Alert archive / Iowa / Flash Flood Warnings in 2011

Flash Flood Warning 13, NWS Des Moines, IA

June 9, 20115 counties in Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 9, 2011, 11:36 PM CDT for 5 counties in Iowa. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 9, 2011, 11:36 PM CDT (04:36 UTC)
Expired: Jun 10, 2011, 3:10 AM CDT
In force: 4 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Adair County, IA, Audubon County, IA, Dallas County, IA, Guthrie County, IA, Madison County, IA

The radar

The Des Moines radar (KDMX), 48 km from the middle of the area, began a volume at 04:36 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.6 hours before the alert went out and 177 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 151 J/kg
Mixed-layer CIN: -389 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 426 m²/s²
0-3 km storm-relative helicity: 608 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 14.0

Open this sounding in Storm Lab

The text

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

748 
WGUS53 KDMX 100436
FFWDMX
IAC001-009-049-077-121-101030-
/O.NEW.KDMX.FF.W.0013.110610T0436Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1136 PM CDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DALLAS COUNTY IN CENTRAL IOWA...
  GUTHRIE COUNTY IN WEST CENTRAL IOWA...
  NORTHEASTERN AUDUBON COUNTY IN WEST CENTRAL IOWA...
  NORTHERN ADAIR COUNTY IN SOUTHWEST IOWA...
  NORTHERN MADISON COUNTY IN SOUTH CENTRAL IOWA...

* UNTIL 530 AM CDT

* AT 1135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SLOW MOVING THUNDERSTORMS WITH VERY HIGH RAINFALL RATES ACROSS THE 
WARNED AREA. AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ADEL...DALLAS CENTER...DE SOTO...EARLHAM...GREENFIELD...GUTHRIE
  CENTER...PANORA...PERRY...STUART...WAUKEE...WINTERSET AND WOODWARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 4186 9382 4182 9382 4181 9386 4126 9386
      4127 9458 4148 9470 4150 9470 4151 9472
      4186 9493

$$

BEITLICH

4 follow-up statements

178 
WGUS73 KDMX 100538
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1238 AM CDT FRI JUN 10 2011

IAC001-009-049-077-121-101030-
/O.CON.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-GUTHRIE IA-ADAIR IA-AUDUBON IA-DALLAS IA-
1238 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR DALLAS...NORTHEASTERN
AUDUBON...NORTHERN ADAIR...GUTHRIE AND NORTHERN MADISON COUNTIES
UNTIL 530 AM CDT...

AT 1237 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SCATTERED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED 
AREA. AN ADDITIONAL INCH OF RAIN IS POSSIBLE.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...
ADEL...DALLAS CENTER...DE SOTO...EARLHAM...GREENFIELD...GUTHRIE 
CENTER...PANORA...PERRY...STUART...WAUKEE...WINTERSET...WOODWARD...
SPRING BROOK STATE PARK...AND LOW WATER CROSSINGS ALONG THE MIDDLE 
RIVER.

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 4186 9382 4182 9382 4181 9386 4126 9386
      4127 9458 4148 9470 4150 9470 4151 9472
      4186 9493

$$

BEITLICH

175 
WGUS73 KDMX 100658
FFSDMX

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

IAC009-077-100713-
/O.CAN.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUTHRIE IA-AUDUBON IA-
158 AM CDT FRI JUN 10 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN
AUDUBON AND GUTHRIE COUNTIES IS CANCELLED...

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 4128 9459 4148 9427 4150 9427 4151 9424
      4160 9424 4160 9426 4186 9425 4186 9382
      4182 9382 4181 9386 4126 9386

$$

IAC001-049-121-101030-
/O.CON.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-ADAIR IA-DALLAS IA-
158 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR DALLAS...NORTHERN ADAIR
AND NORTHERN MADISON COUNTIES UNTIL 530 AM CDT...

AT 158 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. AN 
ADDITIONAL INCH OF RAINFALL IS POSSIBLE.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH  FLOODING INCLUDE...
ADEL...DALLAS CENTER...DE SOTO...EARLHAM...GREENFIELD...PERRY...
WAUKEE...WINTERSET AND WOODWARD.

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 4128 9459 4148 9427 4150 9427 4151 9424
      4160 9424 4160 9426 4186 9425 4186 9382
      4182 9382 4181 9386 4126 9386

$$

BEITLICH

088 
WGUS73 KDMX 100743
FFSDMX

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

IAC001-049-100756-
/O.CAN.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAIR IA-DALLAS IA-
243 AM CDT FRI JUN 10 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR DALLAS AND NORTHERN
ADAIR COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS MAY IN THE WARNED AREA MAY STILL BE HIGH...BUT 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 4127 9415 4151 9396 4150 9386 4137 9386
      4126 9386

$$

IAC121-101030-
/O.CON.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-
243 AM CDT FRI JUN 10 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL MADISON COUNTY
UNTIL 530 AM CDT...

AT 241 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. AN 
ESTIMATED 2 TO 4 INCHES HAVE FALLEN.

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

IN ADDITION...AT 237 AM CDT...SEWERS WERE BACKING UP IN THE TOWN OF 
WINTERSET.

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 4127 9415 4151 9396 4150 9386 4137 9386
      4126 9386

$$

BEITLICH

603 
WGUS73 KDMX 100810
FFSDMX

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

IAC121-100826-
/O.CAN.KDMX.FF.W.0013.000000T0000Z-110610T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-
310 AM CDT FRI JUN 10 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL MADISON
COUNTY IS CANCELLED...

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 4127 9415 4151 9396 4150 9386 4137 9386
      4126 9386

$$

BEITLICH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:10 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Winnebago, Wright	50 min
Jun 9, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Worth	37 min
Jun 9, 8:07 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 9, 8:13 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Jasper, Polk, Story, Warren	47 min
Jun 9, 8:33 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	26 min
Jun 9, 8:37 PM CDT	Flash Flood Warning	DMX	Dallas, Madison, Polk, Warren	6 hr
Jun 9, 8:37 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Webster	38 min
Jun 9, 8:39 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	21 min
Jun 9, 8:47 PM CDT	Severe Thunderstorm Warning	DMX	Story	43 min
Jun 9, 8:55 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	50 min
Jun 9, 8:58 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Story	47 min
Jun 9, 9:02 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Story	28 min
Jun 9, 9:11 PM CDT	Severe Thunderstorm Warning	DMX	Polk	34 min
Jun 9, 9:15 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Hardin, Story	20 min
Jun 9, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Polk, Story	22 min
Jun 9, 9:30 PM CDT	Flash Flood Warning	DMX	Boone, Polk, Story	4 hr
Jun 9, 10:04 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	41 min
Jun 9, 10:29 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	31 min
Jun 9, 10:34 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	26 min
Jun 9, 10:45 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk	31 min
Jun 9, 10:49 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion	41 min
Jun 9, 10:56 PM CDT	Severe Thunderstorm Warning	DMX	Madison, Warren	34 min
Jun 9, 11:11 PM CDT	Flash Flood Warning	DMX	Jasper, Madison, Marion, Warren	6 hr
Jun 9, 11:14 PM CDT	High Wind Warning	DMX	Marshall, Tama	106 min
Jun 9, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass	46 min
Jun 10, 12:07 AM CDT	River Flood Warning	DMX	Polk	6 hr
Jun 10, 1:59 AM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Union	46 min
Jun 10, 2:21 AM CDT	Flash Flood Warning	DMX	Mahaska, Marion, Monroe	6 hr
Jun 10, 5:05 AM CDT	Areal Flood Warning	DMX	Marion, Warren	24 hr
Jun 10, 7:20 AM CDT	River Flood Warning	DMX	Polk	20 hr
Jun 10, 7:20 AM CDT	River Flood Warning	DMX	Polk	20 hr
Jun 10, 8:29 AM CDT	Areal Flood Warning	DMX	Mahaska, Marion	24 hr

Nearby

Flash Flood Warnings in Iowa, 2011 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.