3 thunderstorm wind, 2 hail, as filed by the National Weather Service.
Every event with a place to put it. 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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Aug 25, 2:45 PM CST, 1 hour 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 345 PM CDT MON AUG 25 2003 BAND OF MID LEVEL SHRA/TSRA CONTINUES TO SHIFT SLOWLY SOUTH ACROSS THE CWA. NOT A LOT OF RAIN REACHING THE SFC...BUT A FEW HUNDRETHS HERE AND THERE...AND WILL KEEP CHC/SCT POPS IN OVERNIGHT ACROSS THE SOUTHERN CWA. WEAK FRONT PUSHES SOUTH OF THE CWA TUESDAY MORNING... AND OTHER THAN A SLIGHT CHC OF LINGERING ACCAS TSRA IN THE FAR SOUTH EARLY...WE SHOULD BE DRY AND WARM WITH A DECENT AMOUNT OF SUNSHINE ON TUESDAY. WEAK HIGH PRESSURE PUSHES QUICKLY EAST OF THE CWA TUESDAY NIGHT... WITH SOUTHEAST RETURN FLOW THROUGH THE DAY ON WEDNESDAY. SOUTHEAST NOT THE BEST FOR MAXIMUM MIXING...SO ONLY RAISED TEMPS A COUPLE OF DEGREES OVER TUESDAY HIGHS AT THIS POINT. BUT WILL HAVE TO WATCH THE WEST WHERE ANY WIND DIRECTION WEST OF SOUTH WILL PROMOTE GREATER MIXING AND WARMER TEMPS. HAVE INTRODUCED A SMALL POP IN THE FAR SOUTHERN COUNTIES WEDNESDAY AFTERNOON WHERE WE START TO SEE SOME RETURN OF LOW LEVEL MOISTURE. OTHERWISE STILL LOOKING AT CHANCE OF TSRA LATER WEDNESDAY NIGHT THROUGH THURSDAY AS THE MAIN COLD FRONT DROPS SOUTHEAST ACROSS THE AREA. KEEPING POPS ON THE LOW CHANCE SIDE FOR NOW AS STRONGER UPPER LEVEL SUPPORT REMAINS NORTH OF OUR AREA...BUT STILL WORTH A MENTION AT THIS TIME. SIDED CLOSER TO ETA ON TIMING FRONT THROUGH THE AREA THURSDAY AFTERNOON/NIGHT...WHICH IS A LITTLE SLOWER THAN GFS. HAVE SEEN FRONT HAVE A HARD TIME PUSHING QUICKLY SOUTHEAST THIS SUMMER WHEN STRONGER ENERGY IS SLIDING WELL TO THE NORTH. REGARDLESS THE FRONT AND ANY CHANCE OF PRECIP SHOULD BE SOUTH OF THE AREA BY LATE FRIDAY MORNING...WITH COOLER AND DRIER AIR SETTLING OVER THE AREA FOR THE WEEKEND. DID NOT MAKE MANY CHANGES TO GOING LONG RANGE FORECAST AT THIS TIME. 00Z GFS TRYING TO PRODUCE DECENT AMOUNT OF PRECIP OVER SOUTHERN PARTS OF THE CWA SATURDAY THROUGH MONDAY...BUT AM HAVING A HARD TIME SEEING IT WITH COOLER HIGH PRESSURE GENERALLY OVER THE AREA...SO CONTINUED DRY FORECAST THROUGH THE LABOR DAY HOLIDAY. ALSO KEPT TEMPS A FEW DEGREES ABOVE MEX GUIDANCE...WITH COOLEST DAY EXPECTED TO BE SATURDAY WITH HIGHS MOST AREAS RIGHT AROUND 70. .FSD...NONE HACKER
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-IAZ001>003- 012>014-020>022-031-032-NEZ013-014-261200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1045 AM CDT MON AUG 25 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... A WEAK FRONT WILL BE DRAPED ACROSS THE AREA TODAY AS AN UPPER LEVEL DISTURBANCE TRACKS ACROSS THE REGION. A FEW THUNDERSTORMS MAY DEVELOP LATE THIS AFTERNOON ALONG THIS FRONT...WITH MOST OF THE ACTIVITY EXPECTED TO BE EAST OF A YANKTON TO BROOKINGS LINE. DAMAGING WIND WILL BE THE GREATEST THREAT WITH THESE STORMS. HOWEVER...LARGE HAIL AND DAMAGING WINDS MAY BE POSSIBLE ACROSS SOUTHWEST MINNESOTA AND EXTREME NORTHWEST IOWA LATE THIS AFTERNOON. ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED TONIGHT AS ANOTHER COLD FRONT SLIDES ACROSS THE AREA. DAMAGING WIND AND HAIL WILL BE THE PRIMARY THREAT WITH THESE STORMS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A CHANCE OF THUNDERSTORMS WILL DEVELOP AGAIN WEDNESDAY NIGHT INTO THURSDAY...AS A COLD FRONT MOVES SOUTH OVER THE AREA. A FEW THUNDERSTORMS COULD BECOME SEVERE AS THE FRONT MOVES THROUGH THE AREA. AT THIS TIME DAMAGING WINDS AND SMALL HAIL LOOK TO BE THE GREATEST THREAT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 6 PM CDT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. JRM
The Sioux Falls radar (KFSD), 100 km away, was scanning. The volume nearest the first event began at 21:51 UTC.
3 thunderstorm wind, 2 hail. Local standard time, as filed.
Thunderstorm winds caused tree damage, including a 12 inch diameter tree blown over.
Thunderstorm winds blew part of the roof off a woodworking business. The winds also blew down trees and power lines, resulting in power outages..
Thunderstorm winds caused tree and power line damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2003Every state in 2003This day in weather historyWarnings in Iowa, 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: 5374169, 5374170, 5374171, 5374172, 5374173.