1 thunderstorm wind, 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 Jul 23, 2:23 PM MST, 3 hours 52 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 323 PM MDT WED JUL 23 2003 .SYNOPSIS...A VERY WARM AIRMASS WILL REMAIN OVER UTAH THROUGH THE WEEKEND WITH AREAS OF INSTABILITY. .DISCUSSION...LOTS OF CUMULUS TODAY POKING UP THROUGH SMOKY SKIES. SMOKE OVER THE GSL BASIN CAME FROM LARGE WILDFIRES IN CENTRAL IDAHO. CONVECTION FORMING OVER THE HIGH TERRAIN CURRENTLY AND WILL MOVE INTO THE BASINS OVERNIGHT. UPPER LEVEL HIGH WILL BE SHIFTING EAST THE NEXT FEW DAYS. THAT WILL CAUSE UPPER LEVEL FLOW TO COME AROUND TO THE SOUTHWEST SO WE SHOULD HAVE A DECENT AMOUNT OF MOISTURE FOR DAILY CONVECTION THROUGH EARLY NEXT WEEK. SOUTH WINDS WILL ALSO INCREASE SOME THURSDAY. SLC 1332 CDC 3322 GIBSON .SLC...NONE.
IDZ024-025-UTZ001>021-WYZ021-DDHHMM- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 AM MDT WED JUL 23 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN... THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. WCJIN-WYSW
The Salt Lake City radar (KMTX), 107 km away, was scanning. The volume nearest the first event began at 01:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm microburst winds gusting to 59 mph (51 kts) were recorded at the Simpson Springs Dugway mesonet site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2003Every state in 2003This day in weather historyWarnings in Utah, July 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: 5380327.