Heavy rainfall across northern Iowa and southern Minnesota sent a wave of flood water south along the Des Moines River The upper reaches flooded earlier in the month with the water reaching farther south after mid month. In addition, another round of heavy rain fell over the central sections of the state.
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 DMX wrote it up.
Heavy rainfall across northern Iowa and southern Minnesota sent a wave of flood water south along the Des Moines River The upper reaches flooded earlier in the month with the water reaching farther south after mid month. In addition, another round of heavy rain fell over the central sections of the state. This caused river rises and pushed the Raccoon River and the North River out of its banks. This flood event was all relatively minor.
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 Des Moines, IA wrote its last area forecast discussion before the first event at Jun 20, 6:30 AM CST, 21 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 730 AM CDT MON JUN 20 2011 ...UPDATED FOR 12Z AVIATION DISCUSSION... .DISCUSSION... BUSY MORNING WITH STRONG WAA AND THETA-E ADVECTION INTO THE STATE WITH +60KTS LLJ FOCUSED INTO THE STATE. WIDESPREAD CONVECTION HAS BEEN ONGOING AND WILL CONTINUE INTO THE MORNING AS THUNDERSTORMS ADVECT IN FROM NEBRASKA. HAVE EXPANDED THE FLASH FLOOD WATCH ANOTHER ROW OF COUNTIES TO THE NORTH AS THE LINE FOCUSES IN ON THE I80 CORRIDOR. SEVERE WEATHER WITH LARGE HAIL AND DAMAGING WINDS WILL ALSO REMAIN THROUGH THE MORNING WITH THESE STORMS. SOME BREAK FORESEEN BY MIDDAY INTO THE AFTERNOON ACRS MUCH OF THE AREA AS EML MOVES ACRS MUCH OF THE STATE. HOWEVER...AS UPPER LOW APPROACHES LATE IN THE DAY...CAP SHOULD ERODE WITH THUNDERSTORMS OVERSPREADING THE STATE FROM WEST TO EAST THIS EVENING. SUBSTANTIAL SHEAR AND INSTABILITY WILL MAKE ALL MODES OF SEVERE WEATHER POSSIBLE THIS EVENING INCLUDING SOME TORNADOES...ESPECIALLY IN WESTERN IA. SYSTEM LIKELY TO EVOLVE INTO A LINEAR FORMATION WITH WIND AND HAIL BECOMING MORE LIKELY INTO THE OVERNIGHT. SYSTEM THEN GRADUALLY CUTSOFF WITH UPPER LOW LINGERING ACRS THE UPPER MIDWEST THROUGH THURSDAY. WILL STILL SEE THE THREAT FOR SOME SEVERE CONVECTION INTO TUESDAY AS SFC LOW STAYS JUST WEST OF THE AREA. THE LINGERING THREAT OF PRECIPITATION WILL REMAIN INTO WEDNESDAY AND EVEN THURSDAY...BUT WITH LESS INSTABILITY AND THUNDERSTORMS BECOMING MORE ISOLATED. NO CHANGES BEYOND THIS POINT DUE TO THE ONGOING ACTIVITY. && .AVIATION...20/12Z WARM FRONT WILL CONTINUE TO LIFT TOWARD THE STATE TODAY WITH CONVECTION GRADUALLY DIMINISHING THIS MORNING. WILL SEE MVFR TO IFR CONDITIONS IN AND AROUND THUNDERSTORMS OTHERWISE EXPECT VFR CONDITIONS TO PREVAIL BY MIDDAY ACRS CENTRAL IOWA. THUNDERSTORMS ARE FORECAST TO REDEVELOP IN EASTERN NEBRASKA THIS EVENING AND MOVE ACRS CENTRAL IOWA TONIGHT WITH MVFR TO IFR CONDITIONS ONCE AGAIN DEVELOPING NEAR THUNDERSTORMS. SFC WINDS WILL BE ESE THROUGH THE DAY AND INTO TONIGHT. && .DMX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH UNTIL 1 PM CDT THIS AFTERNOON FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-CASS-CLARKE-DALLAS-DAVIS-DECATUR- GUTHRIE-JASPER-LUCAS-MADISON-MAHASKA-MARION-MONROE-POLK-POWESHIEK- RINGGOLD-TAYLOR-UNION-WAPELLO-WARREN-WAYNE. && DISCUSSION..COGIL AVIATION...COGIL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 741 AM CDT MON JUN 20 2011 IAZ057>059-070>072-081-082-092-093-211245- AUDUBON-GUTHRIE-DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR- RINGGOLD- 741 AM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS MORNING WITH HAIL UP TO ONE INCH IN DIAMETER ALONG WITH WIND GUSTS TO 60 MPH. VERY HEAVY RAINFALL WILL ALSO BE POSSIBLE. HOWEVER...MORE INTENSE THUNDERSTORMS ARE EXPECTED THIS EVENING WHEN A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS. GOLF BALL HAIL OR LARGER...DAMAGING WIND GUSTS TO 75 MPH AND A FEW TORNADOES WILL BE POSSIBLE DURING THE EVENING. LOCALIZED HEAVY RAINFALL WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS ARE EXPECTED INTO TUESDAY AND WEDNESDAY AS WELL AS LATE FRIDAY INTO NEXT WEEKEND. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY FROM LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO OR TWO. THE SEVERE WEATHER THREAT ON WEDNESDAY AND THIS WEEKEND APPEARS LOW. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL IS NOW SCHEDULED FOR 1 PM CDT TODAY TO BRIEF THE SEVERE WEATHER POTENTIAL THIS EVENING AND OVERNIGHT TONIGHT. SPOTTER ACTIVATION MAY BE NEEDED THIS MORNING AND IS EXPECTED TO OCCUR THIS EVENING. ADDITIONAL ACTIVATION MAY BE NEEDED AT VARIOUS TIMES THIS WEEK. IAZ033-034-044>046-211245- SAC-CALHOUN-CRAWFORD-CARROLL-GREENE- 741 AM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS MORNING WITH HAIL UP TO ONE INCH IN DIAMETER ALONG WITH WIND GUSTS TO 60 MPH. HOWEVER...MORE INTENSE THUNDERSTORMS ARE EXPECTED THIS EVENING WHEN A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS. GOLF BALL HAIL OR LARGER...DAMAGING WIND GUSTS TO 75 MPH AND A FEW TORNADOES WILL BE POSSIBLE DURING THE EVENING. LOCALIZED HEAVY RAINFALL WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS ARE EXPECTED INTO TUESDAY AND WEDNESDAY AS WELL AS LATE FRIDAY INTO NEXT WEEKEND. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY FROM LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO OR TWO. THE SEVERE WEATHER THREAT ON WEDNESDAY AND THIS WEEKEND APPEARS LOW. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL IS NOW SCHEDULED FOR 1 PM CDT TODAY TO BRIEF THE SEVERE WEATHER POTENTIAL THIS EVENING AND OVERNIGHT TONIGHT. SPOTTER ACTIVATION MAY BE NEEDED THIS MORNING AND IS EXPECTED THIS EVENING. ADDITIONAL ACTIVATION MAY BE NEEDED AT VARIOUS TIMES THIS WEEK. IAZ035>039-047>050-211245- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-BOONE-STORY-MARSHALL-TAMA- 741 AM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS MORNING WITH HAIL UP TO ONE INCH IN DIAMETER ALONG WITH WIND GUSTS TO 60 MPH. HOWEVER...MORE INTENSE THUNDERSTORMS ARE EXPECTED THIS EVENING INTO TONIGHT WHEN A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS. GOLF BALL HAIL AND DAMAGING WIND GUSTS TO 70 MPH WILL BE POSSIBLE. LOCALIZED HEAVY RAINFALL WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS ARE EXPECTED INTO TUESDAY AND WEDNESDAY AS WELL AS LATE FRIDAY INTO NEXT WEEKEND. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY FROM LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO OR TWO. THE SEVERE WEATHER THREAT ON WEDNESDAY AND THIS WEEKEND APPEARS LOW. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL IS NOW SCHEDULED FOR 1 PM CDT TODAY TO BRIEF THE SEVERE WEATHER POTENTIAL THIS EVENING AND OVERNIGHT TONIGHT. SPOTTER ACTIVATION MAY STILL BE NEEDED THIS MORNING AND IS EXPECTED THIS EVENING. ADDITIONAL ACTIVATION MAY BE NEEDED AT VARIOUS TIMES THIS WEEK. IAZ004>007-015>017-023>028-211245- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER- 741 AM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE EXPECTED THIS MORNING WITH AN ISOLATED SEVERE STORM POSSIBLE...MAINLY FROM HAIL APPROACHING ONE INCH IN DIAMETER. HOWEVER...MORE INTENSE THUNDERSTORMS ARE EXPECTED THIS EVENING INTO TONIGHT WHEN A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS. GOLF BALL HAIL AND DAMAGING WIND GUSTS TO 70 MPH WILL BE POSSIBLE. LOCALIZED HEAVY RAINFALL WILL ALSO BE POSSIBLE. RIVER FLOOD WARNINGS ARE IN EFFECT FOR PORTIONS OF THE UPPER DES MOINES RIVER BASIN. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS ARE EXPECTED INTO TUESDAY AND WEDNESDAY AS WELL AS LATE FRIDAY INTO NEXT WEEKEND. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY FROM LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO OR TWO. THE SEVERE WEATHER THREAT ON WEDNESDAY AND THIS WEEKEND APPEARS LOW. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL IS NOW SCHEDULED FOR 1 PM CDT TODAY TO BRIEF THE SEVERE WEATHER POTENTIAL THIS EVENING AND OVERNIGHT TONIGHT. SPOTTER ACTIVATION IS EXPECTED THIS EVENING INTO TONIGHT. ADDITIONAL ACTIVATION MAY BE NEEDED AT VARIOUS TIMES THIS WEEK. IAZ060>062-073>075-083>086-094>097-211245- POLK-JASPER-POWESHIEK-WARREN-MARION-MAHASKA-CLARKE-LUCAS-MONROE- WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS- 741 AM CDT MON JUN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS MORNING WITH HAIL UP TO ONE INCH IN DIAMETER ALONG WITH WIND GUSTS TO 60 MPH. VERY HEAVY RAINFALL WILL ALSO BE POSSIBLE. HOWEVER...MORE INTENSE THUNDERSTORMS ARE EXPECTED THIS EVENING INTO TONIGHT WHEN A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS. GOLF BALL HAIL AND DAMAGING WIND GUSTS TO 70 WILL BE POSSIBLE. LOCALIZED HEAVY RAINFALL WILL ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ADDITIONAL THUNDERSTORMS ARE EXPECTED INTO TUESDAY AND WEDNESDAY AS WELL AS LATE FRIDAY INTO NEXT WEEKEND. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ON TUESDAY FROM LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO OR TWO. THE SEVERE WEATHER THREAT ON WEDNESDAY AND THIS WEEKEND APPEARS LOW. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL IS NOW SCHEDULED FOR 1 PM CDT TODAY TO BRIEF THE SEVERE WEATHER POTENTIAL THIS EVENING AND OVERNIGHT TONIGHT. SPOTTER ACTIVATION MAY STILL BE NEEDED THIS MORNING AND IS EXPECTED TO OCCUR THIS EVENING AND TONIGHT. ADDITIONAL ACTIVATION MAY BE NEEDED AT VARIOUS TIMES THIS WEEK. REV
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 501 AM CDT MON JUN 20 2011 IAZ060-061-073-074-201030- JASPER-MARION-POLK-WARREN- 501 AM CDT MON JUN 20 2011 ...GUSTY WINDS POSSIBLE... AT 501 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER EAST CENTRAL POLK COUNTY...MOVING EAST AT 35 MPH. WINDS UP TO 50 MPH...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... RUNNELLS... SWAN... PRAIRIE CITY... COLFAX... PLEASANTVILLE... LAMBS GROVE... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. BEERENDS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 507 AM CDT MON JUN 20 2011 IAZ059-060-201030- DALLAS-POLK- 507 AM CDT MON JUN 20 2011 ...ANOTHER ROUND OF GUSTY WINDS POSSIBLE... AT 505 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 21 MILES NORTHWEST OF DES MOINES...MOVING EAST AT 55 MPH. WINDS UP TO 50 MPH...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... GRIMES... GRANGER... CLIVE... SAYLORVILLE LAKE... WINDSOR HEIGHTS... WEST DES MOINES... URBANDALE... POLK CITY... JOHNSTON... DES MOINES INT AIRPORT... ANKENY AIRPORT... SAYLORVILLE... DES MOINES... ANKENY... ALLEMAN... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. BEERENDS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 551 AM CDT MON JUN 20 2011 IAZ060-061-073-074-201115- JASPER-MARION-POLK-WARREN- 551 AM CDT MON JUN 20 2011 ...ANOTHER ROUND OF GUSTY WINDS POSSIBLE... AT 546 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8 MILES NORTH OF INDIANOLA...MOVING SOUTHEAST AT 35 MPH. WINDS UP TO 50 MPH...BRIEF MODERATE DOWNPOURS...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SWAN... SANDYVILLE... PRAIRIE CITY... MILO... PLEASANTVILLE... MELCHER-DALLAS... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. BEERENDS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 603 AM CDT MON JUN 20 2011 IAZ061-062-075-201130- JASPER-MAHASKA-POWESHIEK- 603 AM CDT MON JUN 20 2011 ...GUSTY WINDS POSSIBLE... AT 600 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER EXTREME NORTHWESTERN MAHASKA COUNTY...MOVING EAST AT 35 MPH. WINDS UP TO 50 MPH...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... SEARSBORO... NEW SHARON... MONTEZUMA... DEEP RIVER... BARNES CITY... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. BEERENDS
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
626 AM CDT MON JUN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0115 AM TSTM WND DMG ALBIA 41.03N 92.80W
06/20/2011 MONROE IA TRAINED SPOTTER
NUMEROUS SMALL BRANCHES AND LIMBS DOWN ALONG WITH A FEW
PORTIONS OF LARGER TREES. SOME OF THESE WERE BLOCKING
PORTIONS OF THE ROAD. ANOTHER TREE FELL ONTO A VEHICLE AT
THE CHINESE RESTAURANT ON EAST BENTON.
&&
SKOWSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 720 AM CDT MON JUN 20 2011 IAZ061-062-074-075-201245- JASPER-MAHASKA-MARION-POWESHIEK- 720 AM CDT MON JUN 20 2011 ...GUSTY WINDS POSSIBLE... AT 714 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 14 MILES NORTHWEST OF OSKALOOSA...MOVING EAST AT 45 MPH. WINDS GREATER THAN 40 MPH...ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... UNIVERSITY PARK... OSKALOOSA... NEW SHARON... OSKALOOSA AIRPORT... MONTEZUMA... KEOMAH VILLAGE... ROSE HILL... FREMONT... BARNES CITY... DEEP RIVER... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED. BEERENDS
The national radar mosaic for the moment the first event began.
6 flood. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2011Every state in 2011This day in weather historyWarnings in Iowa, June 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: 311390, 311380, 311381, 311379, 311378, 311377.