1 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 Sioux Falls, SD wrote its last area forecast discussion before the first event at May 31, 2:56 AM CST, 3 hours 4 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 356 AM CDT MON MAY 31 2004 .DISCUSSION... MAIN WEATHER PROBLEM FOR TODAY WILL LIKELY BE WIND. PROFILERS SHOWING 35 TO 40 KNOTS AT MRR AND NLG FROM 500M TO 1500M EARLY THIS MORNING. THIS MATCHES UP FAIRLY WELL WITH LATEST ETA PROGS AND BUFKIT SOUNDINGS SUGGEST THAT THE MIXED LAYER WILL SUPPORT SUSTAINED WINDS AROUND 30 MPH WITH GUSTS AROUND 45 MPH. SO...WILL ISSUE A WIND ADVISORY FOR EVERYONE FOR TODAY. WITH ONLY MODEST PRESSURE RISES AND WEAK COLD ADVECTION...THIS SHOULD BE A GENERALLY LOW END ADVISORY. THE EXCEPTION COULD BE THE NORTHERN CWA WHERE A BACK DOOR COLD FRONT DROPS IN LATE AFTERNOON WITH DECENT PRESSURE RISES. ANTICIPATE QUITE A BIT OF MORNING SUN...ESPECIALLY SOUTHWEST CWA...AND THIS SHOULD NOT ONLY INCREASE CHANCE FOR BETTER MIXING...BUT WILL ALSO ALLOW FOR A MILD DAY...ALTHOUGH STILL BELOW NORMAL. COOLEST TEMPERATURES WILL BE OVER THE NORTH WHERE CLOUDS WILL INCREASE AND PRECIPITATION CHANCES WILL BE BEST. FOR PRECIPITATION...WILL NOT MAKE A WHOLE LOT OF CHANGES TO THE GOING FORECAST OF COVERAGE OR TIMING. MAINLY A LATE AFTERNOON INTO EVENING CHANCE...WITH HIGHEST POPS OVER THE NORTHEAST. A LITTLE CONCERNED THAT SOME OF THIS PRECIP COULD HANG IN MUCH OF THE NIGHT OVER THE NORTHEAST CWA...SO WILL UP POPS A BIT TONIGHT THERE...AND CONTINUE INTO THE OVERNIGHT HOURS WITH GOOD MOISTURE CONVERGENCE AND MINIMAL UPPER LEVEL SUPPORT. WILL ALSO LEAVE POPS IN FOR TUESDAY AS WEAK SHORTWAVE ROTATES THROUGH CWA AND RESIDUAL MOISTURE FROM INCOMING COLD FRONT STILL LINGERING. AFTER THIS...STRONG WESTERLIES PROGGED TO SET UP FOR THE LATTER PART OF THE WEEK...WHICH WILL LIKELY MEAN FOR UNSETTLED WEATHER. CURRENTLY HAVE POPS IN FOR LATE THURSDAY INTO FRIDAY...AND WILL LIKELY NEED THEM INTO THE WEEKEND. WILL LET DAY SHIFT PERUSE THE ENSEMBLE DATA AND OTHER MODELS WHEN THEY BECOME AVAILABLE AND MAKE ANY OF THESE POTENTIAL CHANGES. && .FSD...WATCHES/WARNINGS/ADVISORIES... SD...WIND ADV ALL COUNTIES FOR TODAY. MN...WIND ADV ALL COUNTIES FOR TODAY. IA...WIND ADV ALL COUNTIES FOR TODAY. NE...WIND ADV ALL COUNTIES FOR TODAY. && 08
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 559 AM CDT MON MAY 31 2004 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-011200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 559 AM CDT MON MAY 31 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP DURING THE AFTERNOON. WHILE SEVERE WEATHER IS NOT EXPECTED...SOME OF THESE THUNDERSTORMS COULD PRODUCE SMALL HAIL...LIGHTNING AND BRIEF HEAVY RAIN. FLOODING... HEAVY RAINFALL SATURDAY EVENING HAS LED TO SOME MINOR FLOODING ALONG PARTS OF THE LOWER VERMILLION RIVER...SKUNK CREEK... AND THE LOWER BIG SIOUX RIVER IN FAR SOUTHEAST SOUTH DAKOTA AND FAR NORTHWEST IOWA. RAINFALL OF 3 TO 6 INCHES WAS REPORTED IN AND AROUND SIOUX FALLS OVERNIGHT...WITH 1 TO 3 INCHES OVER MUCH OF SOUTHEAST SOUTH DAKOTA EAST OF THE JAMES RIVER. THE HIGH WATER WILL CONTINUE TO RECEDE OVER THE NEXT COUPLE OF DAYS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK. 08
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Runoff from heavy rain upstream caused flooding of the Big Sioux River, with farmland and other fields flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2004Every state in 2004This day in weather historyWarnings in South Dakota, May 2004
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: 5402545.