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 Sep 6, 2:55 PM MST, 2 hours 5 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 355 PM MDT SAT SEP 6 2003 .SYNOPSIS...A WEAK UPPER LEVEL LOW WILL MOVE EAST OF THE GREAT BASIN TONIGHT. WEAK HIGH PRESSURE AND A DRIER AND MORE STABLE AIRMASS WILL MOVE INTO THE REGION FROM THE WEST ON SUNDAY. A COLD FRONT WILL MOVE INTO UTAH ON MONDAY BUT WILL BE MAINLY DRY. .DISCUSSION...VARIOUS CIRCULATIONS WILL BE AFFECTING THE FORECAST AREA THIS EVENING BUT THE WHOLE MESS IS EXPECTED TO SHEAR OUT TO THE EAST AND NORTHEAST AFTER MIDNIGHT AS THE WEAK SHORT WAVE RIDGE NOW OVER WRN NV MOVES INTO THE GREAT BASIN. ACTIVE CONVECTION THIS EVENING SHOULD DIE OFF BY MIDNIGHT WITH A FEW CELLS LINGERING OVER THE EAST INTO THE EARLY MORNING HOURS. IT APPEARS THAT THE RIDGE SUNDAY SHOULD BE STRONG ENOUGH TO PREVENT MUCH CONVECTION FROM DEVELOPING BUT ISOLATED CELLS ARE POSSIBLE OVER THE MTNS IN THE AFTERNOON. 12Z ETA WANTED TO TAP INTO MOISTURE FROM THE REMNANTS OF TROPICAL STORM KEVIN AND HOOK THIS MOISTURE INTO THE COLD FRONT FOR MONDAY. THE GFS WASNT QUITE AS EXCITED ABOUT THIS BUT IT STILL IMPLIED THERE COULD BE SOME CONNECTION. 18Z ETA HAS BACKED OFF FROM THIS IDEA QUITE A BIT ALTHO IT STILL WANTS TO TAP A LITTLE OF THIS MOISTURE AT LOWER LEVELS BEFORE THE FRONT MAKES IT INTO UT. SO HAVE BUMPED POPS A LITTLE FOR MON AND EXTENDED THEM INTO THE SOUTH DURING THE AFTERNOON. THIS FRONT DOESNT REALLY MAKE IT INTO THE FAR SOUTH BEFORE IT STALLS OUT...AND THIS STALLED BOUNDARY COMBINED WITH WHAT LITTLE MOISTURE DOES COME UP FROM THE SOUTHWEST KEEPS A LOW THREAT OF PRECIP GOING ALONG THE SOUTHERN BORDER TUE WITH CONVECTION POSSIBLE OVER THE SOUTHERN AND CENTRAL MTNS TUE AFTERNOON. WED SHOULD BE AN IN BETWEEN DAY THEN THE NEXT COLD FRONT SAGS INTO NRN UT THU. LATEST GFS DEVELOPS A CLOSED SYSTEM OVER NRN UT BY FRI THAT HANGS AROUND INTO THE WEEKEND. LEFT POPS PRETTY MUCH AS THEY WERE THRU THE EXTENDED BUT PUSHED THEM A BIT FARTHER SOUTH ON THU. SLC 3--2 CDC 2--1 WILENSKY .SLC...NONE.
IDZ024-025-UTZ001>021-WYZ021-071300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 AM MDT SAT SEP 6 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... SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
The Cedar City radar (KICX), 190 km away, was scanning. The volume nearest the first event began at 00:04 UTC.
1 flash flood. Local standard time, as filed.
A thunderstorm dropped 0.94 inches of rain in 30 minutes in Hanksville, producing flash floods east of town on Bull Creek.
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, September 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: 5327870.