Thunderstorms produced damaging winds, two tornadoes, large hail and flash flooding over southwest Minnesota during the afternoon and very early evening of July 1st.
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 episode as NWS FSD wrote it up.
Thunderstorms produced damaging winds, two tornadoes, large hail and flash flooding over southwest Minnesota during the afternoon and very early evening of July 1st.
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 Jul 1, 2:35 PM CST, 10 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 PM CDT FRI JUL 1 2011 .DISCUSSION... EXPECT CONVECTIVE DEVELOPMENT TO CONTINUE INTO THE EARLY EVENING HOURS...AS A PV ANOMALY SHIFTS ACROSS THE AREA AND INTERACTS WITH LOW LEVEL CONVERGENCE ALONG THE COLD FRONT. EXPECT THE BULK OF THE SEVERE WEATHER THREAT TO BE BETWEEN NOW AND AROUND 01Z...WHEN MID LEVEL ASCENT AND INSTABILITY ARE MAXIMIZED. HIGH PRESSURE WILL BUILD IN ON SATURDAY...AND BRING A MILD START TO THE WEEKEND. HOWEVER...THE RESPITE FROM BENIGN WEATHER WILL BE SHORT LIVED...AS THE NEXT PESKY SHORTWAVE IN THE QUASI ZONAL FLOW REGIME ARRIVES ON SATURDAY NIGHT. AT THIS POINT...AREAS ALONG/SOUTH OF INTERSTATE 90 WILL BE MORE SUSCEPTIBLE TO SHOWER AND THUNDERSTORM ACTIVITY ON SATURDAY NIGHT AND EARLY SUNDAY. HIGH TEMPERATURES REMAIN SEASONAL ON SUNDAY...WITH HIGHS IN THE LOW TO MID 80S. A LLVL BOUNDARY BECOMES ESTABLISHED NEAR THE FORECAST AREA ON SUNDAY ON THE PERIPHERY OF THE UPPER RIDGE. COULD SEE AN ISOLATED STORM OR TWO ON SUNDAY ON THE EDGE OF THE MID LEVEL CAP. A SLIGHTLY BETTER CHANCE OF RAIN WILL ARRIVE FROM MONDAY NIGHT THROUGH THURSDAY NIGHT AS A MORE WELL DEFINED BOUNDARY ARRIVES. TEMPERATURES APPEAR TO REMAIN RELATIVELY NEAR TO SEASONAL NORMALS THROUGH THE END OF NEXT WEEK. && .AVIATION... THE BULK OF THE STRONGER THUNDERSTORMS SHOULD STAY TO THE NORTH/EAST OF THE TAF SITES THROUGH THE REMAINDER OF THE AFTERNOON AND EVENING. HOWEVER...WIND SHIFTS WITH THUNDERSTORM OUTFLOW AND ISOLATED THUNDERSTORMS WILL STILL BE POSSIBLE UNTIL EARLY EVENING. CONDITIONS SHOULD REMAIN MOSTLY VFR. AFTER THE CONVECTIVE ACTIVITY WANES...SKIES ARE EXPECTED TO BECOME MOSTLY CLEAR TONIGHT AS NORTHWEST WINDS DIMINISH TO AROUND 5 KTS. && .FSD WATCHES/WARNINGS/ADVISORIES... IA...NONE. MN...NONE. NE...NONE. SD...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1042 AM CDT FRI JUL 01 2011 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-021200- 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- 1042 AM CDT FRI JUL 01 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED SEVERE THUNDERSTORMS WILL BECOME POSSIBLE THROUGHOUT THE DAY. A BROKEN LINE OF THUNDERSTORMS WILL PRODUCE ISOLATED SEVERE THUNDERSTORMS IN CENTRAL SOUTH DAKOTA THROUGH EARLY AFTERNOON WITH THE MAIN THREATS WIND GUSTS TO 60 MPH AND HAIL TO THE SIZE OF QUARTERS. BY MID AFTERNOON STRONGER THUNDERSTORMS WILL BE POSSIBLE EAST OF THE JAMES RIVER VALLEY WHERE HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 70 MPH WILL BE POSSIBLE. THE MAIN THREAT SHOULD OCCUR BEFORE 800 PM CDT. FLOODING... THE JAMES RIVER WILL BE IN FLOOD UNTIL FURTHER NOTICE. ELSEWHERE...PARTS OF THE BIG SIOUX...LITTLE SIOUX...AND DES MOINES RIVERS REMAIN IN FLOOD. BUT MANY PORTIONS OF THESE RIVERS WILL FALL BELOW FLOOD STAGE THIS WEEKEND AND NEXT WEEK IF NO HEAVY RAIN IS RECEIVED. RECORD HIGH RELEASES ALONG THE MISSOURI RIVER WILL CONTINUE INTO MID SUMMER. HIGH WATER LEVELS WILL CAUSE SIGNIFICANT IMPACTS BETWEEN CHAMBERLAIN AND SIOUX CITY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE AREA SATURDAY NIGHT AND SUNDAY MORNING BUT THESE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE AFTER 100 PM CDT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
248 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM HAIL CANISTOTA 43.60N 97.29W
07/01/2011 M1.75 INCH MCCOOK SD TRAINED SPOTTER
&&
TRMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
301 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0257 PM HAIL MONTROSE 43.70N 97.18W
07/01/2011 M1.75 INCH MCCOOK SD EMERGENCY MNGR
&&
TRMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
306 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM TSTM WND GST 1 NE MADISON 44.02N 97.09W
07/01/2011 M58 MPH LAKE SD AWOS
&&
TRMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
308 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 PM HAIL 5 ESE CANOVA 43.85N 97.41W
07/01/2011 E2.50 INCH MINER SD PUBLIC
&&
TRMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
322 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0315 PM TSTM WND GST 3 ESE NUNDA 44.14N 96.96W
07/01/2011 E60.00 MPH LAKE SD TRAINED SPOTTER
&&
BTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
331 PM CDT FRI JUL 01 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM TSTM WND GST 9 N COLMAN 44.12N 96.83W
07/01/2011 E70 MPH MOODY SD TRAINED SPOTTER
WIND GUSTS ESTIMATED AT 60 TO 70 MPH, WITH SOME HAIL AND
VERY HEAVY RAIN.
&&
TRMThe Sioux Falls radar (KFSD), 78 km away, was scanning. The volume nearest the first event began at 20:44 UTC.
11 thunderstorm wind, 6 hail, 2 tornado, 1 flash flood. Local standard time, as filed.
Thunderstorm winds damaged a silo and a barn. The winds also caused tree damage, including several trees snapped off.
Thunderstorm winds blew down numerous power lines along U.S. Highway 14, and caused tree damage.
Thunderstorm winds blew down weather observation equipment and caused tree damage, including up to 8 inch diameter branches blown down.
A tornado destroyed a shelter belt, damaged a Morton building, and damaged several garages, one of which was moved off its foundation. The tornado also caused widespread tree damage, including several trees snapped off at the base.
Thunderstorm winds caused tree damage, including branches around 4 inches in diameter blown down. The winds were accompanied by nickel size hail.
Nickel size hail was accompanied by damaging thunderstorm winds.
Non tornadic thunderstorm winds blew down trees, power poles, and power lines, destroyed a highway shop, and blew the roof off a pallet business.
A tornado destroyed several outbuildings and storage buildings, took the roofs off several other structures, and otherwise damaged the siding and roofs of several structures including some homes. Widespread tree damage included several trees blown down and debarking at tree tops.
Thunderstorm winds blew down trees and power lines, and blew over a truck.
Thunderstorm winds destroyed a grain bin, ripped a door off the side of a house, blew over a truck, and caused widespread tree damage, including several trees blown down.
Large hail was accompanied by damaging thunderstorm wind gusts.
Thunderstorm winds caused tree damage, including a few trees uprooted. The winds were accompanied by quarter size hail.
Thunderstorm winds caused widespread tree damage, including trees greater than 2 1/2 feet in diameter blown down in Garvin Park. The winds also destroyed a barn.
Thunderstorm winds damaged several homes and at least one barn, including parts of roofs torn off and shingles blown away. The winds also caused widespread tree damage, including trees up to 2 1/2 feet in diameter snapped off. Additional damage was done to roofs and siding of homes and other structures by falling trees and tree debris. Several grain bins were destroyed. The winds blew down power poles and lines, causing a power outage.
Thunderstorm winds caused widespread tree damage, including numerous trees blown down. Several roads were blocked by fallen trees. Roofs and siding of several homes were damaged directly by the wind, and also by falling trees and wind blown tree debris. The winds also blew down power poles and lines, causing a power outage. The winds were accompanied by large hail.
Large hail, driven by damaging winds, broke windows, dented vehicles, and caused an unknown amount of crop damage.
Heavy rain caused flash flooding of several streets in Marshall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2011Every state in 2011This day in weather historyThe tornado archive for Minnesota, 2011Warnings in Minnesota, July 2011
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: 332994, 332996, 332999, 333002, 333003, 333004, 333005, 333006, 333007, 333620, 333621, 333623, 333624, 333626, 333627, 333628, 333629, 333688, 333690, 333691.