1 lightning, 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 Apr 22, 8:25 AM CST, 3 hours 5 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 925 AM CDT SUN APR 22 2001 HAVE UPDATED FCST TO INCLUDE WATCH FURTHER SW ALONG MO RIVER. SFC FNT FURTHER S ACRS SERN NEB AND MAY NOT MAKE IT AS FAR N AS NW IA THIS AFTN AS PREV MODELS INDICATED. STILL FAR SER CWA STILL UNDER GUN FOR SVR WX AS BNDRY WL BE CLOSE BY 00Z. HAVE LOWERED TEMS FOR THIS AFTN MOST PLACES WITH THE COOL E NELY LOW LEVEL FLOW AND PRECIP. .FSD...WINTER STORM WATCH TONIGHT FAR WRN CWA
SIGNIFICANT WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1048 AM CDT SUN APR 22 2001 *** THIS SIGNIFICANT WEATHER OUTLOOK FROM THE NATIONAL WEATHER SERVICE PERTAINS ONLY TO CONDITIONS ASSOCIATED WITH THUNDERSTORMS. *** .SYNOPSIS... .STRONG LOW PRESSURE OVER EASTERN COLORADO WILL MOVE NORTHEAST INTO EASTERN NEBRASKA THIS EVENING. A WARM FRONT OVER SOUTHERN NEBRASKA WILL ALSO LIFT NORTHEAST INTO NORTHERN IOWA DURING THIS TIME PERIOD. AS IT DOES...STRONG TO POSSIBLY SEVERE STORMS WILL DEVELOP OVER EASTERN NEBRASKA THIS AFTERNOON AND MOVE NORTHEAST INTO NORTHWEST IOWA LATE THIS AFTERNOON OR EVENING. THE POTENTIAL DOES EXIST FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS OVER NORTHWEST IOWA LATER THIS AFTERNOON AND EVENING. SDZ038-039-050-052>054-057>060-063>065-068-230500- BEADLE-KINGSBURY-JERAULD-SANBORN-MINER-BRULE-AURORA-DAVISON-HANSON- GREGORY-CHARLES MIX-DOUGLAS-HUTCHINSON-BON HOMME- INCLUDING THE CITIES OF...HURON...CHAMBERLAIN...MITCHELL... 1048 AM CDT SUN APR 22 2001 * FORECAST THROUGH MIDNIGHT: SIGNIFICANT WEATHER IS NOT EXPECTED IN THIS AREA THROUGH MIDNIGHT. * SIGNIFICANT WEATHER: NONE. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS NOT ANTICIPATED. SDZ040-055-056-061-062-066-067-069-070-MNZ071-072-080-081-089-090- 097-098-IAZ001-002-012-230500- BROOKINGS-LINCOLN-LYON-LAKE-MOODY-PIPESTONE-MURRAY-COTTONWOOD-MCCOOK- MINNEHAHA-ROCK-NOBLES-JACKSON-TURNER-LINCOLN-LYON-OSCEOLA-YANKTON- CLAY-SIOUX- INCLUDING THE CITIES OF...BROOKINGS...PIPESTONE...SLAYTON...SIOUX FALLS... LUVERNE...WORTHINGTON...ROCK RAPIDS...YANKTON...SIOUX CENTER... 1048 AM CDT SUN APR 22 2001 * FORECAST THROUGH MIDNIGHT: SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE AREA THIS AFTENROON AND EVENING. SOME OF THE STORMS WILL PRODUCE PEA SIZE HAIL ALONG WITH BRIEF HEAVY RAINS. HOWEVER...SEVERE WEATHER IS NOT EXPECTED. * SIGNIFICANT WEATHER: SMALL HAIL...PEA TO MARBLE SIZE. HEAVY RAIN. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS NOT ANTICIPATED. SDZ071-IAZ003-013-014-020>022-031-032-NEZ013-014-230500- DICKINSON-UNION-OBRIEN-CLAY-PLYMOUTH-CHEROKEE-BUENA VISTA-DIXON-DAKOTA- WOODBURY-IDA- INCLUDING THE CITIES OF...SPIRIT LAKE...SPENCER...LE MARS...STORM LAKE... SIOUX CITY... 1048 AM CDT SUN APR 22 2001 * FORECAST THROUGH MIDNIGHT: SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE NORTHEAST ACROSS THE AREA THIS AFTERNOON AND MAY BECOEM SEVERE AFTER 4 PM. THE POTENTIAL EXISTS FOR THE DEVELOPMENT OF TORNADOES THIS EVENING SOUTHEAST OF A SIOUX CITY TO SPIRIT LAKE LINE. * SIGNIFICANT WEATHER: SEVERE WINDS...GUSTS EQUAL TO OR GREATER THAN 58 MPH. LARGE HAIL...DIME SIZE OR LARGER. TORNADOES POSSIBLE. * SPOTTER ACTIVATION: SPOTTER ACTIVATION IS POSSIBLE AFTER 400 PM.
The Sioux Falls radar (KFSD), 87 km away, was scanning. The volume nearest the first event began at 17:30 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a house, causing a fire which destroyed the house.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2001Every state in 2001This day in weather historyWarnings in South Dakota, April 2001
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: 5242708.