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 16, 2:34 PM MST, 3 hours 26 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 334 PM MDT SAT AUG 16 2003 .SYNOPSIS...A MOIST AND UNSTABLE AIRMASS WILL REMAIN OVER THE AREA THROUGH TONIGHT. A NORTHERLY FLOW WILL DEVELOP LATE TONIGHT AND CONTINUE INTO MONDAY. THIS WILL GRADUALLY DRY THE AREA OUT FROM THE NORTHWEST. .DISCUSSION...HEAVY RAIN PRODUCING CELLS SCATTERED AROUND THE AREA. ALSO SMALL HAIL REPORTED. SOUTHERN UTAH SLOW TO GET GOING AFTER CLOUDY MORNING. ANTECEDENT CONDITIONS ARE WETTEST DOWN SOUTH SO WILL CONTINUE THE FF WATCH FOR THAT AREA. NO 18Z ETA AVAILABLE YET. AIRMASS BEGINS TO SLOWLY DRY AND STABILIZE NEXT FEW DAYS. AVN HAS WASHINGTON CUT-OFF LOW PASSING MOSTLY EAST OF UTAH WHILE ETA BRINGS IT RIGHT OVER KSLC MONDAY. BUMPED UP POPS SLIGHTLY NORTHEAST PORTIONS FOR SUNDAY AFTERNOON AND MONDAY BUT NOT CONVINCED LOW WILL COME THAT CLOSE. MORE MODEL GYRATIONS ARE LIKELY THOUGH GIVEN CUT-OFF NATURE OF THAT CIRCULATION. NO CHANGES IN THE EXTENDED EXCEPT COOLED TEMPERATURES SLIGHTLY. MONSOON PATTERN CONTINUES THROUGH DAY SEVEN. SLC 4221 CDC 4221 GIBSON .SLC...FLASH FLOOD WATCH FOR SOUTHERN AND EASTERN UTAH UNTIL 900 PM TONIGHT.
IDZ024-025-UTZ001>021-WYZ021-171300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 AM MDT SAT AUG 16 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY THERE IS A THREAT OF FLASH FLOODING OVER SOUTHERN AND EASTERN UTAH TODAY AND THIS EVENING WHERE A FLASH FLOOD WATCH IS IN EFFECT UNTIL 900 PM MDT. SEE THE LATEST FLOOD WATCH ISSUED BY THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY...SLCFFASLC...FOR DETAILS. .DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURE.
The Salt Lake City radar (KMTX), 201 km away, was scanning. The volume nearest the first event began at 01:01 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms produced heavy rain and flash flooding between Duchesne and Fruitland along Highway 40
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: 5380005.