1 thunderstorm wind, 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 9, 1:50 PM CST, 3 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 250 PM CDT SAT AUG 9 2003 CONV IDUCED S/W OVR ERN ND MAY PUSH TRW INTO NRN CWA THIS EVE BEFORE WEAKENING. HAVE KEPT A CHC IN ACRS N FOR ERLY THIS EVE. NEXT S/W WL AFFECT CWA AFT MIDNIGHT WITH BEST CHC ACRS NRN CWA. ETA IS MORE IN LINE WITH PREV AND CURRENT GFS WITH THIS FEATURE SO WL FOLLOW GFS MORE CLOSELY. THIS S/W WL BE SLOW TO EXIT S/W ON SUN SO WL NEED TO KEEP A CHC OF TRW ACRS N IN THE MORN...AND ACRS S INTO THE AFTN AND ERLY EVE. CLOUD COVER AND PSBL RAIN COOLED AIR WL HOLD TEMPS DOWN ON SUN SO HAVE CUT BACK A FEW DEG...ESPEC ERN CWA. ON MON...GFS STILL KEEP ERN CWA UNSTABLE WITH COOLER POCKET OF AIR AT H7. THIS MAY BE ENUF TO TRIGGER ISOLD AFTN TRW E OF I29...BUT FOR NOW WL KEEP DRY. WITH COOLER AIR ALOFT AND EXPECTED CU DEVELOPMENT...ERN CWA WL SEE HIGH ON MON SIMILAR TO SUN...WITH SLIGHTLY WARMER TEMPS W. REST OF WEEK LOOKS DRY WITH INCREASING HEAT AND HUMIDITY AS RIDEGE DEVELOPS OVR PLAINS. BY SAT...WAVE BREAKS DOWN OVR TOP OF RIDGE BRINGING A CHC OF MAINLY NIGHT TIME TRW TO CWA. .FSD...NONE
SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-IAZ001>003- 012>014-020>022-031-032-NEZ013-014-101200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1100 AM CDT SAT AUG 09 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... A FEW THUNDERSTORMS MAY DEVELOP LATE THIS AFTERNOON IN THE CHAMBERLAIN VICINITY AS A WEAK COLD FRONT APPROACHES. THESE STORMS MAY PRODUCE DIME TO NICKEL SIZE HAIL AND SOME STRONG WIND GUSTS. DURING THE EVENING HOURS...AN UPPER LEVEL STORM SYSTEM WILL MOVE ACROSS THE AREA RESULTING IN ANOTHER CHANCE OF THUNDERSTORM ACTIVITY. AGAIN SOME OF THESE STORMS...ESPECIALLY IN SOUTHEAST SOUTH DAKOTA...MAY PRODUCE DIME SIZE HAIL AS MIDDLE ATMOSPHERIC TEMPERATURES REMAIN RELATIVELY COOL. HOWEVER...THE VERTICAL WIND PROFILE ISNT FAVORABLE SO THE ACTIVITY ISNT EXPECTED TO BE WIDESPREAD. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE ON SUNDAY...MAINLY SOUTH OF A MARSHALL TO CHAMBERLAIN LINE. THE WEAK COLD FRONT WILL STALL ACROSS THE AREA DURING THE AFTERNOON. THE RESULTANT AIR CONVERGENCE AND INCREASING INSTABILITY FROM THE HEATING OF THE DAY WILL CAUSE THUNDERSTORMS TO DEVELOP LATE SUNDAY AFTERNOON INTO THE EVENING. AS WITH TODAY...THE ACTIVITY IS EXPECTED TO BE SCATTERED ACROSS THE TRI STATE AREA. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE WITH SOME OF THE STORMS THAT DEVELOP. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 5 PM WEST OF A BROOKINGS TO WAGNER LINE. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. HEITKAMP
The Aberdeen radar (KABR), 129 km away, was scanning. The volume nearest the first event began at 22:54 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds caused tree damage, including several trees down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2003Every state in 2003This day in weather historyWarnings in South Dakota, 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: 5375205.