A cold front moved through the area during the evening of April 10 sparking a line of thunderstorms. One of the stronger storms produced a 66 mph wind gust in Mount Pleasant, IA around 815 pm CDT.
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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 DVN wrote it up.
A cold front moved through the area during the evening of April 10 sparking a line of thunderstorms. One of the stronger storms produced a 66 mph wind gust in Mount Pleasant, IA around 815 pm CDT.
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 Quad Cities, IA wrote its last area forecast discussion before the first event at Apr 10, 2:30 PM CST, 4 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 330 PM CDT SUN APR 10 2011 .SYNOPSIS... A DEEP UPPER TROF EXTENDED FROM THE NORTHERN PLAINS INTO THE SOUTHWEST U.S. AT THE SURFACE THE COLD FRONT EXTENDED FROM A LOW NEAR KMSP THROUGH CENTRAL IOWA. TEMPERATURES AHEAD OF THE FRONT WERE PREDOMINANTLY IN THE 80S WITH LOW TO MID 60 DEWPOINTS. SO FAR TODAY THE AREA HAS REMAINED DRY WITH ONLY SOME ELEVATED SHRA OVER THE NORTHERN CWFA AT TIMES. VISIBLE SATELLITE IMAGERY WAS SHOWING A NARROW BAND OF CU ALONG THE FRONT IN NORTH CENTRAL IA AND A MORE WIDESPREAD CU FIELD ALONG THE MISSISSIPPI RIVER FROM SOUTHWEST WI THROUGH NORTHEAST MO. && .SHORT TERM...TONIGHT AND MONDAY... FOCUS IS ON THE CONVECTIVE DEVELOPMENT WHICH IS EXPECTED TO OCCUR IN THE 21Z-00Z TIME FRAME. LAPS SURFACE BASED CAPES OVER EASTERN AND CENTRAL IA ARE IN THE 2000-3000J/KG RANGE WITH THE CIN WEAKENING OVER CENTRAL IA. THE NARROW BAND OF CU ALONG THE FRONT IN NORTH CENTRAL IA SHOWS SOME PROMISE FOR DEVELOPMENT AND THE 16Z HRRR IS DEVELOPING CONVECTION IN THIS SAME AREA BETWEEN 22Z AND 23Z. DEEP LAYER SHEAR IS STILL EXPECTED TO BE QUITE STRONG WITH THE 18Z RUC SHOWING 0-6KM BULK SHEAR OF 60-70 KTS OVER THE CWFA AT 00Z. LAPS SURFACE HELICITIES OVER THE CWFA ARE MAXIMIZED ACROSS THE NORTH...OVER 200...WHILE THE RUC SHOWS THESE VALUES DECREASING BY 00Z. IT STILL LOOKS GOOD FOR AT LEAST ISOLATED TO SCATTERED TSRA DEVELOPMENT LATE THIS AFTERNOON WITH A SCATTERED TO BROKEN LINE OF TSRA EVOLVING NEAR THE MISSISSIPPI AND MOVING THROUGH NORTHWEST ILLINOIS BY LATE EVENING. DUE TO THE LIMITED COVERAGE HAVE KEPT POPS AROUND 50 PERCENT IN THE NORTH AND HELD POPS IN THE 30-40 RANGE OVER THE REST OF THE AREA. THE MAIN SEVERE THREAT STILL APPEARS TO BE LARGE HAIL AND DAMAGING WINDS. THE TORNADO THREAT SHOULD BE THE GREATEST OVER THE NORTHERN THIRD OF THE CWFA AND PROBABLY DURING THE INITIAL DEVELOPMENT WHEN LOW LEVEL HELICITIES ARE MAXIMIZED. OTHERWISE THE COLD FRONT SHOULD SWEEP THROUGH THE AREA DURING THE EVENING AND WILL BE EAST OF THE CWFA SHORTLY AFTER MIDNIGHT. GUSTY NORTHWEST WINDS WILL SPREAD OVER THE AREA LATE TONIGHT AND CONTINUE INTO MONDAY. POST FRONTAL LOW CLOUDS WILL ALSO MOVE OVER THE AREA DURING THE OVERNIGHT HOURS WITH THE POTENTIAL OF THE SCATTERED SHRA IN THE CYCLONIC FLOW...ESPECIALLY DURING THE MORNING. MODEL RH PROGS SUGGEST THAT DEEPER MIXING IN THE AFTERNOON WILL DISSIPATE MUCH OF THE LOWER CLOUDS BY AFTERNOON ESPECIALLY WEST OF THE MISSISSIPPI RIVER. LOWS TONIGHT ARE EXPECTED TO DROP INTO THE MID 40S TO LOW 50S. MIXING DEPTHS OVER 850MB MONDAY SUGGEST UPPER 50S TO LOW 60S FOR HIGHS MONDAY AFTERNOON. THE WIND ADVISORY FOR THIS AFTERNOON/EARLY THIS EVENING WILL BE CANCELLED. FOR THE MOST PART WINDS HAVE REMAINED BELOW ADVISORY CRITERIA. THERE IS A NARROW BAND OF STRONG WIND GUSTS JUST AHEAD OF THE FRONT IN CENTRAL IOWA. IF THE WINDS MAINTIAN THEIR STRENGTH THE COULD BRIEFLY EXCEED ADVISORY CRITERIA. HOWEVER BY THE TIME THE FRONT ARRIVES IT WILL BE AFTER MAX HEATING WHICH MAY LOWER THE WIND SPEEDS JUST BELOW ADVISORY CRITERIA. ..DLF.. .LONG TERM...MONDAY NIGHT THROUGH NEXT SUNDAY... MONDAY NIGHT THROUGH WEDNESDAY...THIS PERIOD STILL SHOULD BE CHARACTERIZED AS A NULL WX WINDOW AS BOTH SFC AND UPPER RIDGING OCCUPY MUCH OF THE MIDWEST. CLOUDS CLEARING MON NIGHT ALONG WITH A LIGHTER NORTHWEST SFC WIND REGIME WILL SET THE STAGE FOR A SEASONABLY COOL ONE WITH LOWS IN THE MID TO UPPER 30S IN MUCH OF THE CWA. TUE WILL BE MAINLY SUNNY WITH HIGHS RECOVERING BACK INTO THE 60S. FLATTENING MEAN UPPER FLOW TO TREND TO ALMOST A SPLIT REGIME... WITH SOME PHASING ISSUES UPSTREAM ACRS THE PLAINS. THIS WILL MEAN WARMING RETURN FLOW FOR WED ALONG WITH SOME INSOLATION ASSISTANCE... PRODUCING WIDESPREAD HIGHS IN THE UPPER 60S TO LOWER 70S. WEDNESDAY NIGHT THROUGH FRIDAY...LIKE MENTIONED ABOVE...SOME PHASING ISSUES OVER THE MID CONUS BETWEEN THE NORTHERN STREAM AND A WAVE EJECTING OUT OF THE SOUTHWESTERN CONUS IN THE SOUTHERN STREAM THIS PERIOD. WITH THE NEW SUITE OF 12Z MEDIUM RANGE MODEL RUNS...STILL QUITE A BIT VARIANCE IN THE SOLUTIONS AND THE MODELS SEEM TO BE HAVING TROUBLE HANDLING THIS PROCESS. WILL SIDE WITH THE SOMEWHAT MORE CONSISTENT ECMWF IN THE LONG RANGE BUT EVEN THIS MODEL HAS HAD SOME ISSUES. THE GENERAL IDEA IS FOR INITIAL SFC DEVELOPMENT AHEAD OF THE UPPER WAVE IN THE FORM OF A INVERTED SFC TROF WHICH MAY SAG CLOSE ENOUGH TO THE DVN CWA FOR IT TO FOCUS SOME LOW TO MID LEVEL MOISTURE CONVERGENCE AND RESULTANT PRECIP INTO THE AREA LATE WED NIGHT INTO THU MORNING. THIS PROCESS WILL BE BATTLING INITIALLY DRY EAST-SOUTHEAST LLVL FETCH WHICH MAY DELAY INITIAL PRECIP ONSET TO MORE DURING THE DAY ON THU...BUT WILL STILL HAVE SOME LOW POPS FOR LATE WED NIGHT IN THE WEST. THIS INITIAL INVERTED SFC TROF MAY SAG SOUTHEASTWARD AND WASH OUT...WHILE THE MAIN UPPER TROF OVER THE PLAINS PINCHES OFF INTO A CLOSED LOW OVER THE EAST CENTRAL PLAINS BY FRI MORNING. A DEEPENING SFC REFLECTION LOW MAY REALLY START TO TAKE SHAPE SOMEWHERE IN THE VCNTY OF THE IA/MO BORDER REGION THU NIGHT... WITH AN ASSOCIATED MAINLY ELEVATED RAIN SHIELD SPREADING ACRS THE DVN CWA THU NIGHT INTO FRI MORNING. DEPENDING ON MOISTURE DRAW...THE SYNOPTIC SCALE FORCING INDICATED BY THE ECMWF SUGGESTS WIDESPREAD HALF INCH TO AN INCH OF RAINFALL POSSIBLE IN THE LOCAL FCST AREA FROM THU NIGHT INTO FRI MORNING. SOME ELEVATED THUNDERSTORMS POSSIBLE IN THE SOUTH HALF OF THE FCST AREA. THE UPPER LOW WILL THEN LOOK TO SLOW-ROLL RIGHT ON TOP OF THE DVN CWA BY LATE FRI NIGHT AS THE SFC LOW OCCLUDES. THIS WOULD SPELL MORE WAVES OF RAIN LATER FRI AND FRI NIGHT...WITH SOME SIGNALS OF IN-WRAPPING COLD CONVEYOR TOP-DOWN COOLING VERTICAL PROFILES ENOUGH FOR SOME WET SNOW OR AT LEAST A MIX POSSIBLE IN THE NORTHWEST HALF OF THE DVN CWA LATER FRI NIGHT. SATURDAY AND SUNDAY...COLD CORE CLOSED UPPER LOW ROLLING ACRS THE AREA ON SAT WILL MAKE FOR MORE RAIN OR SHOWERY WEATHER...AGAIN WITH THE POTENTIAL OF SOME WET SNOW MIXING IN WITH THE RAIN. H85 MB TEMPS PROGGED TO BE FROM -3C TO -6C ON SAT BY THE NEW 12Z RUN ECMWF. HIGHS MAY NOT GET OUT OF THE LOWER 40S IN SOME OF THE NORTHERN CWA...AND BE HELD IN THE MID 40S CWA-WIDE. SEASONABLY STRONG SFC RIDGING WILL THEN LOOK TO DUMP DOWN OUT OF CANADA AND ACRS THE PLAINS AND UPPER MS RVR VALLEY FOR A CLEAR OUT SAT NIGHT. A THREAT FOR SOME LOWS IN THE 20S BY SUNDAY MORNING. A FAIR BUT UNSEASONABLY COOL SUNDAY EVEN WITH SOME INSOLATION WITH HIGHS IN THE UPPER 40S TO LOWER 50S. ..12.. && .AVIATION... THUNDERSTORM COVERAGE LATE THIS AFTERNOON IS EXPECTED TO BE SCATTERED SO KEPT MENTION STORMS TO VCTS IN ALL TAFS. AS THE STORMS DEVELOP THEN TAFS WILL BE REFINED FOR TIMING AND EXPECTED CONDITIONS FOR LOCATIONS THAT ARE IN THE STORMS PATHS. A COLD FRONT WILL MOVE THROUGH ALL TAFS SITES BY 05Z WITH GUSTY NORTHWEST WINDS DEVELOPING BEHIND THE FRONT. ALSO MVFR CIGS WILL SPREAD OVER THE AREA BEHIND THE FRONT AFTER 06Z WITH CEILINGS LIFTING TO VFR BY LATE MORNING. SCATTERED SHRA ARE ALSO EXPECTED OVER MOST OF THE AREA BETWEEN 12Z AND 18Z. ..DLF.. && .HYDROLOGY... WIDESPREAD MINOR TO MODERATE CATEGORY FLOODING CONTINUES ALONG PORTIONS OF THE MISSISSIPPI RIVER...AS RIVER LEVELS CONTINUE TO RESPOND AS A RESULT OF SNOW MELT TO THE NORTH. MUCH OF THE MISSISSIPPI RIVER IS PROJECTED TO RISE INTO THE MODERATE CATEGORY OVER THE NEXT WEEK TAKING INTO ACCOUNT THIS SNOW MELT AND SOME RAINFALL EPISODES ACROSS THE UPPER MS RIVER BASIN. NEW PROJECTIONS AND UPSTREAM FLOW ASSESSMENTS...TAKING INTO ACCOUNT SOME OF THE HEAVY RAIN EPISODES ACROSS MINNESOTA AND WISCONSIN/UPPER MISSISSIPPI RIVER BASIN LAST NIGHT AS WELL AS SOME ADDITIONAL RAIN POSSIBLE TONIGHT... WILL ADD SOME TO THE SNOW MELT RUN-OFF. TAKING INTO ACCOUNT THESE NEW UPSTREAM FLOW PROJECTIONS...MISSISSIPPI RIVER FORECAST POINTS FROM LD 16 ILLINOIS CITY NORTHWARD TO DUBUQUE MAY EXPERINCE ENHANCED RISES FROM MID WEEK ON INTO NEXT WEEKEND. THIS MAY PUSH SEVERAL OF THESE SITES NEAR OR ABOVE THE MAJOR FLOOD STAGE BY NEXT WEEKEND OR EARLY THE WEEK OF APRIL 18TH AND 19TH. HAVE ISSUED THE FLOOD STATEMENT AND LET THESE NEW FORECAST HYDROGRAPHS GO ADVERTISING THESE ENHANCED RISES...BUT HAVE HELD OFF OF ISSUING OFFICIAL NEW WARNINGS FOR THESE POINTS HITTING MAJOR FLOOD STAGE UNTIL MONDAY. THAT WAY MORE ASSESSMENT AND COORDINATION CAN BE DONE TAKING INTO ACCOUNT THESE UPSTREAM FLOW PROJECTIONS AND PRECIP INPUT...AS WELL AS ASSESS THE NEED FOR UPGRADING EVEN MORE FORECAST POINTS TO THE MAJOR FLOOD CATEGORY. WITH THE CONTINUED ELEVATED RIVER LEVELS...THE MISSISSIPPI RIVER WILL REMAIN SUSCEPTIBLE TO ADDITIONAL RISES WITH SIGNIFICANT PRECIPITATION EVENTS. EXTENDED PERIODS OF UNSETTLED WEATHER WITH RAIN AND ISOLATED STORMS THURSDAY AND FRIDAY MAY RESULT IN MODERATE TO LOCALLY OVER 1 INCH AMOUNTS IN A 2 DAY PERIOD. ANY AMOUNTS OVER 1 INCH COULD HAVE ADDITIONAL IMPACTS TO FURTHER RAISING WATER LEVELS ON THE MISSISSIPPI RIVER. THE REMAINING SNOW COVER ACROSS NORTHERN PORTIONS OF MINNESOTA AND WISCONSIN CONTINUES TO MELT OVER THE NEXT COUPLE WEEKS...THE ADDITIONAL SNOW MELT WILL PROGRESS DOWNSTREAM ALONG THE MISSISSIPPI RIVER. THE RIVER RESPONSE TO THIS SECONDARY SNOW MELT IS EXPECTED TO CONTINUE INTO LATE APRIL. ..12.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && DLF/12
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 444 AM CDT SUN APR 10 2011 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-110945- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 444 AM CDT SUN APR 10 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT A WIND ADVISORY IS IN EFFECT FOR THE ENTIRE OUTLOOK AREA FROM 11 AM TO 8 PM TODAY. AN INTENSE LOW PRESSURE SYSTEM WILL TRACK FROM NEBRASKA TO NORTHWEST WISCONSIN TODAY. SUSTAINED SOUTH WINDS OF 30 TO 35 MPH WITH GUSTS TO 40 TO 50 MPH IS EXPECTED. DRIVERS OF HIGH PROFILE VEHICLES SHOULD USE EXTRA CAUTION. LOOSE OBJECTS MAY BE BLOWN AROUND BY THE VERY STRONG GRADIENT WINDS. A STRONG CAP WILL SUPPRESS THUNDERSTORM DEVELOPMENT FOR MUCH OF TODAY. HOWEVER...A COLD FRONT ARRIVING LATE THIS AFTERNOON IS EXPECTED TO WEAKEN THE CAP TO ALLOW FOR SCATTERED THUNDERSTORMS TO FORM ALONG THE FRONT. THE BEST CHANCES FOR STORMS WILL BE LATE THIS AFTERNOON INTO THE EVENING. THE TORNADO THREAT HAS DIMINISHED GREATLY AND NOW THE MAIN THREATS FROM THESE STORMS WILL BE DAMAGING WINDS OF 60 TO 70 MPH AND LARGE HAIL. A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS FROM ABOUT HIGHWAY 20 AND NORTHWARD INTO EASTERN MINNESOTA AND MUCH OF WISCONSIN. THE REMAINDER OF THE OUTLOOK AREA IS IN A SLIGHT RISK OF SEVERE STORMS FOR LATE THIS AFTERNOON INTO THE EVENING. VERY WARM TEMPERATURES OF 85 TO 90...STRONG SOUTH WINDS GUSTING TO 40 TO 50 MPH...MODERATE RELATIVE HUMIDITIES...AND DRIED VEGETATION WILL COMBINE TO RESULT IN AN EXTREME THREAT OF GRASS FIRES TODAY. GRASSLAND FIRE DANGER INDEX VALUES ARE WELL ABOVE 50 INDICATING THE POTENTIAL FOR EXPLOSIVE GRASS FIRE BEHAVIOR. AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THURSDAY AND FRIDAY...EPISODES OF LIGHT TO MODERATE RAINFALL TOTALS WITH POSSIBLY LOCALLY HEAVIER RAIN AMOUNTS ARE EXPECTED OVER THE 2 DAY TIME PERIOD FROM A LARGE SLOW MOVING STORM SYSTEM. ANY HEAVY RAIN TOTALS COULD RESULT IN FURTHER RISES ON THE ALREADY HIGH RIVER LEVELS ON THE MISSISSIPPI RIVER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM ABOUT 4 PM TO 10 PM TODAY INTO THIS EVENING. HAASE/NICHOLS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 554 PM CDT SUN APR 10 2011 IAZ067-068-078-ILZ015-024-102330- LOUISA-MERCER-MUSCATINE-ROCK ISLAND-SCOTT- 554 PM CDT SUN APR 10 2011 ...SMALL HAIL AND GUSTY WINDS... AT 552 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS 7 MILES WEST OF MANNON...OR NEAR WAPELLO...MOVING NORTHEAST AT 40 MPH. * THE THUNDERSTORM WILL BE NEAR... MANNON AROUND 600 PM CDT... ELIZA AROUND 605 PM CDT... ILLINOIS CITY AROUND 615 PM CDT... FAIRPORT AND 9 MILES NORTHWEST OF HAMLET AROUND 620 PM CDT... MONTPELIER AROUND 625 PM CDT... ANDALUSIA AND 8 MILES NORTHWEST OF TAYLOR RIDGE AROUND 630 PM CDT... HAIL UP TO PENNY SIZE...GUSTY WINDS OF 40 TO 50 MPH AND BRIEF HEAVY RAIN CAN BE EXPECTED WITH THESE STORMS. LAT...LON 4153 9086 4137 9059 4114 9110 4125 9119 TIME...MOT...LOC 2253Z 225DEG 35KT 4123 9109
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 559 PM CDT SUN APR 10 2011 IAZ089-099-ILZ024>026-034-102330- DES MOINES-HANCOCK-HENDERSON-LEE-MERCER-WARREN- 559 PM CDT SUN APR 10 2011 ...SMALL HAIL AND GUSTY WINDS... AT 557 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS 6 MILES WEST OF CARMAN...OR 6 MILES SOUTHWEST OF BURLINGTON...MOVING NORTHEAST AT 45 MPH. * THE THUNDERSTORMS WILL BE NEAR... GULF PORT...BURLINGTON...CARMAN AND WEST BURLINGTON AROUND 605 PM CDT... GLADSTONE AROUND 615 PM CDT... OQUAWKA AND 6 MILES NORTHWEST OF BIGGSVILLE AROUND 620 PM CDT... ROZETTA AROUND 625 PM CDT... HAIL UP TO PENNY SIZE AND WIND GUSTS OF 40 TO 50 MPH CAN BE EXPECTED WITH THESE STORMS. LAT...LON 4110 9091 4089 9058 4061 9116 4073 9133 TIME...MOT...LOC 2258Z 223DEG 38KT 4074 9116
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
647 PM CDT SUN APR 10 2011
ILZ015-016-024-110015-
HENRY-MERCER-ROCK ISLAND-
647 PM CDT SUN APR 10 2011
...STRONG THUNDERSTORM WITH SMALL HAIL AND GUSTY WINDS...
AT 641 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR NEW WINDSOR...OR 14 MILES EAST OF ALEDO...
MOVING NORTHEAST AT 55 MPH.
* THE THUNDERSTORM WILL BE NEAR...
6 MILES SOUTHEAST OF ORION AROUND 650 PM CDT...
CAMBRIDGE AROUND 655 PM CDT...
GENESEO AROUND 700 PM CDT...
HAIL UP TO PENNY SIZE AND GUSTY WINDS OF 40 TO 50 MPH CAN BE EXPECTED
WITH THIS STORM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT MONDAY MORNING FOR
SOUTHEASTERN IOWA AND NORTHWESTERN ILLINOIS AND NORTHEAST MISSOURI.
LAT...LON 4133 8989 4114 9029 4115 9043 4110 9044
4118 9056 4154 9023
TIME...MOT...LOC 2346Z 226DEG 48KT 4122 9040The Quad Cities radar (KDVN), 107 km away, was scanning. The volume nearest the first event began at 01:13 UTC.
1 thunderstorm wind. Local standard time, as filed.
A 66 mph wind gust was measured by the AWOS at the Mount Pleasant, IA Airport at 815 pm CDT April 10.
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, April 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: 287129.