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 8, 2:47 PM MST, 3 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 347 PM MDT FRI AUG 8 2003 .SYNOPSIS...SOUTHWEST FLOW ALOFT WILL PREVAIL OVER THE AREA THROUGH THE WEEKEND. MOISTURE OVER SOUTHERN AND EASTERN UTAH WILL GRADUALLY SPREAD OVER THE REMAINDER OF THE AREA TODAY AND SATURDAY. .DISCUSSION...STARTING TO SEE SOME HEAVY RAIN PRODUCING CELLS IN CENTRAL UTAH. ISSUED A FLS FOR NORTHWEST GARFIELD COUNTY WHERE STORMS HAVE BEEN TRAINING OVER THE SAME AREA FOR A FEW HOURS. WORKING ON A FFW FOR GULCHES SOUTH OF CAINEVILLE. RIDGE ALOFT BUILDS OVER UTAH THE NEXT FEW DAYS WHICH PUSHES THE JET AND STRONGER MID LEVEL FLOW AWAY FROM THE AREA. THE RIDGE WILL BE MOIST WITH DAILY CONVECTION AND A MODERATE HAZARD OF FLASH FLOODING IN THE SOUTHERN AREAS. SLC 1111 CDC 1111 GIBSON .SLC...SMALL STREAM FLOOD ADVISORY UNTIL 500 PM FOR NORTHWEST GARFIELD COUNTY.
IDZ024-025-UTZ001>021-WYZ021-091300- HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE SALT LAKE CITY UT 350 PM MDT FRI AUG 8 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY THUNDERSTORMS OVER SOUTHERN UTAH ARE PRODUCING LOCAL HEAVY RAIN. THERE IS A MODERATE RISK OF FLASH FLOOD THOUGH THIS EVENING. .DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY THUNDERSTORMS WILL CONTINUE THROUGH THE WEEKEND WITH THE POTENTIAL FOR FLASH FLOODING...MAINLY OVER SOUTHERN UTAH. WCJIN-WYSW
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
Thunderstorm downpours brought flash flooding to east Capitol Reef National Park in the Sandy and Pleasant Creek drainage areas.
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: 5379883.