1 flash flood, 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 15, 7:55 PM MST, 55 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 855 PM MDT FRI AUG 15 2003 .SYNOPSIS...A MOIST AND UNSTABLE AIRMASS WILL REMAIN OVER THE AREA THROUGH SATURDAY. A NORTHERLY FLOW WILL DEVELOP ON SUNDAY AND THIS WILL GRADUALLY DRY THE AREA OUT FROM THE NORTHWEST. .DISCUSSION...STILL WIDESPREAD RADAR RETURNS OVER WESTERN UT FROM ABOUT PVU SOUTHWARD AND SOME ACTIVITY APPROACHING THE SOUTHEAST EDGE OF OUR AREA FROM CO. BUT THE INTENSITY OF ALL OF IT IS MUCH WEAKER THAN EARLIER TODAY AND EXPECT THAT THE WEAKENING TREND WILL CONTINUE. THE ONLY CONCERN FOR STRONGER ACTIVITY WOULD BE IN THE EAST CENTRAL BASIN WHERE IT WAS SUNNY THIS AFTERNOON AND THERE HASNT BEEN ANY CONVECTION TO COOL THE LOWER LAYERS. EVEN SO IT ISNT LIKELY TO HAVE MORE THAN ISOLATED STRONG CELLS REDEVELOP. SO PLAN TO KILL THE FLASH FLOOD WATCH AT 9 PM/03Z. WILL BE UPDATING ZONES TO REFLECT THAT AND TO LOWER OR REMOVE THREATS FOR TONIGHT FOR AREAS FROM ABOUT SLC NORTHWARD. SLC 1552 CDC 5553 SANDERS .SLC...FLASH FLOOD WATCH CANCELED AT 03Z.
IDZ024-025-UTZ001>021-WYZ021-161300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 AM MDT FRI AUG 15 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY SHOWERS AND THUNDERSTORMS ARE LIKELY ACROSS MOST OF SOUTHERN AND EASTERN UTAH THROUGH THIS EVENING. LOCALLY HEAVY RAINFALL IS POSSIBLE OVER THE SOUTH CENTRAL AND SOUTHEAST PORTIONS OF THE STATE. A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THOSE AREAS THROUGH MIDNIGHT TONIGHT. SEE THE LATEST FLOOD WATCH (SLCFFASLC) ISSUED BY THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY FOR ADDITIONAL DETAILS. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAINFALL...ARE EXPECTED AGAIN OVER THE WEEKEND. DRIER AND WARMER AIR WILL MOVE IN FROM THE WEST EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURE.
The Cedar City radar (KICX), 66 km away, was scanning. The volume nearest the first event began at 03:47 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms caused flash flooding in Fort Pierce Wash near St. George with water running over bridges and closing roads.
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, 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: 5380004.