Flash Flooding and Flooding in Iowa, September 9 to 12, 2014

Name: Flash Flooding and Flooding in Iowa, September 9 to 12, 2014
Start: 2014-09-09T12:35
End: 2014-09-12T20:45
Location: Iowa

September 9 to 12, 2014 · NWS DMX · 108 events in 22 counties and zones

S. S.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $3.0 million
Crop damage: $1.5 million
Events: 108

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.

What happened

The episode as NWS DMX wrote it up.

Deep moisture moved into Iowa as a strong shortwave moved into the central U.S. Moisture from former hurricane Norbert moved into the central U.S. as a low pressure system developed over Kansas. The low from Kansas moved northeast into Iowa during the night of the 9th and morning of the 10th. The low was over southwest Wisconsin on the morning of the 10th. The atmosphere was unstable with 1000 to 2000 J/kg of CAPE available. CAPE in the -10 to -30 C layer of the atmosphere was in the 300 to 600 J/kg range with downdraft CAPE around 500 J/kg. Strong shear was present with 45 to 65 kts of effective shear. The LCL was fairly low, between 500 and 750 meters. A deep cloud depth was present with the freezing level around 14,000 feet. Precipitable water values increased through the afternoon and evening of the 9th and were greater than 2 inches over a large part of the state. Very little severe weather occurred with the system. A severe cell moved across southwest Iowa and produced 1 to 2 inch diameter hail in Adams and Taylor Counties. Severe winds were also reported in Adams County with several trees blown down. The primary event was the heavy rainfall. Two to six inches of rain fell over the south half of the state. The heaviest band extended from the southwest into the central parts of the Des Moines CWA. Four to Six inches of rain fell from near Creston through Indianola to Oskaloosa resulting in widespread flash flooding. The highest rainfall report was in the Afton area of Union County with 8.8 inches reported. Numerous roads and bridges were washed out in the area. Heavy rainfall across much of south central Iowa left 8 counties still in Areal Flood Warnings on the 10th. Many roads washed out and some bridges were washed out in Clarke, Ringgold and Madison Counties. Other counties continued with some flooded roads or flooded low water crossings. There was one water rescue in the early morning hours in Madison County that included two separate vehicles at different times. The vehicles hit a low water crossing at 1700 Pitzer Rd and stalled. Both occupants were rescued at the same time by local law enforcement. No injuries were reported with the water rescues. Some rivers went into flood as well with minor and close to moderate flooding occurring within the next few days. Most of the flashy creeks and streams near larger metropolitan areas the CWA were not affected...but smaller streams in some of the more rural counties were the main ones affected. River flooding occurred in parts of central and southeast Iowa from the 10 through the 12th. The South, Middle, and North Rivers rose above flood state by one to three feet. The mainstem Des Moines River at Ottumwa crested about a foot over flood stage. The Raccoon River also flooded in Des Moines at Fleur Drive with the river cresting about two and one half feet above flood stage.

What forecasters said that day

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 Sep 9, 11:35 AM CST, 1 hour earlier.

Area forecast discussion, Sep 9, 11:35 AM CST, 1 hour before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
1235 PM CDT TUE SEP 9 2014

.SHORT TERM /TODAY/...
ISSUED AT 403 AM CDT TUE SEP 9 2014

ONGOING MCS OVER EASTERN IOWA CONTINUES TO BACK BUILD OVER THE FAR
EASTERN SECTIONS OF THE FORECAST AREA...BUT MOST OF THE MODELS HAVE
MISPLACED THE INITIAL DEVELOPMENT AND SUBSEQUENT POSITION BY PLACING
THE SYSTEM BACK TOO FAR INTO OUR AREA. THUS...SOME DEVELOPMENT IS
TAKING PLACE AND SHOULD BACK BUILD ACROSS THE EAST AND SOUTHEAST
THIS MORNING...BUT NOT TO THE EXTENT THAT HAD BEEN FORECAST OVER THE
PAST 24 HOURS. THIS THUNDER IS OCCURRING IN A ZONE OF WARM AIR
ADVECTION COMBINED WITH A WEAK WAVE RIPPLING THROUGH THE FLOW OVER A
SFC WARM FRONT NOW LOCATED OVER CENTRAL IOWA. TEMPS CONTINUE TO
STABILIZE AND HAVE ACTUALLY INCREASED A BIT OVERNIGHT WITH THE FRONT
MOVING NORTH...SO MORNING LOWS WILL REMAIN ABOUT WHERE WE ARE NOW
AND HIGHS TODAY WILL MOVE UP INTO THE UPPER 70S NORTH TO LOWER 80S
SOUTH. AN AREA OF PARTIAL CLEARING WITH MAINLY MID TO UPPER LEVEL
CLOUDS HAS DEVELOPED OVER MUCH OF THE NORTH/NORTHWEST AND THIS TREND
WILL CONTINUE INTO THE MORNING HOURS AS THE EASTERN IOWA MCS
STRUGGLES TO BACKBUILD ACROSS THE SOUTHEAST AND SOUTH DURING THE
MORNING. HOURS. THERE ARE TWO DISTINCT WAVES IN THE STRONG WEST
SOUTH WESTERLY FLOW HEADING TOWARD THE REGION LATER TODAY. THE
LEADING WAVE ON WATER VAPOR IMAGERY IS SHOWING UP OVER WYOMING AND
WILL MOVE INTO NORTHWEST IOWA BY 00Z. THIS WILL HELP TO INITIATE AN
AREA OF THUNDERSTORMS ACROSS THE WEST AND NORTHWEST BETWEEN 20Z AND
00Z THIS AFTERNOON AS THE AREAL COVERAGE EXPANDS RAPIDLY IN THE
AFTERNOON HOURS. UNTIL THEN...THE MAIN FOCUS FOR ANY ACTIVITY WILL
GENERALLY BE IN THE CHANCE CATEGORY OVER THE SOUTH AND SOUTHWEST
NEARER THE IOWA/MISSOURI BORDER. AS A SECOND STRONGER WAVE OVER
SOUTHERN UTAH/IDAHO NOW...REACHES THE COLORADO/NEBRASKA/NW KANSAS
TRI STATE AREA...A SFC LOW WILL CONSOLIDATE OVER IOWA THIS EVENING
AS SIGNIFICANT FORCING DEVELOPS AT ALL LEVELS. AS PER PREVIOUS
FORECASTS...THE MODELS HAVE BEEN ADVERTISING MANY SIGNIFICANT
PARAMETERS FOR HEAVY RAINFALL...PWATS INCREASING TO 1.75 TO 2 INCHES
SOUTHWEST BY 00Z...WARM CLOUD DEPTHS TO 13KFT BY 00Z SOUTHWEST AS
WELL. WITH THE EXPANDING FORCING BY 00Z...ALREADY LOOKING AT THE
POTENTIAL FOR SOME ISOLATED LOCALLY HEAVY RAINFALL LATE IN THE
AFTERNOON. INSTABILITY INCREASES BY LATE AFTERNOON AS WELL WITH SCT
THUNDERSTORMS BECOMING MORE NUMEROUS BY LATE AFTERNOON WITH AN
INCREASING THREAT FOR SEVERE WEATHER ACROSS THE WEST/SOUTHWEST. LOW
LEVEL BULK SHEAR/SRH/AND INSTABILITY BECOMES MORE FAVORABLE FOR SOME
TORNADOS AS WELL NEARER THE WARM FRONT ACROSS THE WEST/SOUTHWEST/
/SOUTH DURING THE LATE AFTERNOON HOURS AND EVENING HOURS GENERALLY
ALONG AND SOUTH OF US30 AND WEST OF I35 EARLY...POSSIBLY EXTENDING
EAST AFTER 00Z AS WELL. AS THE CONVECTION INCREASES...AND MERGES
DURING THE MID EVENING HOURS...THE BIGGER THREAT WILL TURN TOWARD
HEAVY RAINFALL AND WIND FOR THE REMAINDER OF THE NIGHT.

.LONG TERM /TONIGHT THROUGH MONDAY/...
ISSUED AT 403 AM CDT TUE SEP 9 2014

FOCUS WILL BE ON THE SYSTEM TO IMPACT THE AREA MAINLY TONIGHT INTO
EARLY WEDNESDAY AND TEMPERATURES THROUGHOUT THE FORECAST PERIOD.
LARGE AREA OF SFC LOW PRESSURE EXPECTED TO BE CENTERED ACROSS WRN
KS/SE CO AT THE START OF THE PERIOD AT 00Z THIS EVENING...WITH AN
ASSOCIATED WARM FRONT STRETCHING ENE THROUGH ERN NE/SE SD INTO SRN
MN. ELONGATED TROUGH AXIS TO STRETCH FROM WESTERN IOWA SOUTHWESTWARD
THROUGH CENTRAL KS BY 06Z WITH THE TRIPLE POINT TRAVELING ACROSS
NORTHWEST IOWA LATE THIS EVENING INTO THE OVERNIGHT HOURS. SFC LOW
EXPECTED TO DEEPEN AS IT LIFTS NORTHEAST THROUGH THE REGION WITH
STRONG SOUTHERLY FLOW SETTING UP ACROSS THE STATE. 40-50KT LLJ SETS
UP TONIGHT AIMING RIGHT INTO CENTRAL/EASTERN IOWA...WITH A
TREMENDOUS AMOUNT OF MOISTURE STREAMING NORTH INTO THE STATE. PWAT
VALUES INCREASE TO 1.8 TO NEARLY 2 INCHES ACROSS THE STATE TONIGHT.
A LARGE AREA OF THUNDERSTORMS ARE EXPECTED TO FIRE IN THE WARM
SECTOR ACROSS ERN NE/WRN IA AND SPREAD EASTWARD ACROSS THE CWA THIS
EVENING. ACTIVITY EXPECTED TO GROW INTO A LARGE MCS IMPACTING MUCH
OF THE CWA THROUGH THE NIGHT. SOUNDINGS INDICATING AROUND 2-3K J/KG
OF CAPE ALONG WITH DECENT LOW LEVEL AND DEEP LAYER SHEAR. THEREFORE
SEVERE WEATHER CHANCES ARE ALSO OF CONCERN ESPECIALLY IN THE
EVENING. OF GREATER CONCERN IS ON HYDRO CONDITIONS...WITH THE
ABUNDANT MOISTURE EXPECTED TO BE IN PLACE. NEARLY SATURATED
SOUNDINGS...SUGGESTING EFFICIENT RAINFALL PRODUCTION WITH FAIRLY
HIGH FZ LVLS. INTENSE RAINFALL RATES ARE EXPECTED...AND EVEN THOUGH
THE ACTIVITY MAY BE FAIRLY PROGRESSIVE A LARGE AREA OF THUNDERSTORMS
IS EXPECTED SO THE DURATION MAY STILL BE QUITE LONG. HAVE WIDESPREAD
RAINFALL AMOUNTS OF 1-2 INCHES...WITH AROUND 3 INCHES POSSIBLE
ACROSS PORTIONS OF CENTRAL AND SOUTHERN IOWA. LOCALLY HIGHER AMOUNTS
WILL BE POSSIBLE BENEATH THE MOST INTENSE STORMS. FLASH FLOOD
GUIDANCE IS AROUND 1.8 TO 2 INCHES FOR 1 HOUR AND UP TO 2.5 INCHES
TO 3 INCHES FOR 3 HOUR AND 6 HOUR RESPECTIVELY. THEREFORE DECENT
POSSIBILITY THAT COULD SEE THESE GUIDANCE VALUES EXCEEDED...ALONG
WITH THE INCREASED THREAT OF FLASH FLOODING IN URBAN AREAS DUE TO
THE INTENSE RAINFALL RATES EXPECTED. THEREFORE HAVE ISSUED A FLASH
FLOOD WATCH FOR THE ENTIRE CWA FOR TONIGHT...ALTHOUGH THE GREATEST
CHANCE FOR FLASH FLOODING WILL MAINLY BE ALONG THE HWY 30/I80/HWY 92
CORRIDORS.

SYSTEM QUICKLY LIFTS NORTHEAST OF THE STATE WEDNESDAY...WITH SOME
LINGERING STORMS EXPECTED TO MOVE OUT OF THE CWA WEDNESDAY MORNING.
SOME LIGHT SHOWERS ARE STILL POSSIBLE THROUGH THE DAY AS A PORTION
OF THE DEF ZONE WILL STILL BE IN PLACE ACROSS THE CWA. OTHERWISE
MUCH DRIER AND COOLER AIR WILL BE USHERED IN ON THE BACKSIDE OF THIS
SYSTEM. VERY TIGHT PRESSURE GRADIENT AND STRONG CAA IS EXPECTED TO
BRING WINDY CONDITIONS TO THE AREA FOR WEDNESDAY. MODELS CURRENTLY
INDICATING H85 WINDS OF AROUND 20 KTS...BUT WOULD NOT BE SURPRISED
IF WINDS WERE STRONGER AND COULD APPROACH WIND ADVISORY CRITERIA FOR
WEDNESDAY. OTHERWISE H85 TEMPS DROP INTO THE SINGLE DIGITS ABOVE
ZERO CELSIUS WITH THE 0C LINE DROPPING INTO NORTHERN IOWA BY
THURSDAY. THIS WILL BRING WELL BELOW AVERAGE TEMPERATURES FOR
WEDNESDAY THROUGH THE END OF THE WORK WEEK. ANOTHER STRONG UPPER
LEVEL WAVE TO DROP OUT OF THE ROCKIES THROUGH THE CENTRAL US BY
FRIDAY...WHICH WILL BRING ANOTHER CHANCE FOR SHOWERS TO THE STATE
FOR THE END OF THE WORK WEEK. H85 TEMPS ALOFT REMAIN CHILLY THROUGH
THE WEEKEND WITH A LARGE AREA OF HIGH PRESSURE IN PLACE. THEREFORE
EXPECTED THE WELL BELOW AVERAGE TEMPERATURES TO CONTINUE INTO THE
WEEKEND AND EARLY NEXT WEEK. FRIDAY NIGHT LOOKS QUITE COOL..WITH
TEMPS POSSIBLY DROPPING INTO THE 30S ACROSS MUCH OF THE STATE. THERE
IS THE CHANCE THAT CLOUD COVER WILL LINGER LONGER BEHIND THE UPPER
LEVEL WAVE PUSHING THROUGH DURING THE DAY WHICH COULD KEEP TEMPS A
BIT WARMER FRIDAY NIGHT.

&&

.AVIATION...09/18Z
ISSUED AT 1235 PM CDT TUE SEP 9 2014

THUNDERSTORMS ARE ERUPTING OVER SW IA IN A ZONE OF WARM ADVECTION
AHEAD OF A WARM FRONT.  THESE STORMS ARE EXPECTED TO LIFT NORTHEAST
THROUGH 00Z.  LATER TONIGHT LOW PRESSURE OVER KS WILL RAPIDLY LIFT
INTO IA AND DEEPEN.  ADDITIONAL STORMS ARE EXPECTED ALONG A COLD
FRONT THAT WILL SHIFT ACROSS THE TAF SITES THROUGH 18Z WED.  HEAVY
RAINFALL WILL OCCUR WITH STORMS OVERNIGHT.  PRIOR TO THAT...BETWEEN
00Z AND 06Z STORMS COULD BE SEVERE WITH DAMAGING WIND AND LARGE HAIL
POSSIBLE.  SOUTHERLY SFC WIND AT 15-25KTS WILL BECOME NWRLY AND
INCREASE LATE TONIGHT THROUGH WEDNESDAY MORNING AS THE PRESSURE
GRADIENT TIGHTENS WITH THE DEEPENING LOW MOVING ACROSS CENTRAL IOWA.

&&

.HYDROLOGY...
ISSUED AT 403 AM CDT TUE SEP 9 2014

MAIN CONCERNS CONTINUE TO BE HEAVY RAINFALL POTENTIAL WITH
POSSIBILITY OF FLASH FLOODING AND SOME RIVERS AND STREAMS ACROSS
THE EASTERN AND CENTRAL AREAS THAT MAY RISE TO WITHIN BANKFULL OR
SLIGHTLY ABOVE FLOOD STAGE BY LATE TUESDAY NIGHT OR WEDNESDAY
THROUGH FRIDAY FOR THE LARGER MAIN STEM RIVERS. WITH THE PROSPECT
OF HIGH RAINFALL RATES FOR AN HOUR OR MORE MAINLY TUESDAY EVENING
INTO EARLY WEDNESDAY...THERE MAY BE SOME URBAN RUNOFF ISSUES AS
WELL LEADING TO STREET FLOODING AND PONDING OF WATER IN FIELDS AS
WELL AS LOW WATER CROSSINGS BOTH IN URBAN AND RURAL AREAS.
WIDESPREAD RAINFALL AMOUNTS OF 1 TO 2 INCHES...WITH LOCALLY
HIGHER AMOUNTS OF MORE THAN 3 INCHES ARE POSSIBLE THROUGH EARLY
WEDNESDAY MORNING.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM THIS EVENING THROUGH WEDNESDAY MORNING
FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-BLACK HAWK-BOONE-BREMER-BUTLER-
CALHOUN-CARROLL-CASS-CERRO GORDO-CLARKE-CRAWFORD-DALLAS-DAVIS-
DECATUR-EMMET-FRANKLIN-GREENE-GRUNDY-GUTHRIE-HAMILTON-HANCOCK-
HARDIN-HUMBOLDT-JASPER-KOSSUTH-LUCAS-MADISON-MAHASKA-MARION-
MARSHALL-MONROE-PALO ALTO-POCAHONTAS-POLK-POWESHIEK-RINGGOLD-SAC-
STORY-TAMA-TAYLOR-UNION-WAPELLO-WARREN-WAYNE-WEBSTER-WINNEBAGO-
WORTH-WRIGHT.

&&

SHORT TERM...REV
LONG TERM...BEERENDS
AVIATION...FAB
HYDROLOGY...BEERENDS

Hazardous weather outlook, Sep 9, 3:55 AM CST, 8 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
455 AM CDT TUE SEP 9 2014

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-101000-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-
POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION-MAHASKA-ADAMS-UNION-
CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD-DECATUR-WAYNE-
APPANOOSE-DAVIS-
455 AM CDT TUE SEP 9 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO
THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES
FOR FURTHER DETAILS.

THUNDERSTORMS ARE EXPECTED ACROSS THE AREA TODAY INTO TONIGHT.
THERE IS A SLIGHT RISK OF SEVERE WEATHER MAINLY LATE THIS
AFTERNOON INTO TONIGHT. THE MAIN SEVERE THREATS WILL BE DAMAGING
WINDS...AND TO A LESSER DEGREE LARGE HAIL OR AN ISOLATED TORNADO.
HEAVY RAINFALL IS ALSO EXPECTED ALONG WITH THE POSSIBILITY OF
FLASH FLOODING TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A FEW LINGERING NON SEVERE THUNDERSTORMS ARE POSSIBLE WEDNESDAY
MORNING. NORTHWESTERLY WINDS MAY APPROACH 25 TO 30 MPH WITH
HIGHER GUSTS WEDNESDAY. TEMPERATURES FRIDAY NIGHT MAY FALL INTO
THE MID 30S WHICH COULD POTENTIALLY LEAD TO FROST FORMATION IN
ISOLATED AREAS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON INTO TONIGHT.

MJB

In the hours before

Special weather statement, Sep 9, 6:49 AM CST, 5 hours 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
749 AM CDT TUE SEP 9 2014

IAZ004-005-015-023-024-033>035-044>046-057-091600-
EMMET-KOSSUTH-PALO ALTO-POCAHONTAS-HUMBOLDT-SAC-CALHOUN-WEBSTER-
CRAWFORD-CARROLL-GREENE-AUDUBON-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...EMMETSBURG...
POCAHONTAS...LAURENS...ROLFE...FONDA...GILMORE CITY...HUMBOLDT...
SAC CITY...LAKE VIEW...ODEBOLT...WALL LAKE...SCHALLER...EARLY...
ROCKWELL CITY...MANSON...LAKE CITY...POMEROY...FORT DODGE...
DENISON...CARROLL...JEFFERSON...AUDUBON...EXIRA
749 AM CDT TUE SEP 9 2014

...FOG IS DEVELOPING ACROSS THE REGION THIS MORNING...

FOG...DENSE AT TIMES...IS DEVELOPING OVER PORTIONS OF WESTERN AND
NORTHWESTERN IOWA EARLY TODAY. THE FOG MAY PERSIST FOR SEVERAL
HOURS THIS MORNING BEFORE SOME IMPROVEMENT IS NOTED. VISIBILITY
HAS DROPPED TO ONE QUARTER MILE OR LESS AT TIMES OVER FAR
NORTHWEST IOWA. PERSONS TRAVELING ACROSS THE REGION EARLY TODAY
SHOULD ALLOW FOR EXTRA TRAVEL TIME...EXTRA DISTANCE BETWEEN YOU
AND THE VEHICLE IN FRONT OF YOU...AND USE LOW BEAM HEADLIGHTS.
ALSO BE ESPECIALLY CAUTIOUS NEAR INTERSECTIONS AND RAILROAD
CROSSINGS AS TRAINS AND VEHICLES MAY BE HIDDEN FROM VIEW BY THE
FOG.

REV

Special weather statement, Sep 9, 11:51 AM CST, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1251 PM CDT TUE SEP 9 2014

IAZ072-082-083-091845-
MADISON IA-UNION IA-CLARKE IA-
1251 PM CDT TUE SEP 9 2014

...STRONG THUNDERSTORMS DEVELOPING ACROSS SOUTHWEST IOWA...

AT 1250 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR CRESTON...MOVING NORTHEAST AT 25 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTH CENTRAL
MADISON...NORTHWESTERN CLARKE AND CENTRAL UNION COUNTIES...INCLUDING
THE FOLLOWING LOCATIONS...LORIMOR...EAST PERU...AFTON AND CRESTON
MUNICIPAL AIRPORT.

LAT...LON 4094 9436 4102 9444 4127 9400 4115 9378
TIME...MOT...LOC 1750Z 243DEG 22KT 4102 9432

BOKSA

Special weather statement, Sep 9, 11:59 AM CST, 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1259 PM CDT TUE SEP 9 2014

IAZ044-045-057-058-070-071-092000-
CRAWFORD-CARROLL-AUDUBON-GUTHRIE-CASS-ADAIR-
INCLUDING THE CITIES OF...DENISON...CARROLL...AUDUBON...EXIRA...
GUTHRIE CENTER...PANORA...BAYARD...CASEY...ATLANTIC...
GREENFIELD...STUART...ADAIR...FONTANELLE
1259 PM CDT TUE SEP 9 2014

...STRONG THUNDERSTORMS DEVELOPING OVER SOUTHWEST IOWA...

THUNDERSTORMS THAT WERE OVER SOUTHEAST NEBRASKA WERE EXPANDING TO
THE NORTHEAST AND INTENSIFYING. CURRENTLY A LINE OF STORMS EXTENDS
FROM KIMBALLTON SOUTHEAST TOWARDS CRESTON. THE STORMS ARE MOVING
NORTHEAST AROUND 25 MPH. WIND GUSTS TO 50 MPH ALONG WITH TORRENTIAL
RAINFALL AND DIME TO NICKEL SIZED HAIL. IF STORMS APPROACH YOUR
AREA SEEK SHELTER INDOORS UNTIL THE STORM PASSES.

FAB

The radar

The Des Moines radar (KDMX), 63 km away, was scanning. The volume nearest the first event began at 18:35 UTC.

Open the radar archive at this moment

Event by event

65 heavy rain, 19 flash flood, 16 flood, 4 thunderstorm wind, 4 hail. Local standard time, as filed.

Thunderstorm Wind, Guthrie

When: September 9, 12:35 PM CST
Where: Guthrie County, Menlo
Measured: 62 kt (71 mph) estimated gust
Property damage: $10,000
Reported by: Emergency Manager
Coordinates: 41.520, -94.420

Four foot diameter tree down in town.

Thunderstorm Wind, Guthrie

When: September 9, 12:40 PM CST
Where: Guthrie County, Stuart
Measured: 56 kt (64 mph) estimated gust
Property damage: $10,000
Reported by: Emergency Manager
Coordinates: 41.500, -94.320

Ten inch diameter trees down in town.

Hail, Adams

When: September 9, 3:40 PM CST
Where: Adams County, 3.42 mi ENE of Iveyville
Measured: 2 in hail
Property damage: $10,000
Crop damage: $10,000
Reported by: Public
Coordinates: 40.920, -94.720

Thunderstorm Wind, Adams

When: September 9, 3:50 PM CST
Where: Adams County, 3.5 mi E of Corning
Measured: 61 kt (70 mph) estimated gust
Property damage: $75,000
Crop damage: $100,000
Reported by: Emergency Manager
Coordinates: 40.980, -94.663

Heavy damage to a machine shed and trees caused by strong straight-line winds.

Hail, Taylor

When: September 9, 4:05 PM CST
Where: Taylor County, 0.52 mi W of Lenox
Measured: 2 in hail
Property damage: $10,000
Crop damage: $10,000
Reported by: Social Media
Coordinates: 40.880, -94.560

Hail, Adams

When: September 9, 4:10 PM CST
Where: Adams County, 3.49 mi S of Stringtown
Measured: 1.75 in hail
Property damage: $5,000
Crop damage: $10,000
Reported by: Emergency Manager
Coordinates: 40.920, -94.560

Hail, Taylor

When: September 9, 4:20 PM CST
Where: Taylor County, 1.48 mi SSW of Lenox
Measured: 1 in hail
Crop damage: $10,000
Reported by: Social Media
Coordinates: 40.860, -94.560

Heavy Rain, Clarke

When: September 9, 5:21 PM CST
Where: Clarke County, 1.25 mi ESE of Murray
Reported by: Fire Department/Rescue
Coordinates: 41.040, -93.950

Rainfall of 2.08 inches in 38 minutes.

Heavy Rain, Union

When: September 9, 5:40 PM CST
Where: Union County, 0.87 mi NW of Shannon City
Reported by: Emergency Manager
Coordinates: 40.910, -94.260

Three inches of rain in the past 2 hours.

Flash Flood, Warren

When: September 9, 5:40 PM CST to September 10, 5:15 AM CST
Where: Warren County, 1.38 mi N of Norwalk to 0.89 mi NNE of Norwalk
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $500,000
Reported by: Law Enforcement
Coordinates: 41.500, -93.680

Water 3 to 5 feet deep reported on Cherry Street.

Heavy Rain, Union

When: September 9, 5:43 PM CST
Where: Union County, Arispe
Reported by: Emergency Manager
Coordinates: 40.950, -94.220

Four inches of rain in the past 2 hours.

Heavy Rain, Warren

When: September 9, 5:55 PM CST
Where: Warren County, 1.04 mi W of New Virginia
Reported by: Trained Spotter
Coordinates: 41.180, -93.750

Rainfall of 3.8 inches in the past hours, 4.5 inches through the afternoon and evening.

Heavy Rain, Union

When: September 9, 6:00 PM CST
Where: Union County, 0.52 mi E of Creston Arpt
Reported by: AWOS
Coordinates: 41.020, -94.360

Rainfall of 2.20 inches in the past 3 hours.

Heavy Rain, Clarke

When: September 9, 6:09 PM CST
Where: Clarke County, 2.95 mi SSW of Murray
Reported by: Trained Spotter
Coordinates: 41.010, -93.990

Rainfall of 2.9 inches in the past hour.

Thunderstorm Wind, Decatur

When: September 9, 6:25 PM CST
Where: Decatur County, 2 mi S of Leon
Measured: 52 kt (60 mph) estimated gust
Property damage: $10,000
Reported by: Law Enforcement
Coordinates: 40.701, -93.730

Large tree branches reported down.

Heavy Rain, Union

When: September 9, 6:38 PM CST
Where: Union County, Afton
Reported by: Social Media
Coordinates: 41.030, -94.200

Rainfall of 6.10 inches through the afternoon and evening.

Heavy Rain, Union

When: September 9, 6:39 PM CST
Where: Union County, 7.6 mi ESE of Arispe
Reported by: Public
Coordinates: 40.920, -94.080

Three inches of rainfall.

Flash Flood, Union

When: September 9, 6:47 PM CST to September 10, 5:00 AM CST
Where: Union County, 3.72 mi E of Kent to 0.36 mi SE of Kent
Cause: Heavy Rain
Property damage: $200,000
Crop damage: $50,000
Reported by: Emergency Manager
Coordinates: 40.940, -94.380

Water over many secondary roads in southern Union County. Water in areas that rarely see flooding.

Heavy Rain, Adams

When: September 9, 6:55 PM CST
Where: Adams County, 0.87 mi NW of Corning
Reported by: Social Media
Coordinates: 40.990, -94.740

Rainfall of 2 inches so far tonight.

Heavy Rain, Warren

When: September 9, 6:56 PM CST
Where: Warren County, 0.69 mi S of Indianola
Reported by: Social Media
Coordinates: 41.360, -93.570

Rainfall of 2.65 inches today.

Heavy Rain, Mahaska

When: September 9, 7:00 PM CST
Where: Mahaska County, 3.49 mi S of Lacey
Reported by: Mesonet
Coordinates: 41.350, -92.660

Rainfall of 2.06 inches this evening.

Heavy Rain, Union

When: September 9, 7:00 PM CST to September 10, 7:00 PM CST
Where: Union County, Afton
Reported by: Social Media
Coordinates: 41.030, -94.200

Rainfall for the past 24 hours was 8.8 inches.

Heavy Rain, Madison

When: September 9, 7:01 PM CST
Where: Madison County, 0.86 mi SE of Earlham
Reported by: Social Media
Coordinates: 41.490, -94.120

Rainfall of 3.34 inches from two rounds of storms this afternoon and evening.

Heavy Rain, Clarke

When: September 9, 7:03 PM CST
Where: Clarke County, 3.71 mi W of Jamison
Reported by: Social Media
Coordinates: 41.140, -93.800

Rainfall of 2.49 inches this afternoon and evening.

Heavy Rain, Adair

When: September 9, 7:06 PM CST
Where: Adair County, 0.86 mi NE of Greenfield
Reported by: Social Media
Coordinates: 41.310, -94.460

Rainfall of 2 inches in two rounds of storms this afternoon and evening.

Heavy Rain, Marion

When: September 9, 7:15 PM CST
Where: Marion County, 1.25 mi ENE of Bussey
Reported by: Social Media
Coordinates: 41.210, -92.880

Rainfall of 3.6 inches this afternoon and evening.

Heavy Rain, Warren

When: September 9, 7:17 PM CST
Where: Warren County, 2.14 mi SSW of Ackworth
Reported by: Mesonet
Coordinates: 41.340, -93.490

Total rainfall in the last three hours was 2.63 inches.

Heavy Rain, Madison

When: September 9, 7:39 PM CST
Where: Madison County, 2.68 mi ESE of Winterset
Reported by: Social Media
Coordinates: 41.320, -93.970

Rainfall of three inches.

Heavy Rain, Ringgold

When: September 9, 8:00 PM CST
Where: Ringgold County, 0.87 mi NW of Redding
Reported by: Social Media
Coordinates: 40.610, -94.390

Rainfall this afternoon and evening was 3.16 inches.

Heavy Rain, Marion

When: September 9, 8:20 PM CST
Where: Marion County, 0.86 mi SE of Pella
Reported by: Social Media
Coordinates: 41.410, -92.920

Rainfall this afternoon and evening was 2.65 inches.

Heavy Rain, Cass

When: September 9, 8:40 PM CST
Where: Cass County, 0.52 mi E of Atlantic
Reported by: Social Media
Coordinates: 41.400, -95.010

Rainfall of 3 inches this evening.

Heavy Rain, Decatur

When: September 9, 9:00 PM CST
Where: Decatur County, (30i)lamoni Muni Arp
Reported by: ASOS
Coordinates: 40.630, -93.900

Three hour total of 3.16 inches, 3.20 inches for the day.

Flash Flood, Madison

When: September 9, 9:00 PM CST to September 10, 2:48 AM CST
Where: Madison County, 2.14 mi NNE of Barney to 1.06 mi N of Barney
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.200, -94.020

Water was over the road in the 3100 block of 330th Street.

Flash Flood, Madison

When: September 9, 9:00 PM CST to September 10, 2:48 AM CST
Where: Madison County, 3.46 mi SW of Winterset to 4.7 mi WSW of Winterset
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $10,000
Reported by: Law Enforcement
Coordinates: 41.290, -94.060

The 2400 block of Pammel Park Road was flooded.

Flash Flood, Madison

When: September 9, 9:00 PM CST to September 10, 2:48 AM CST
Where: Madison County, 1.9 mi SW of Winterset to 3.5 mi SW of Winterset
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.309, -94.043

Water was over the road in the 2400 block of Carver Road.

Flash Flood, Ringgold

When: September 9, 9:00 PM CST to September 10, 5:01 AM CST
Where: Ringgold County, 7.43 mi WNW of Westerville to 6.63 mi WNW of Tingley
Cause: Heavy Rain
Property damage: $200,000
Crop damage: $50,000
Reported by: Law Enforcement
Coordinates: 40.883, -94.086

Numerous roads were under water across the county including water over the road on the bridge of P64, a gravel road and water over the road at 210th ave with some damage to the road.

Heavy Rain, Decatur

When: September 9, 9:05 PM CST
Where: Decatur County, 0.87 mi NW of Davis City
Reported by: Mesonet
Coordinates: 40.640, -93.810

Rainfall in the past 3 hours was 3.35 inches.

Heavy Rain, Mahaska

When: September 9, 9:06 PM CST
Where: Mahaska County, 0.52 mi E of Oskaloosa Muni Arpt
Reported by: AWOS
Coordinates: 41.230, -92.490

Rainfall of 3 inches this afternoon and evening.

Heavy Rain, Mahaska

When: September 9, 9:10 PM CST
Where: Mahaska County, 0.86 mi SE of Oskaloosa
Reported by: SNOTEL
Coordinates: 41.290, -92.640

Rainfall of 3.50 inches through the afternoon and evening.

Heavy Rain, Union

When: September 9, 9:59 PM CST
Where: Union County, 1.04 mi E of Afton
Reported by: Mesonet
Coordinates: 41.030, -94.180

Rainfall of 3.66 inches for the afternoon and evening.

Flash Flood, Madison

When: September 9, 10:00 PM CST to September 10, 2:45 AM CST
Where: Madison County, 6.8 mi N of Bevington to 6.41 mi N of Bevington
Cause: Heavy Rain
Property damage: $10,000
Reported by: Public
Coordinates: 41.468, -93.791

Water was reported over 10th Ave from Badger Creek.

Heavy Rain, Appanoose

When: September 9, 10:04 PM CST
Where: Appanoose County, 1.73 mi NW of Sedan
Reported by: Public
Coordinates: 40.690, -92.770

Rainfall total for the day was 3.32 inches.

Flash Flood, Cass

When: September 9, 10:30 PM CST to September 10, 2:50 AM CST
Where: Cass County, 0.52 mi E of Atlantic to 1.84 mi SSW of Atlantic
Cause: Heavy Rain
Property damage: $15,000
Reported by: Law Enforcement
Coordinates: 41.400, -95.010

Bull Creek was out of its banks.

Heavy Rain, Warren

When: September 9, 10:59 PM CST
Where: Warren County, 1.25 mi ESE of Spring Hill
Reported by: Amateur Radio
Coordinates: 41.410, -93.650

Rainfall of 4.20 inches for the day.

Flash Flood, Clarke

When: September 9, 11:30 PM CST to September 10, 5:15 AM CST
Where: Clarke County, 1.25 mi ESE of Osceola to 3.1 mi N of Osceola
Cause: Heavy Rain
Property damage: $150,000
Crop damage: $50,000
Reported by: Social Media
Coordinates: 41.020, -93.760

Highway 69 south of town closed due to water from a creek over the road. Several other roads in town flooded.

Flash Flood, Warren

When: September 9, 11:48 PM CST to September 10, 5:21 AM CST
Where: Warren County, 0.81 mi NE of Cumming to 2.33 mi W of New Virginia
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.488, -93.758

Numerous roads underwater across the county.

Heavy Rain, Adair

When: September 10, 12:05 AM CST
Where: Adair County, 0.86 mi NE of Greenfield
Reported by: Social Media
Coordinates: 41.310, -94.460

Rainfall of 4.25 inches for the day.

Flood, Warren

When: September 10, 1:45 AM CST to September 11, 3:45 AM CST
Where: Warren County, 0.86 mi SE of Churchville to 0.86 mi E of Wick
Cause: Heavy Rain
Property damage: $100,000
Reported by: Official NWS Observations
Coordinates: 41.390, -93.760

Heavy Rain, Warren

When: September 10, 2:00 AM CST
Where: Warren County, 1.04 mi E of Indianola
Reported by: Mesonet
Coordinates: 41.370, -93.550

Rainfall total for the past 24 hours was 4.75 inches.

Flash Flood, Warren

When: September 10, 2:06 AM CST to 5:15 AM CST
Where: Warren County, 0.52 mi W of Summerset to 2.53 mi S of Scotch Ridge
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $50,000
Reported by: Law Enforcement
Coordinates: 41.430, -93.560

Banner Lakes at Somerset State Park Road north of Indianola at 65/69 closed due to flooding.

Flash Flood, Warren

When: September 10, 2:06 AM CST to 5:15 AM CST
Where: Warren County, 2.07 mi S of Norwalk to 0.9 mi SSW of Norwalk
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $50,000
Reported by: Law Enforcement
Coordinates: 41.450, -93.680

Highway 28 shutdown and portions of S23 closed with water over the road.

Heavy Rain, Cass

When: September 10, 2:40 AM CST
Where: Cass County, 1.25 mi ENE of Atlantic
Reported by: COOP Observer
Coordinates: 41.410, -95.000

Rainfall total for the past 24 hours was 3.12 inches.

Flood, Warren

When: September 10, 2:45 AM CST to 5:45 PM CST
Where: Warren County, 3.69 mi E of Sandyville to 4.96 mi E of Hartford
Cause: Heavy Rain
Property damage: $50,000
Reported by: Official NWS Observations
Coordinates: 41.380, -93.330

Flood, Madison

When: September 10, 2:48 AM CST to 9:00 PM CST
Where: Madison County, 2.14 mi NNE of Barney to 1.06 mi N of Barney
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.200, -94.020

Water remained over the road in the 3100 block of 330th Street.

Flood, Madison

When: September 10, 2:48 AM CST to 9:00 PM CST
Where: Madison County, 3.46 mi SW of Winterset to 4.7 mi WSW of Winterset
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $15,000
Reported by: Law Enforcement
Coordinates: 41.290, -94.060

The 2400 block of Pammel Park Road remained flooded.

Flash Flood, Mahaska

When: September 10, 3:00 AM CST to 5:15 AM CST
Where: Mahaska County, 1.7 mi ESE of Evans to 2.2 mi W of Oskaloosa
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.290, -92.700

Muchakinock Creek was out of its banks 1.5 miles west of Highway 163 on Highway 92. The road was closed.

Flash Flood, Monroe

When: September 10, 3:07 AM CST to 6:00 AM CST
Where: Monroe County, 2.84 mi W of Albia to 0.39 mi WSW of Albia
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.036, -92.874

Water over the road on old Highway 34 and 189th St. with a portion of the road closed.

Heavy Rain, Guthrie

When: September 10, 3:08 AM CST
Where: Guthrie County, Guthrie Center
Reported by: Trained Spotter
Coordinates: 41.680, -94.500

Rainfall of 2.10 inches overnight.

Flash Flood, Clarke

When: September 10, 4:00 AM CST to 5:05 AM CST
Where: Clarke County, 6.84 mi NNW of Murray to 2.15 mi E of Liberty
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.145, -94.009

Several roads washed out and bridges washed out across the county. East Long Creek and Seven Mile Creek remain out of their banks. Residual high water remains on other creeks and streams with standing water in many places. Damage was reported to many road surfaces.

Flash Flood, Lucas

When: September 10, 4:00 AM CST to 5:20 AM CST
Where: Lucas County, Lucas to 1.17 mi S of Lucas
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $25,000
Reported by: Emergency Manager
Coordinates: 41.030, -93.470

Water was reported over many roadways throughout the county with the hardest hit being water over the road on highway 65 south of Lucas.

Flash Flood, Davis

When: September 10, 4:00 AM CST to 6:00 AM CST
Where: Davis County, 4.2 mi WNW of Ash Grove to 4.78 mi SSW of Mark
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Emergency Manager
Coordinates: 40.885, -92.628

Flash flooding was reported in several areas across the county throughout the night with numerous roads affected.

Flash Flood, Appanoose

When: September 10, 4:00 AM CST to 6:00 AM CST
Where: Appanoose County, 4.93 mi SW of Mark to 5.38 mi W of Mark
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Emergency Manager
Coordinates: 40.595, -92.640

Flash flooding was reported in several areas across the county throughout the night with numerous roads affected.

Flood, Wapello

When: September 10, 4:10 AM CST to September 11, 7:00 PM CST
Where: Wapello County, 4.04 mi SSW of Eldon to 2.6 mi W of Eldon
Cause: Heavy Rain
Property damage: $100,000
Reported by: Official NWS Observations
Coordinates: 40.870, -92.210

Flash Flood, Marion

When: September 10, 4:25 AM CST to 5:15 AM CST
Where: Marion County, 1 mi SE of Fifield to 0.82 mi ENE of Red Rock
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.419, -93.017

One foot of water was over the road on Dubuque Dr about one and one half mile west of Highway 163 near Otley.

Heavy Rain, Dallas

When: September 10, 5:00 AM CST
Where: Dallas County, 1.38 mi S of Hadden Hill
Reported by: Public
Coordinates: 41.600, -93.830

Rainfall of 3.1 inches.

Heavy Rain, Taylor

When: September 10, 5:00 AM CST
Where: Taylor County, 1.48 mi SSW of Blockton
Reported by: COOP Observer
Coordinates: 40.600, -94.480

Rainfall total for the past 24 hours was 2.68 inches.

Heavy Rain, Poweshiek

When: September 10, 5:00 AM CST
Where: Poweshiek County, 0.86 mi SW of Chester Center
Reported by: COOP Observer
Coordinates: 41.820, -92.730

Rainfall total for the past 24 hours was 2.25 inches.

Flood, Ringgold

When: September 10, 5:01 AM CST to 4:00 PM CST
Where: Ringgold County, 6.78 mi N of Clearfield to 4.58 mi WSW of Redding
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 40.898, -94.469

Numerous roads remained under water across the county including water over the road on the bridge of P64, a gravel road and water over the road at 210th ave with some damage to the road.

Flood, Clarke

When: September 10, 5:02 AM CST to 4:50 PM CST
Where: Clarke County, 6.84 mi NNW of Murray to 2.16 mi E of Liberty
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.145, -94.009

Several roads remained washed out and bridges washed out across the county. East Long Creek and Seven Mile Creek remained out of their banks. Residual high water remains on other creeks and streams with standing water in many places. Damage was reported to many road surfaces.

Heavy Rain, Jasper

When: September 10, 5:15 AM CST
Where: Jasper County, 1.24 mi SW of Newton
Reported by: Trained Spotter
Coordinates: 41.690, -93.070

Rainfall of 4.40 inches.

Flood, Madison

When: September 10, 5:15 AM CST to 8:00 PM CST
Where: Madison County, 0.69 mi N of Pitzer to 2.43 mi NNE of Pitzer
Cause: Heavy Rain
Property damage: $250,000
Crop damage: $100,000
Reported by: Law Enforcement
Coordinates: 41.380, -94.180

A water rescue took place at 1700 Pitzer road in Madison County. Two vehicles hit a water low spot where the road had been flooded by the North River and it inundated both vehicles at separate times. The drivers of each vehicle had to be rescued and with no injuries reported. One driver was rescued out of a tree while the other was rescued from the top of one of the vehicles.

Flood, Lucas

When: September 10, 5:21 AM CST to 2:00 PM CST
Where: Lucas County, Lucas to 1.18 mi S of Lucas
Cause: Heavy Rain
Property damage: $50,000
Crop damage: $15,000
Reported by: Emergency Manager
Coordinates: 41.030, -93.470

Waters receded through the day with water remaining over highway 65 south of Lucas.

Flood, Mahaska

When: September 10, 5:21 AM CST to 5:00 PM CST
Where: Mahaska County, 1.7 mi ESE of Evans to 2.2 mi W of Oskaloosa
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Emergency Manager
Coordinates: 41.290, -92.700

Muchakinock Creek remained out of its banks 1.5 miles west of Highway 163 on Highway 92. The road was closed.

Flood, Marion

When: September 10, 5:21 AM CST to 5:00 PM CST
Where: Marion County, 1 mi SE of Fifield to 0.82 mi ENE of Red Rock
Cause: Heavy Rain
Property damage: $25,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.419, -93.017

Water remained over over the road on Dubuque Dr about one and one half mile west of Highway 163 near Otley.

Flood, Warren

When: September 10, 5:22 AM CST to 5:10 PM CST
Where: Warren County, 0.81 mi NE of Cumming to 2.34 mi W of New Virginia
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Law Enforcement
Coordinates: 41.488, -93.758

Numerous roads remain underwater across the county.

Heavy Rain, Warren

When: September 10, 5:30 AM CST
Where: Warren County, 1.04 mi W of New Virginia
Reported by: Trained Spotter
Coordinates: 41.180, -93.750

Rainfall of 5.80 inches.

Heavy Rain, Cass

When: September 10, 5:50 AM CST
Where: Cass County, 7.6 mi S of Fletcher Chapel
Reported by: Public
Coordinates: 41.190, -95.000

Rainfall of 3.60 inches.

Heavy Rain, Decatur

When: September 10, 5:53 AM CST
Where: Decatur County, (30i)lamoni Muni Arp
Reported by: ASOS
Coordinates: 40.630, -93.900

Rainfall total for the past 24 hours was 3.93 inches.

Heavy Rain, Polk

When: September 10, 5:54 AM CST
Where: Polk County, 0.52 mi E of (Dsm)des Moines Intl
Reported by: ASOS
Coordinates: 41.530, -93.660

Rainfall total for the past 24 hours was 3.06 inches.

Flood, Monroe

When: September 10, 5:58 AM CST to 5:00 PM CST
Where: Monroe County, 3.3 mi NW of Weller to 6.67 mi SW of Melrose
Cause: Heavy Rain
Property damage: $100,000
Crop damage: $25,000
Reported by: Emergency Manager
Coordinates: 41.155, -93.093

Numerous roads remain underwater across the county.

Heavy Rain, Lucas

When: September 10, 6:00 AM CST
Where: Lucas County, 0.52 mi W of Derby
Reported by: Public
Coordinates: 40.930, -93.460

Rainfall of 4.6 inches.

Heavy Rain, Warren

When: September 10, 6:00 AM CST
Where: Warren County, 0.52 mi E of Bevington
Reported by: Public
Coordinates: 41.370, -93.790

Rainfall of 5.1 inches.

Heavy Rain, Mahaska

When: September 10, 6:00 AM CST
Where: Mahaska County, 1.38 mi N of Oskaloosa
Reported by: COOP Observer
Coordinates: 41.320, -92.650

Rainfall total for the past 24 hours was 5.05 inches.

Heavy Rain, Warren

When: September 10, 6:00 AM CST
Where: Warren County, 1.04 mi E of Indianola
Reported by: COOP Observer
Coordinates: 41.370, -93.550

Rainfall total for the past 24 hours was 4.68 inches.

Heavy Rain, Marion

When: September 10, 6:00 AM CST
Where: Marion County, 3.49 mi N of Pella
Reported by: COOP Observer
Coordinates: 41.470, -92.920

Rainfall total for the past 24 hours was 4.30 inches.

Heavy Rain, Cass

When: September 10, 6:00 AM CST
Where: Cass County, 2.68 mi ESE of Anita Muni Arpt
Reported by: CoCoRaHS
Coordinates: 41.420, -94.720

Rainfall for the past 24 hours was 4.20 inches.

Heavy Rain, Cass

When: September 10, 6:00 AM CST
Where: Cass County, 0.52 mi E of Massena
Reported by: COOP Observer
Coordinates: 41.250, -94.770

Rainfall for the past 24 hours was 4.20 inches.

Heavy Rain, Warren

When: September 10, 6:30 AM CST
Where: Warren County, 1.25 mi WNW of Cool
Reported by: Trained Spotter
Coordinates: 41.190, -93.600

Rainfall of 5.3 inches.

Heavy Rain, Marion

When: September 10, 6:35 AM CST
Where: Marion County, Knoxville
Reported by: Trained Spotter
Coordinates: 41.320, -93.100

Rainfall of 4 inches.

Heavy Rain, Poweshiek

When: September 10, 6:50 AM CST
Where: Poweshiek County, 1.03 mi E of Grinnell
Reported by: Trained Spotter
Coordinates: 41.750, -92.710

Rainfall of 3.5 inches.

Heavy Rain, Warren

When: September 10, 7:00 AM CST
Where: Warren County, 1.04 mi W of Churchville
Reported by: Public
Coordinates: 41.400, -93.790

Rainfall of 5.75 inches.

Heavy Rain, Mahaska

When: September 10, 7:00 AM CST
Where: Mahaska County, 0.86 mi NE of Oskaloosa
Reported by: Public
Coordinates: 41.310, -92.640

Rainfall of 5.5 inches.

Heavy Rain, Adair

When: September 10, 7:00 AM CST
Where: Adair County, 7.58 mi NNE of Howe
Reported by: Public
Coordinates: 41.500, -94.320

Rainfall of 4.5 inches.

Heavy Rain, Warren

When: September 10, 7:00 AM CST
Where: Warren County, 1.7 mi ESE of Hartford
Reported by: CoCoRaHS
Coordinates: 41.460, -93.390

Rainfall total for the past 24 hours was 5.41 inches.

Heavy Rain, Warren

When: September 10, 7:00 AM CST
Where: Warren County, Hartford
Reported by: COOP Observer
Coordinates: 41.470, -93.420

Rainfall total for the past 24 hours was 5.41 inches.

Flood, Union

When: September 10, 7:08 AM CST to 5:57 PM CST
Where: Union County, 3.89 mi WSW of Spaulding to 3.08 mi ENE of Lorimor
Cause: Heavy Rain
Property damage: $200,000
Crop damage: $50,000
Reported by: Law Enforcement
Coordinates: 41.133, -94.451

Numerous rural roads had water over them with some damage to bridge approaches from the water.

Flood, Polk

When: September 10, 7:30 AM CST to September 11, 3:15 AM CST
Where: Polk County, 2.14 mi SSE of Des Moines to 2.14 mi S of Des Moines
Cause: Heavy Rain
Property damage: $150,000
Reported by: Official NWS Observations
Coordinates: 41.570, -93.610

Heavy Rain, Madison

When: September 10, 8:03 AM CST
Where: Madison County, 5.53 mi N of Bevington
Reported by: Mesonet
Coordinates: 41.450, -93.800

Rainfall total for the past 24 hours was 4.46 inches.

Heavy Rain, Marion

When: September 10, 8:28 AM CST
Where: Marion County, 1.04 mi E of Pella
Reported by: Amateur Radio
Coordinates: 41.420, -92.910

Ham radio operator reported 4.06 inches of rain in the past 24 hours.

Heavy Rain, Mahaska

When: September 10, 8:30 AM CST
Where: Mahaska County, 2.81 mi S of Lacey
Reported by: Mesonet
Coordinates: 41.360, -92.660

Rainfall total for the past 24 hours was 5.62 inches.

Heavy Rain, Appanoose

When: September 10, 8:45 AM CST
Where: Appanoose County, 1.73 mi NW of Sedan
Reported by: Mesonet
Coordinates: 40.690, -92.770

Rainfall total for the past 24 hours was 4.33 inches.

Heavy Rain, Polk

When: September 10, 8:52 AM CST
Where: Polk County, 0.69 mi N of Clover Hills
Reported by: NWS Employee
Coordinates: 41.610, -93.750

An NWS employee measured 2.11 inches of rain in the past 24 hours.

Heavy Rain, Wapello

When: September 10, 8:53 AM CST
Where: Wapello County, 2.09 mi NE of Agency
Reported by: Social Media
Coordinates: 41.000, -92.340

Rainfall total for the past 24 hours was 2.50 inches.

Heavy Rain, Warren

When: September 10, 8:59 AM CST
Where: Warren County, 1.04 mi E of Indianola
Reported by: Mesonet
Coordinates: 41.370, -93.550

Rainfall total for the past 24 hours was 4.63 inches.

Heavy Rain, Warren

When: September 10, 9:05 AM CST
Where: Warren County, 0.52 mi W of Indianola
Reported by: Trained Spotter
Coordinates: 41.370, -93.580

Rainfall of 5.25 inches in the past 24 hours.

Heavy Rain, Warren

When: September 10, 9:15 AM CST
Where: Warren County, 2.14 mi SSW of Ackworth
Reported by: Mesonet
Coordinates: 41.340, -93.490

Rainfall total for the past 24 hours was 4.72 inches.

Heavy Rain, Warren

When: September 10, 9:15 AM CST
Where: Warren County, 2.18 mi WSW of Summerset
Reported by: Mesonet
Coordinates: 41.420, -93.590

Rainfall total for the past 24 hours was 4.35 inches.

Flood, Warren

When: September 11, 7:00 PM CST to September 12, 8:45 PM CST
Where: Warren County, 2.32 mi NNW of Churchville to 3.45 mi W of Conger
Cause: Heavy Rain
Property damage: $100,000
Reported by: Official NWS Observations
Coordinates: 41.430, -93.790

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Iowa in 2014 Every state in 2014 This day in weather history Warnings in Iowa, September 2014

Sources

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: 543270, 543271, 533150, 533154, 533153, 533151, 533152, 533155, 533157, 533307, 533156, 533158, 533160, 533159, 543289, 533161, 533167, 533308, 533162, 533163, 533171, 533357, 533164, 533165, 533166, 533169, 533170, 533172, 533178, 533177, 533173, 533174, 543273, 543274, 543292, 543294, 533175, 533176, 533179, 533180, and more.