Part of the Des Moines River returned to its banks during the first part of the month. S.
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.
Part of the Des Moines River returned to its banks during the first part of the month. Rounds of thunderstorms continued over northwest Iowa into southwest Minnesota as an upper level ridge developed over the central U.S. Ring of Fire thunderstorms developed for several nights, especially in the 12th to 14th time period. The heavy rainfall caused rises along the Des Moines River with levels rising several inches above flood stage at Emmetsburg and Humboldt.
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 Jul 14, 5:24 PM CST, 2 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 624 PM CDT THU JUL 14 2011 ...UPDATED AVIATION DISCUSSION... .SHORT TERM /TONIGHT/... HIGH PRESSURE ALOFT WILL BUILD INTO THE WEST/SOUTHWEST TONIGHT. WATER VAPOR SHOWING SEVERAL IMPULSES RIDING ATOP THE BUILDING RIDGE WHICH WILL AGAIN IMPACT OUR WEATHER. FOR THE EVENING...I AM NOT EXPECTING MUCH. THE LOW LEVEL MOISTURE HAS PUSHED DECREASED SOME AND CLOUDS HAVE GONE CELLULAR BASED ON SATELLITE IMAGERY. WITH THE ONSET OF SUNSET...I AM EXPECTING CLOUDS TO RETURN AS WARM ADVECTION AND RICHER LOW LEVEL MOISTURE BEGINS TO RETURN. TIMING OF THE WEAKER SHORT WAVES WILL BE DIFFICULT BUT THESE SHOULD PRIMARILY AFFECT THE WEST AND NORTH. THE GFS IS A BIT MORE BULLISH ON THE MOISTURE AND I AM TRENDING MORE TOWARDS THAT SOLUTION. HAVING SAID THAT THERE WILL ONCE AGAIN BE THE POTENTIAL FOR HEAVY RAINFALL WITH THE SHOWERS AND STORMS AS THE AIRMASS WILL BECOME QUITE TROPICAL. I DID MENTION HEAVY RAIN IN THE ZONES ACROSS THE FAR NORTH AND DEPENDING ON HOW DEEP THE RIDGE WILL BUILD...WE MAY EITHER BE OUT OF THE HEAVIEST RAINFALL OR WE MAY NEED TO DROP THAT WORDING DOWN INTO THE SECOND TIER OF COUNTIES ACROSS THE NORTH. EVENING SHIFT CAN EVALUATE CLOSER TO WHEN THE SHORTWAVES APPROACH. .LONG TERM /TONIGHT THROUGH THURSDAY/... PRIMARY FORECAST CONCERN IN THE LONG TERM WILL BE THE EXCESSIVE HEAT EVENT TAKING SHAPE ACROSS IOWA. ALL MODEL SOLUTIONS BUILD UPPER RIDGE NORTH FRIDAY AND SATURDAY WITH CENTER OF THE UPPER LEVEL HIGH OVER SOUTHWEST IOWA ON SUNDAY AT NEAR 600 DAM/S. ONCE IN PLACE...THE UPPER RIDGE REMAINS IN PLACE THROUGH TUESDAY. AFTER THAT...THERE IS AN INDICATION THAT THE CENTER OF THE RIDGE WILL MOVE SOUTHEAST INTO THE OHIO VALLEY ALLOWING HEIGHTS TO FALL SOME. 850 MB TEMPERATURES SHOULD RANGE FROM 22 TO 27C BETWEEN SUNDAY AND TUESDAY OVER CENTRAL IOWA. SOUTHERLY TO SOUTHWEST LOW-LEVEL FLOW SUPPORTS DECENT MIXING...BUT THE GFS MODEL SOUNDINGS ONLY MIX THROUGH ABOUT 900 MB WITH AN APPARENT SUBSIDENCE INVERSION ABOVE. THERMAL PROFILE DOES SUPPORT TEMPERATURES WELL INTO THE 90S. ALTHOUGH THERE SHOULD BE DRYING ALOFT DUE TO SUBSIDENCE UNDER THE RIDGE...EXPECT THE SKIN DEW POINTS TO REMAIN HIGH WELL INTO THE 70S. THE RESULT OF ALL OF THIS WILL BE A PROLONGED HEAT EPISODE ACROSS CENTRAL IOWA. FOR NOW...ISSUED A EXCESSIVE HEAT WATCH STARTING SATURDAY OR SUNDAY AND CONTINUE THROUGH TUESDAY. IT IS VERY POSSIBLE THE EPISODE WILL LAST BEYOND THAT PERIOD OF TIME...BUT THERE IS SOME UNCERTAINTY SINCE THE CENTER OF THE RIDGE DRIFTS SOUTHEAST. IT CAN BE EXTENDED DOWN THE ROAD. EXPECT WATCHES TO BECOME WARNINGS ONCE THE EVENT NEARS. EXCESSIVE HEAT WARNING CRITERIA OF APPARENT TEMPS OF 110F MAY NOT BE REALIZED THE ENTIRE TIME...BUT THE PROLONGED NATURE OF THE EVENT MAY REQUIRE A WARNING ANYWAY. THERE ARE STILL A COUPLE CHANCES OF THUNDERSTORMS IN NORTHERN IOWA BEFORE THE RIDGE BUILDS NORTH. THE BEST CHANCE APPEARS TO BE FRIDAY NIGHT INTO SATURDAY MORNING. MODELS SUGGEST A DECENT LOW-LEVEL JET WHICH SHOULD HELP MAINTAIN THUNDERSTORMS WHICH SHOULD DEVELOP OVER THE PLAINS FRIDAY EVENING AND THEN MOVE NORTHEAST INTO NORTHWEST IOWA. && .AVIATION...15/00Z MVFR CEILINGS WILL CONTINUE TO LIFT...BUT WILL REMAIN AF KFOD...AND PERIODICALLY AT KOTM AND KMCW. HOWEVER...MOISTURE AHEAD OF SHORT WAVE WILL BRING MVFR CEILINGS BACK NEAR 06Z. COULD ALSO SEE FOG DEVELOPMENT NEAR 06Z...BUT WINDS SHOULD KEEP FOG MVFR. SHORT WAVE WILL ONCE AGAIN BRING VCSH TO NORTHERN SITES...KFOD...KMCW AND KALO EARLY IN THE MORNING...BUT WILL PUSH OUT AS HIGH PRESSURE BUILDS IN WITH VFR CONDITIONS FOR REMAINDER OF PERIOD AT ALL SITES. && .DMX WATCHES/WARNINGS/ADVISORIES... EXCESSIVE HEAT WATCH FROM SATURDAY AFTERNOON THROUGH TUESDAY EVENING FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-CARROLL-CASS-CLARKE-CRAWFORD-DALLAS-DAV IS-DECATUR-GREENE-GUTHRIE-LUCAS-MADISON-MAHASKA-MARION-MONROE-POLK-RI NGGOLD-TAYLOR-UNION-WAPELLO-WARREN-WAYNE. EXCESSIVE HEAT WATCH FROM SUNDAY AFTERNOON THROUGH TUESDAY EVENING FOR BLACK HAWK-BOONE-BREMER-BUTLER-CALHOUN-CERRO GORDO- EMMET-FRANKLIN-GRUNDY-HAMILTON-HANCOCK-HARDIN-HUMBOLDT-JASPER- KOSSUTH-MARSHALL-PALO ALTO-POCAHONTAS-POWESHIEK-SAC-STORY-TAMA- WEBSTER-WINNEBAGO-WORTH-WRIGHT. && SHORT TERM...BOKSA LONG TERM...JOHNSON AVIATION...WILKINS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 425 PM CDT THU JUL 14 2011 IAZ004-015-024-152130- EMMET-PALO ALTO-HUMBOLDT- 425 PM CDT THU JUL 14 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TONIGHT RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE WEST FORK OF THE DES MOINES RIVER AS WELL AS SOUTHERN PORTIONS OF THE DES MOINES RIVER. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. ISOLATED TO SCATTERED NON SEVERE THUNDERSTORMS ARE EXPECTED ACROSS THE OUTLOOK AREA LATE TONIGHT. HEAVY RAINFALL IS ONCE AGAIN LIKELY WITH ANY SHOWER OR STORM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED THUNDERSTORMS ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER...GENERALLY NORTHWEST OF LINE FROM ALGONA TO STORM LAKE. AN EXTREMELY HOT AND HUMID AIR MASS IS FORECAST TO SETTLE INTO THE STATE BY SUNDAY AND CONTINUE INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX READINGS DURING THIS TIME PERIOD ARE ANTICIPATED TO RANGE FROM 100 TO 110 DEGREES DURING THE PEAK HEATING PERIODS AND REMAIN IN THE 80S TO LOWER 90S DURING THE OVERNIGHT HOURS. AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY EVENING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FRIDAY NIGHT INTO SATURDAY MORNING. IAZ044>046-057>060-070>075-081>085-092>097-152130- CRAWFORD-CARROLL-GREENE-AUDUBON-GUTHRIE-DALLAS-POLK-CASS-ADAIR- MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-TAYLOR- RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- 425 PM CDT THU JUL 14 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TONIGHT ISOLATED NON SEVERE THUNDERSTORMS ARE EXPECTED LATE TONIGHT WEST OF HIGHWAY 169. HEAVY RAINFALL IS POSSIBLE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED NON SEVERE THUNDERSTORMS ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY. HEAVY RAINFALL IS POSSIBLE. AN EXTREMELY HOT AND HUMID AIR MASS IS FORECAST TO SETTLE INTO THE STATE BY SUNDAY AND CONTINUE INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX READINGS DURING THIS TIME PERIOD ARE ANTICIPATED TO RANGE FROM 100 TO 110 DEGREES DURING THE PEAK HEATING PERIODS AND REMAIN IN THE 80S TO LOWER 90S DURING THE OVERNIGHT HOURS. AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH TUESDAY EVENING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. IAZ005>007-016-017-023-025>028-033>039-047>050-061-062-152130- KOSSUTH-WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-POCAHONTAS-WRIGHT- FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-WEBSTER-HAMILTON-HARDIN-GRUNDY- BLACK HAWK-BOONE-STORY-MARSHALL-TAMA-JASPER-POWESHIEK- 425 PM CDT THU JUL 14 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TONIGHT ISOLATED TO SCATTERED NON SEVERE THUNDERSTORMS ARE EXPECTED LATE TONIGHT MAINLY NORTH OF HIGHWAY 18. HEAVY RAINFALL IS POSSIBLE WITH ANY SHOWER OR STORM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED THUNDERSTORMS ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER...GENERALLY NORTH OF HIGHWAY 3 AND WEST OF HIGHWAY 69. THE MAIN THREAT WILL BE DAMAGING WINDS AND LARGE HAIL. AN EXTREMELY HOT AND HUMID AIR MASS IS FORECAST TO SETTLE INTO THE STATE BY SUNDAY AND CONTINUE INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX READINGS DURING THIS TIME PERIOD ARE ANTICIPATED TO RANGE FROM 100 TO 110 DEGREES DURING THE PEAK HEATING PERIODS AND REMAIN IN THE 80S TO LOWER 90S DURING THE OVERNIGHT HOURS. AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY EVENING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. IAZ086-152130- WAPELLO- 425 PM CDT THU JUL 14 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TONIGHT RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE WEST FORK OF THE DES MOINES RIVER AS WELL AS SOUTHERN PORTIONS OF THE DES MOINES RIVER. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED THUNDERSTORMS ARE POSSIBLE FRIDAY NIGHT INTO SATURDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER...GENERALLY NORTH OF HIGHWAY 3 AND WEST OF HIGHWAY 69. THE MAIN THREAT WILL BE DAMAGING WINDS AND LARGE HAIL. AN EXTREMELY HOT AND HUMID AIR MASS IS FORECAST TO SETTLE INTO THE STATE BY SUNDAY AND CONTINUE INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX READINGS DURING THIS TIME PERIOD ARE ANTICIPATED TO RANGE FROM 100 TO 110 DEGREES DURING THE PEAK HEATING PERIODS AND REMAIN IN THE 80S TO LOWER 90S DURING THE OVERNIGHT HOURS. AN EXCESSIVE HEAT WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH TUESDAY EVENING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FAB
The national radar mosaic for the moment the first event began.
2 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, 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: 320243, 320244.