOMING...UNDER A SLIGHT CHANCE FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND THIS LOOKS REASONABLE. FARTHER SOUTH AND EAST THE WINDS ALOFT HAVE INCREASED SIGNIFICANTLY ON THE NEW ETA RUN. THIS WOULD DECREASE THE POSSIBILITY OF FLASH FLOODING...ALTHOUGH THIS IS NOT ENOUGH OF A REASON TO CANCEL THE WATCH AT THIS TIME. PWS REMAIN HIGH TODAY FOR THE FLASH FLOOD PRONE AREAS OF THE SOUTH SO WILL MONITOR SITUATION AND MAKE DETERMINATION THIS AFTERNOON. NEW ETA ALSO SUGGESTS RAPID DRYING AT 500MB AFTER 00Z OVER NORTHWEST UTAH. THIS COULD END THUNDERSTORM ACTIVITY A BIT EARLIER OVER THE NORTHWEST BUT WILL HAVE TO WAIT AND SEE HOW IT PLAYS OUT. THE TROUGH WILL CONTINUE TO LIFT OUT ACROSS NORTHERN UTAH THROUGH SATURDAY NIGHT LEAVING MUCH OF UTAH UNDER FAVORABLE LIFT FOR SCATTERED SHOWERS AND THUNDERSTORMS INTO SATURDAY EVENING. THE EXCEPTION WILL BE THE NORTHWEST CORNER WHERE DRYING IS FORECAST. NO UPDATES NEEDED AT THIS TIME. SLC 464 CDC 565 YOUNG .SLC...FLASH FLOOD WATCH SOUTH CENTRAL UTAH NOON UNTIL 10 PM TONIGHT.
IDZ024-025-UTZ001>021-WYZ021-231300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 605 AM MDT FRI AUG 22 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY DEEP MOISTURE AND INCREASING WINDS ALOFT OVER NORTHWESTERN THIRD OF UT AND SOUTHERN ID WILL LEAD TO STRONG THUNDERSTORMS THIS AFTERNOON THAT COULD PRODUCE HEAVY RAINFALL...HAIL...AND/OR DAMAGING WINDS. SLOWER MOVING THUNDERSTORMS OVER EASTERN PORTIONS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAIN WHICH MAY PRODUCE FLASH FLOODING. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY DEEP MOISTURE WILL REMAIN OVER ALL BUT THE EXTREME NORTHWEST PORTION OF UT AND SOUTHERN ID SATURDAY. STRONG THUNDERSTORMS ARE EXPECTED OVER THE NORTHERN HALF OF UTAH AND SOUTHWEST WYOMING. FLASH FLOODING IS POSSIBLE OVER THE PORTIONS OF UTAH. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURE.
IDZ024-025-UTZ001>010-014>017-WYZ021-222230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1135 AM MDT FRI AUG 22 2003 ...STRONG THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING... A MOIST AND UNSTABLE AIR MASS OVER THE STATE TODAY WILL INTERACT WITH AN UPPER LEVEL DISTURBANCE LIFTING UP ACROSS WESTERN UTAH THIS AFTERNOON. THIS WILL PROVIDE A FAVORABLE ENVIRONMENT FOR THE DEVELOPMENT OF ISOLATED STRONG THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING. STRONG THUNDERSTORMS MAY PRODUCE DAMAGING WIND... HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING. THE GREATEST POTENTIAL FOR STRONG STORMS WILL BE IN THE WESTERN PORTIONS OF THE STATE... MAINLY TO THE WEST OF I-15. EVERYONE IN THESE AREAS IS URGED TO MAINTAIN A HEIGHTENED AWARENESS OF THE WEATHER TODAY. MONITOR YOUR FAVORITE SOURCE OF WEATHER INFORMATION FOR THE LATEST UPDATES AND FOR ANY SEVERE WEATHER WATCHES OR WARNINGS. IN ADDITION...A FLASH FLOOD WATCH IS IN EFFECT FOR A PORTION OF SOUTHEAST UTAH UNTIL 1000 PM MDT TONIGHT.
The Salt Lake City radar (KMTX), 176 km away, was scanning. The volume nearest the first event began at 20:20 UTC.
1 tornado. Local standard time, as filed.
A small tornado touched down near State Route 28 between Levan and Yuba Lake in Juab County. A UHP Trooper reported that the width was 100 feet, and that it stayed on the ground for one minute, picking up rocks and shrubs before dissipating.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2003Every state in 2003This day in weather historyThe tornado archive for Utah, 2003Warnings in Utah, August 2003
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: 5380008.