1 thunderstorm wind, 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 May 17, 9:15 AM MST, 4 hours 45 minutes earlier.
UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1015 AM MDT SAT MAY 17 2003 .SYNOPSIS...MID AND HIGH LEVEL MOISTURE WILL STREAM ACROSS THE AREA IN SOUTHWESTERLY FLOW ALOFT TODAY AND SUNDAY. A SERIES OF WEAK DISTURBANCES WILL ALSO MOVE ACROSS IN THIS FLOW. .DISCUSSION...NO PROBLEMS WITH THE FORECASTS THIS MORNING AND NO SURPRISES IN THE NEW ETA. MID TO HIGH LEVEL MOISTURE FROM THE SUBTROPICAL PACIFIC HAS SURGED ACROSS THE AREA OVERNIGHT AND WILL BE A FACTOR FOR THE NEXT 36 HOURS OR SO. DURING THAT TIME WE WILL SEE THE TYPICAL MOISTENING FROM THE TOP DOWN WHICH WILL PROVIDE A DEEPER MOIST LAYER SUNDAY AFTERNOON THAN TODAY. HOWEVER INSTABILITY VERY LIMITED TODAY AND WONT BE HELPED BY THE EXTENSIVE CLOUD COVER CUTTING OFF SOLAR HEATING. ETA DOES SHOW A BETTER BAND OF INSTABILITY OVER THE SOUTHERN SECTION OF THE AREA TOMORROW AND THAT LOOKS GOOD. SO BIG QUESTION FOR TODAY IS HOW MUCH IF ANY CONVECTION WILL BE ABLE TO FIRE. FAST MOVING JET LEVEL RIPPLES...THE MOST WELL DEFINED ABOUT ON THE SOUTHERN CA COAST AT THIS TIME...COULD HELP A BIT AND THE ONE NEAR THE COAST MOVES ACROSS OUR AREA DURING THE EVENING HOURS. THERE ALSO APPEARS TO BE A WAVE JUST COMING UP ON THE SOUTHERN NV/CA BORDER THAT WOULD MOVE ACROSS OUR SOUTHERN SECTIONS THIS AFTERNOON. SO THE CURRENT PACKAGE WITH A SLIGHT CHANCE IN MOST VALLEYS AND A CHANCE IN THE MOUNTAINS FROM ABOUT SLC SOUTHWARD LOOKS GOOD AND NO UPDATES PLANNED AT THIS TIME. BUT WILL KEEP A EYE ON THE POSSIBILITY OF ISOLATED ACTIVITY POPPING ALONG THE COLD FRONT AND ALSO THE POSSIBILITY THAT SOME COULD DRIFT INTO THE TWO SOUTHEAST ZONES THAT DONT HAVE ANY MENTION BY THIS EVENING. THE SECOND MAJOR FACTOR IN THE FORECAST IS THE COLD FRONT THAT IS CURRENTLY ALONG THE NORTHERN EDGE OF OUR AREA. IT DOESNT MOVE MUCH DURING THE DAY BUT THEN STARTS PUSHING SOUTH OVERNIGHT AND THROUGH THE DAY SUNDAY AS THE COLD SHORTWAVE JUST WEST OF VANCOUVER ISLAND MOVES EAST ACROSS THE ROCKIES. THE ETA SUGGESTS THE FRONT WILL PASS SLC SHORTLY AFTER MIDNIGHT AND BE OVER SOUTHERN UT BY SUNDAY AFTERNOON. THE ETA CONTINUES TO GENERATE A BAND OF PRECIP ALONG THE FRONTAL BOUNDARY SUNDAY STARTING FROM THE WESTERN UINTAS TO WEST OF MLF BY MIDDAY THEN BEING NEAR THE SOUTHEAST EDGE OF OUR FORECAST AREA BY 06Z MONDAY. SLC 21- CDC 222 SANDERS .SLC...NONE.
IDZ024-025-UTZ001>021-WYZ021-181300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 730 AM MDT SAT MAY 17 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. WCJIN-WYSW
The Cedar City radar (KICX), 158 km away, was scanning. The volume nearest the first event began at 21:13 UTC.
1 thunderstorm wind. Local standard time, as filed.
A microburst wind gust to 58 mph (50 kts) was measured at Signal Peak near Richfield as a cold front moved through the area.
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, May 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: 5379923.