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 Apr 21, 7:50 PM CST, 4 hours 10 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 850 PM CDT SAT APR 21 2001 AT THIS TIME WILL NOT MAKE TOO MANY DRASTIC CHANGES IN THE EVENING UPDATE. SOME BREAKS IN THE CLOUD AND RATHER LO SFC DEWPOINTS ALLOWING NRLY WINDS TO BRING IN COOL TEMPS TO THE CWA. WL NEED TO DROP TEMPS FOR OVERNIGHT LOWS A NOTCH FM PREVIOUS FCST. INTERROGATION OF THE 18Z MESOETA DOES INDICATE THAT THERE IS POTENTIAL FOR HEAVY SNOW JUST WEST OF THE JAMES RIVER SUN EVE/NIGHT. SOME DISCUSSION THIS EVENING WITHIN THE OFFICE WHETHER WE SHOULD ISSUES A WATCH. WE HAVE OPTED TO HOLD OFF ISSUANCE FOR THE WATCH FOR THE MIDNIGHT CREW...WHO WILL HAVE THE 00Z MODEL RUNS TO LOOK AT FOR BETTER CONSIDERATION OF A WATCH. WE WILL HOWEVER REISSUE A SPECIAL WEATHER STATEMENT BY 915 PM STRESSING THE PUBLIC STAY AWARE OF POSSIBLE WINTER WEATHER ADVISORIES/WARNINGS TO BE ISSUED BY EARLY SUNDAY MORNING. AND WITHOUT SAYING ALSO MENTIONING THE SVR TSTM THREAT IN SE CWA IN THE SPS. DRAMATIC BAROCLINIC ZONE TO ALSO SET UP IN THE CWA WHICH SHOULD ALSO PUT SOME FUN IN FORECASTING SUN HI TEMPS/WINDS. .FSD...NONE BR
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
820 PM CDT SAT APR 21 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0739 PM 6 N EMERSON NE 1.75 INCH HAIL
04/20/01 DIXON
0741 PM 6 N EMERSON NE 1 INCH HAIL
04/20/01 DAKOTA REPORTED BY PUBLIC.
0756 PM 5 NW NEWCASTLE NE .88 INCH HAIL
04/20/01 DIXON
0830 PM 5 NW NEWCASTLE NE 1.25 INCH HAIL
04/20/01 DIXON REPORTED BY PUBLIC.
0845 PM 2 SW SPINK SD 1.75 INCH HAIL
04/20/01 UNION REPORTED BY PUBLIC.
0905 PM 5 NW NEWCASTLE NE .88 INCH HAIL
04/20/01 DIXON REPORTED BY PUBLIC.
0925 PM 2 SW SPINK SD .75 INCH HAIL
04/20/01 UNION REPORTED BY PUBLIC.
0935 PM 2 E BOYDEN IA .75 INCH HAIL
04/20/01 SIOUX REPORTED BY STORM
SPOTTER.
0947 PM 9 S LITTLE ROCK IA .75 INCH HAIL
04/20/01 LYON REPORTED BY PUBLIC.
1005 PM 3 N NEWELL IA 1 INCH HAIL
04/20/01 BUENA VISTA REPORTED BY PUBLIC.IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-220930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 928 PM CDT SAT APR 21 2001 ...STRONG STORM SYSTEM TO AFFECT THE REGION SUNDAY INTO MONDAY MORNING STILL ON TRACK... LOW PRESSURE WILL CONTINUE TO DEVELOP TONIGHT OVER COLORADO... AND WILL INTENSIFY...AND MOVE NORTHEAST INTO NORTHWEST IOWA BY LATE SUNDAY NIGHT. AS IT MOVES NORTHEAST...THE LOW WILL PULL A WARM FRONT UP INTO NORTHERN IOWA BY SUNDAY NIGHT. RAIN WILL BEGIN TO DEVELOP TONIGHT ACROSS THE CENTRAL PLAINS AND SPREAD NORTH INTO THE AREA LATE TONIGHT AND SUNDAY MORNING. THE RAIN WILL BECOME WIDESPREAD ON SUNDAY...WITH THUNDERSTORMS EXPECTED TO DEVELOP OVER NORTHWEST IOWA...FAR SOUTHEAST SOUTH DAKOTA... NORTHEAST NEBRASKA AND SOUTHERN MINNESOTA LATE SUNDAY AFTERNOON OR EVENING. SOME OF THE STORMS COULD BECOME SEVERE ACROSS PORTIONS OF NORTHWEST IOWA AND NORTHEAST NEBRASKA...WITH THE GREATEST THREAT OF SEVERE WEATHER...SOUTHEAST OF A SIOUX CITY TO WORTHINGTON MINNESOTA LINE. IN ADDITION TO THE THUNDERSTORMS...RAIN WILL CHANGE OVER TO SNOW LATE SUNDAY AFTERNOON OR SUNDAY NIGHT ALONG AND WEST OF A LINE FROM HURON...THROUGH MITCHELL...TO YANKTON. AT THIS TIME... IT IS STILL UNCERTAIN HOW MUCH SNOW WILL FALL...AS IT WILL DEPEND GREATLY ON HOW QUICKLY THE RAIN CHANGES OVER TO SNOW. HOWEVER THERE IS SOME INDICATION THAT HEAVY SNOW COULD BE A POSSIBILITY...AND A WINTER WEATHER WATCH COULD BE ISSUED BY EARLY SUNDAY MORNING. FINALLY...RAINFALL AMOUNTS WILL BE LOCALLY HEAVY SUNDAY AFTERNOON AND NIGHT...AND THIS COULD CAUSE ADDITIONAL FLOODING PROBLEMS ALONG RIVERS AND STREAMS. PERSONS ACROSS THE AREA SHOULD KEEP UP TO DATE WITH THE LATEST FORECAST BY LISTENING TO NOAA WEATHER RADIO...OR OTHER FAVORITE WEATHER SOURCES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1116 PM CDT SAT APR 21 2001
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0730 PM 6 W EMERSON NE 1.75 INCH HAIL
04/20/01 DIXON REPORTED BY PUBLIC.
1000 PM 2 W SIBLEY IA .75 INCH HAIL
04/20/01 OSCEOLA REPORTED BY STORM
SPOTTER.
1005 PM NEWELL IA 1.25 INCH HAIL
04/20/01 BUENA VISTAThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Flooding along the Rock River affected farmland and other lowlands, as well as parkland and baseball fields in Luverne. No damage estimates were available.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2001Every state in 2001This day in weather historyWarnings in Minnesota, 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: 5242858.