Alert archive / Iowa / Flash Flood Warnings in 2011

Flash Flood Warning 14, NWS Des Moines, IA

June 10, 2011Mahaska County, Marion County, Monroe County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 10, 2011, 2:21 AM CDT for Mahaska County, Marion County, Monroe County, Iowa. It was in force for 6 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 10, 2011, 2:21 AM CDT (07:21 UTC)
Expired
Jun 10, 2011, 8:30 AM CDT
In force
6 hr
Issued by
NWS Des Moines, IA
Area
Storm-based polygon
Flood severity
None

Counties Mahaska County, IA, Marion County, IA, Monroe County, IA

The radar

The Des Moines radar (KDMX), 87 km from the middle of the area, began a volume at 07:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 10, 4:32 AM CDTFLASH FLOOD4 Ne Pella Airport, IATHUNDER CREEK OVER 240TH STREET. ROAD CLOSED. DEPUTY REPORTED IT LOOKED LIKE WHITE WATER RAPIDS.
Jun 10, 6:45 AM CDTFLOOD3 W Oskaloosa, IAHIGHWAY 92 CLOSED DUE TO HIGH WATER BETWEEN COUNTY HIGHWAY T25 AND HIGHWAY 163.
Jun 10, 7:04 AM CDTHEAVY RAIN 4.772 Se Pella Airport, IA24 HOUR TOTAL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.4 hours before the alert went out and 202 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Davenport, at 00:00Z on 2011-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2011-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

891 
WGUS53 KDMX 100721
FFWDMX
IAC123-125-135-101330-
/O.NEW.KDMX.FF.W.0014.110610T0721Z-110610T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
221 AM CDT FRI JUN 10 2011

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME NORTHERN MONROE COUNTY IN SOUTH CENTRAL IOWA...
  MAHASKA COUNTY IN SOUTH CENTRAL IOWA...
  SOUTHEASTERN MARION COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 830 AM CDT

* AT 220 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. 2 INCHES HAVE FALLEN OVER THE PAST COUPLE OF H        
  OURS...AND AN ADDITIONAL INCH IS POSSIBLE.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  OSKALOOSA AND PELLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4116 9264 4115 9264 4115 9310 4116 9310
      4116 9333 4128 9333 4128 9313 4144 9293
      4151 9293 4151 9286 4135 9241 4116 9241

$$

BEITLICH
4 follow-up statements
074 
WGUS73 KDMX 100824
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
324 AM CDT FRI JUN 10 2011

IAC123-125-135-101330-
/O.CON.KDMX.FF.W.0014.000000T0000Z-110610T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IA-MARION IA-MAHASKA IA-
324 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MAHASKA...SOUTHEASTERN
MARION AND EXTREME NORTHERN MONROE COUNTIES UNTIL 830 AM CDT...

AT 322 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. AN 
ESTIMATED 3 TO 4 INCHES OF RAIN HAVE ALREADY FALLEN...AND ANOTHER 1 
TO 2 INCHES IS POSSIBLE.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...
OSKALOOSA AND PELLA.

AT 323 AM CDT...EMERGENCY MANAGERS REPORTED SEVERAL GRAVEL ROADS 
CLOSED DUE TO FLASH FLOODING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4116 9264 4115 9264 4115 9310 4116 9310
      4116 9333 4128 9333 4128 9313 4144 9293
      4151 9293 4151 9286 4135 9241 4116 9241

$$

BEITLICH
673 
WGUS73 KDMX 100939
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
439 AM CDT FRI JUN 10 2011

IAC123-125-135-101330-
/O.CON.KDMX.FF.W.0014.000000T0000Z-110610T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IA-MARION IA-MAHASKA IA-
439 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MAHASKA...SOUTHEASTERN
MARION AND EXTREME NORTHERN MONROE COUNTIES UNTIL 830 AM CDT...

AT 438 AM CDT...EMERGENCY MANAGEMENT REPORTED THAT FLASH FLOODING WAS
OCCURRING NEAR PELLA.  THUNDER CREEK WAS OVER 240TH STREET...FLOWING 
QUICKLY...AND RESEMBLING WHITE WATER RAPIDS.

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...OSKALOOSA AND PELLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS... AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4116 9264 4115 9264 4115 9310 4116 9310
      4116 9333 4128 9333 4128 9313 4144 9293
      4151 9293 4151 9286 4135 9241 4116 9241

$$

SMALL
252 
WGUS73 KDMX 101145
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
645 AM CDT FRI JUN 10 2011

IAC123-125-135-101330-
/O.CON.KDMX.FF.W.0014.000000T0000Z-110610T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IA-MARION IA-MAHASKA IA-
645 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR MAHASKA...SOUTHEASTERN
MARION AND EXTREME NORTHERN MONROE COUNTIES UNTIL 830 AM CDT...

AT 645 AM CDT...THE IOWA DEPARTMENT OF TRANSPORTATION REPORTED THAT 
HIGHWAY 92 WAS CLOSED DUE TO FLOOD WATERS FROM COUNTY ROAD T25 TO 
HIGHWAY 163 NEAR BEACON.

SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING 
INCLUDE...OSKALOOSA AND PELLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS... AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE
WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN
AROUND...DONT DROWN.

&&

LAT...LON 4116 9264 4115 9264 4115 9310 4116 9310
      4116 9333 4128 9333 4128 9313 4144 9293
      4151 9293 4151 9286 4135 9241 4116 9241

$$

SMALL
758 
WGUS73 KDMX 101332
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
832 AM CDT FRI JUN 10 2011

IAC123-125-135-101346-
/O.EXP.KDMX.FF.W.0014.000000T0000Z-110610T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONROE IA-MARION IA-MAHASKA IA-
832 AM CDT FRI JUN 10 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR MAHASKA...
SOUTHEASTERN MARION AND EXTREME NORTHERN MONROE COUNTIES HAS BEEN
ALLOWED TO EXPIRE...

THE FLASH FLOOD WARNING HAS BEEN REPLACED BY AN AREAL FLOOD WARNING 
FOR MAHASKA AND SOUTHEASTERN MARION COUNTIES. LOCAL LAW ENFORCEMENT 
REPORTS THAT NUMEROUS COUNTY ROADS REMAIN CLOSED DUE TO WATER OVER 
THE ROAD. IT WILL TAKE TIME FOR FLOOD WATERS TO RECEDE TODAY.

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4116 9264 4115 9264 4115 9310 4116 9310
      4116 9333 4128 9333 4128 9313 4144 9293
      4151 9293 4151 9286 4135 9241 4116 9241

$$

LEE

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 9, 7:10 PM CDTSevere Thunderstorm WarningDMXHancock, Humboldt, Kossuth, Winnebago, Wright50 min
Jun 9, 7:41 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Worth37 min
Jun 9, 8:07 PM CDTSevere Thunderstorm WarningDMXCalhoun, Carroll, Greene, Webster41 min
Jun 9, 8:13 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas, Jasper, Polk, Story, Warren47 min
Jun 9, 8:33 PM CDTSevere Thunderstorm WarningDMXCerro Gordo, Franklin, Hancock, Wright26 min
Jun 9, 8:37 PM CDTFlash Flood WarningDMXDallas, Madison, Polk, Warren6 hr
Jun 9, 8:37 PM CDTSevere Thunderstorm WarningDMXBoone, Greene, Webster38 min
Jun 9, 8:39 PM CDTSevere Thunderstorm WarningDMXBoone, Greene21 min
Jun 9, 8:47 PM CDTSevere Thunderstorm WarningDMXStory43 min
Jun 9, 8:55 PM CDTSevere Thunderstorm WarningDMXJasper, Polk50 min
Jun 9, 8:58 PM CDTSevere Thunderstorm WarningDMXJasper, Marshall, Story47 min
Jun 9, 9:02 PM CDTSevere Thunderstorm WarningDMXBoone, Story28 min
Jun 9, 9:11 PM CDTSevere Thunderstorm WarningDMXPolk34 min
Jun 9, 9:15 PM CDTSevere Thunderstorm WarningDMXHamilton, Hardin, Story20 min
Jun 9, 9:26 PM CDTSevere Thunderstorm WarningDMXBoone, Polk, Story22 min
Jun 9, 9:30 PM CDTFlash Flood WarningDMXBoone, Polk, Story4 hr
Jun 9, 10:04 PM CDTSevere Thunderstorm WarningDMXJasper, Marion, Polk, Warren41 min
Jun 9, 10:29 PM CDTSevere Thunderstorm WarningDMXAdams, Taylor31 min
Jun 9, 10:34 PM CDTSevere Thunderstorm WarningDMXPolk, Warren26 min
Jun 9, 10:45 PM CDTSevere Thunderstorm WarningDMXDallas, Polk31 min
Jun 9, 10:49 PM CDTSevere Thunderstorm WarningDMXJasper, Mahaska, Marion41 min
Jun 9, 10:56 PM CDTSevere Thunderstorm WarningDMXMadison, Warren34 min
Jun 9, 11:11 PM CDTFlash Flood WarningDMXJasper, Madison, Marion, Warren6 hr
Jun 9, 11:14 PM CDTHigh Wind WarningDMXMarshall, Tama106 min
Jun 9, 11:14 PM CDTSevere Thunderstorm WarningDMXAdair, Audubon, Cass46 min
Jun 9, 11:36 PM CDTFlash Flood WarningDMXAdair, Audubon, Dallas, Guthrie, Madison4 hr
Jun 10, 12:07 AM CDTRiver Flood WarningDMXPolk6 hr
Jun 10, 1:59 AM CDTSevere Thunderstorm WarningDMXAdams, Ringgold, Union46 min
Jun 10, 5:05 AM CDTAreal Flood WarningDMXMarion, Warren24 hr
Jun 10, 7:20 AM CDTRiver Flood WarningDMXPolk20 hr
Jun 10, 7:20 AM CDTRiver Flood WarningDMXPolk20 hr
Jun 10, 8:29 AM CDTAreal Flood WarningDMXMahaska, Marion24 hr

Nearby

Flash Flood Warnings in Iowa, 2011Every flash flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.