Low pressure in western Kansas sent waves of thunderstorms into southern Minnesota, with one storm becoming severe.
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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 episode as NWS MPX wrote it up.
Low pressure in western Kansas sent waves of thunderstorms into southern Minnesota, with one storm becoming severe.
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 Twin Cities, MN wrote its last area forecast discussion before the first event at Apr 22, 3:05 AM CST, 7 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 405 AM CDT SUN APR 22 2007 .DISCUSSION... OVERNIGHT CONVECTION ON A FAIRLY SIG DECREASING TREND WITH CLOUD TOPS WARMING OVER THE LAST 2 HOURS. LOW LEVEL JET WAS FORECAST TO VEER MORE SW AND UPPER LEVEL DIV LIFTING MAINLY INTO NORTHERN MN. WILL GO WITH THIS TREND THIS MORNING AND DECREASE POPS FROM PREV FORECAST...UNTIL FORCING FROM SIG PLAINS SYSTEM APPROACHES. THIS WILL ALLOW FOR LESS CLOUDS FOR A TIME IN EASTERN AREAS..SO NEED TO RAISE TEMPS MORE INTO MID AND UPPER 70S RANGE IN A FEW AREAS. BIG INCREASE IN POPS THIS AFTERNOON AS SIG QG FORCING APPROACHES. LOOKS LIKE THERE WILL BE A DEFORMATION ZONE SETTING UP FROM SW INTO EAST CENTRAL MN THIS EVENING. HPC QPF SEEMS TO GO ALONG WITH GFS ENSEMBLE POPS AND LOOKS OK IN THIS REGARD. AS FOR SEVERE WEATHER CHANCES..BOTH GFS AND NAM SEEM TO SUGGEST A DRY SLOT ROTATING INTO IOWA AND POSSIBLY CLOSE TO SE CORNER OF MN AND SOUTHERN WISCONSIN. LOW LEVEL MOISTURE FEED STILL NOT THE GREATEST WITH DEW POINTS IN THE MUCH OF THE AREA DUE SOUTH OF US...THUS SB CAPE WILL NOT BE ALL THAT IMPRESSIVE. 0-1 KM SHEAR FORECAST IN THE 25 TO 35 KNOT RANGE OVER EASTERN IOWA AND INTO SOUTHWEST WISCONSIN BY NAM AND GFS. WITH PRIMARY SFC LOW FORECAST TO MOVE THROUGH IOWA LATER IN THE EVENING...TORNADO THREAT NOT THAT GREAT. BUT WITH STRONG FORCING AND LIMITED INSTABILITY WITH APPROACH OF COLD FRONT...A FEW SEVERE STORMS ARE POSSIBLE. NEST SYSTEM ON TUESDAY INTO WEDNESDAY..MAINLY SOUTH OF US...BUT GFS ENSEMBLE POPS OF GREATER THAN 0.05 INCH ENOUGH TO KEEP THE SMALL CHANCE IN. ECMWF LOOKS DRY THOUGH..AND THIS WAS THE CASE WITH THE HANDLING OF THE SECOND SYSTEM AFTER OUR SNOW OF A COUPLE WEEKS AGO. && .MPX WATCHES/WARNINGS/ADVISORIES... MN...NONE. WI...NONE. && JPR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 515 AM CDT SUN APR 22 2007 MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028- 231015- DOUGLAS-TODD-MORRISON-MILLE LACS-KANABEC-STEVENS-POPE-STEARNS- BENTON-SHERBURNE-ISANTI-CHISAGO-LAC QUI PARLE-SWIFT-CHIPPEWA- KANDIYOHI-MEEKER-WRIGHT-HENNEPIN-ANOKA-RAMSEY-WASHINGTON- YELLOW MEDICINE-RENVILLE-MCLEOD-SIBLEY-CARVER-SCOTT-DAKOTA- REDWOOD-BROWN-NICOLLET-LE SUEUR-RICE-GOODHUE-WATONWAN-BLUE EARTH- WASECA-STEELE-MARTIN-FARIBAULT-FREEBORN-POLK-BARRON-RUSK- ST. CROIX-PIERCE-DUNN-PEPIN-EAU CLAIRE- 515 AM CDT SUN APR 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND SOUTH CENTRAL MINNESOTA...AND WEST CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON OVER PARTS OF CENTRAL MINNESOTA...AND ALSO APPROACH SOUTHWEST MINNESOTA. EXPECT THUNDERSTORM ACTIVITY TO BECOME MORE WIDESPREAD DURING THE LATE AFTERNOON AND EVENING...AS A COOL FRONT PUSHES SOUTHEAST ACROSS THE REGION. THE GREATEST THREAT OF SEVERE THUNDERSTORMS WILL BE SOUTHEAST OF A LINE FROM AROUND THE TWIN CITIES AND ST CLOUD...TO REDWOOD FALLS. THIS WOULD INCLUDE SOUTH CENTRAL AND EAST CENTRAL MINNESOTA AND ALL OF WEST CENTRAL WISCONSIN. THE MAIN THREAT WILL BE HAIL...DAMAGING WINDS AND HEAVY RAIN. THE TORNADO THREAT IS SLIM...BUT THE MOST VULNERABLE AREA FOR AN ISOLATED TORNADO WOULD BE OVER WEST CENTRAL WISCONSIN OR SOUTH CENTRAL MINNESOTA...SOUTH OF LINE FROM EAU CLAIRE...TO BLUE EARTH. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON OR EVENING. JPR
The Minneapolis radar (KMPX), 152 km away, was scanning. The volume nearest the first event began at 16:58 UTC.
1 thunderstorm wind. Local standard time, as filed.
Six to eight metal panels blown off industrial building. Panels approximately 8 to 10 feet long and 3 feet wide.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2007Every state in 2007This day in weather historyWarnings in Minnesota, April 2007
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: 37161.