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 14, 2:35 PM MST, 40 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 335 PM MDT THU AUG 14 2003 .SYNOPSIS...A MOIST AND UNSTABLE AIRMASS WILL BE OVER THE AREA TONIGHT THROUGH THE WEEKEND. .DISCUSSION...CONVECTION SO FAR TODAY HAS BEEN LIMITED TO THE HIGHER TERRAIN AND MAINLY OVER THE NORTH. THE NORTHEAST FLOW ALOFT THAT HAS SPREAD INTO THE SOUTHEAST HAS SUPPRESSED ACTIVITY BUT I STILL EXPECT ISOLATED CELLS TO DEVELOP THIS EVENING AND LINGER WELL INTO THE NIGHT. CONVECTION SHOULD ALSO PERSIST INTO TONIGHT OVER THE MTNS AND WESTERN VALLEYS. ALTHOUGH WE DEVELOP LOCAL HIGH PRESSURE AT THE SURFACE ALONG THE WASATCH FRONT THIS EVE DUE TO THE PRECIP...THIS SHOULD WEAKEN ENOUGH BY MORNING TO ALLOW SEVERAL MILLIBARS OF SYNOPTIC SCALE GRADIENT TO DEVELOP BETWEEN CENTRAL WYO AND NRN UT AND COMBINE WITH 20-30 KT 700 MB EAST WINDS TO GENERATE A LOCAL CANYON WIND EVENT ALONG THE NORTHERN AND CENTRAL WASATCH FRONT. DONT EXPECT AN ADVISORY LEVEL EVENT BUT IT WILL BE LOCALLY WINDY. ALL SUPPORT ENDS BY FRIDAY AFTERNOON AND WINDS SHOULD TOO. EXPECT THE EAST TO BE MORE ACTIVE TOMORROW ONCE THE FLOW VEERS AROUND TO SOUTHERLY AFTER THE INVERTED TROF PASSES WITH THIS ACTIVITY SPREADING INTO THE REMAINDER OF THE AREA BY LATE IN THE DAY. THE MOIST AIRMASS WILL BE IN PLACE AND WITH THE WEAK TROF OVER WESTERN UT...IT SHOULD STAY QUITE ACTIVE ON SAT. THIS BECOMES A CYCLONIC SHEAR AXIS SUN THEN LATEST GFS REFORMS A LOW ALONG THE SOUTHERN UT BORDER MON AND THIS GRADUALLY DRIFTS NORTHWARD THROUGH THE STATE. MOISTURE WILL STILL BE AVAILABLE THROUGH THIS PERIOD SO WILL KEEP CHANCE POPS GOING THROUGH TUE. SUPPOSEDLY WE WILL START TO DRY AGAIN WED THROUGH THE END OF THE WEEK SO HAVE TRENDED DOWN POPS BUT DONT HAVE A LOT OF CONFIDENCE IN THIS SOLUTION. SLC 5445 CDC 5555 WILENSKY .SLC...NONE.
IDZ024-025-UTZ001>021-WYZ021-151300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 700 AM MDT THU AUG 14 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO-THIRDS OF UTAH...EXTREME SOUTHEAST IDAHO AND EXTREME SOUTHWEST WYOMING .DAY ONE... TODAY DEEP MOISTURE AND LIGHT WINDS WILL ALLOW SLOW MOVING THUNDERSTORMS TO PRODUCE LOCAL HEAVY RAIN OVER MUCH OF SOUTHERN AND CENTRAL UTAH TODAY. THE GREATEST RISK APPEARS TO BE EAST OF HIGHWAY 89 AND SOUTH OF PRICE. .DAYS TWO THROUGH SEVEN... FRIDAY THROUGH WEDNESDAY A VERY MOIST AND UNSTABLE AIRMASS WILL REMAIN OVER THE AREA AT LEAST THROUGH THE WEEKEND. THUNDERSTORMS DEVELOPING IN THIS AIRMASS WILL BE ABLE TO PRODUCE HEAVY RAIN AND MAY BE MOVING SLOWLY ENOUGH AT TIMES TO PRODUCE FLASH FLOODING...ESPECIALLY IN DRAINAGES THAT ARE PREDOMINANTLY ROCKY AND IN AREAS WHERE FIRES HAVE REMOVED MOST OF THE VEGETATION. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURE. WCJIN-WYSW
UTZ004-008>021-142200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1040 AM MDT THU AUG 14 2003 ...LOCAL HEAVY RAINS POSSIBLE OVER SOUTHERN UTAH... A VERY MOIST AND UNSTABLE AIR MASS OVER MUCH OF SOUTHERN AND CENTRAL UTAH TODAY WILL REMAIN OVER THE AREA THROUGH AT LEAST SATURDAY. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH AFTERNOON AND EVENING...WITH SOME OF THESE PRODUCING HEAVY RAIN. THE MOVEMENT OF THE THUNDERSTORMS TODAY WILL BE TOWARDS THE WEST. THE SPEED AT WHICH THE STORMS MOVE MAY BE SLOW ENOUGH TO PRODUCE FLASH FLOODING IN SOME AREAS. THE AREA OF GREATEST RISK WOULD BE OVER AND EAST OF THE MOUNTAINS SOUTH OF ABOUT PRICE AND EAST OF HIGHWAY 89. THIS INCLUDES CAPITOL REEF NATIONAL PARK...THE GRAND STAIRCASE ESCALANTE NATIONAL MONUMENT...THE SAN RAFAEL SWELL AND THE GLEN CANYON NATIONAL RECREATION AREA INCLUDING LAKE POWELL. EVERYONE IN THESE AREAS IS URGED TO MAINTAIN A HEIGHTENED AWARENESS OF THE WEATHER TODAY AND MONITOR THEIR FAVORITE SOURCE OF WEATHER INFORMATION FOR POSSIBLE FLASH FLOOD WATCHES OR WARNINGS. THOSE HIKING OR CAMPING IN THE AREA SHOULD AVOID HIGH RISK AREAS... ESPECIALLY NARROW SLOT CANYONS WHERE NO ESCAPE ROUTES ARE AVAILABLE.
The Salt Lake City radar (KMTX), 107 km away, was scanning. The volume nearest the first event began at 22:17 UTC.
1 flash flood. Local standard time, as filed.
The Tooele County Sheriff reported 4-6 inches of water went across Highway 73 between mile marker 3 and 6.
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: 5380003.