Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 28, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 26, 2011, 5:40 PM CDT for Clarke County, Lucas County, Iowa. It was in force for 6 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 26, 2011, 5:40 PM CDT (22:40 UTC)
- Expired
- Jun 26, 2011, 11:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clarke County, IA, Lucas County, IA
The radar
The Des Moines radar (KDMX), 74 km from the middle of the area, began a volume at 22:39 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 12:00Z, 10.7 hours before the alert went out and 229 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 859 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
119 WGUS53 KDMX 262240 FFWDMX IAC039-117-270430- /O.NEW.KDMX.FF.W.0028.110626T2240Z-110627T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 540 PM CDT SUN JUN 26 2011 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... CLARKE COUNTY IN SOUTH CENTRAL IOWA... LUCAS COUNTY IN SOUTH CENTRAL IOWA... * UNTIL 1130 PM CDT * AT 540 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. DOPPLER RADAR HAD ESTIMATED AROUND 2 INCHES OF RAINFALL IN THE PAST HOUR WITH ADDITIONAL HEAVY RAINFALL EXPECTED. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... CHARITON AND OSCEOLA. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. && LAT...LON 4115 9401 4116 9310 4094 9310 4095 9402 $$ COGIL
4 follow-up statements
349 WGUS73 KDMX 262358 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 658 PM CDT SUN JUN 26 2011 IAC039-117-270430- /O.CON.KDMX.FF.W.0028.000000T0000Z-110627T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LUCAS IA-CLARKE IA- 658 PM CDT SUN JUN 26 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CLARKE AND LUCAS COUNTIES UNTIL 1130 PM CDT... AT 655 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES BETWEEN 2 AND 4 INCHES OF RAINFALL NORTH OF HIGHWAY 34 IN CLARKE COUNTY. ADDITIONAL HEAVY RAINFALL HAS BEEN MORE SPOTTY AROUND CLARKE AND LUCAS COUNTIES. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... CHARITON AND OSCEOLA. AT 645 PM CDT...CLARKE COUNTY DISPATCH INDICATED THAT WATER FROM WHITE BREAST CREEK JUST SOUTH OF OSCEOLA WAS ENCROACHING UPON HIGHWAY 69. THE WATER WAS FROM 5 TO 6 INCHES DEEP ACROSS THE ROADWAY. ADDITIONAL RUNOFF FROM THE THUNDERSTORMS WILL CONTINUE TO PRODUCE FLOODED ROADWAYS IN LUCAS AND CLARKE COUNTY THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND...DONT DROWN. && LAT...LON 4115 9401 4116 9310 4094 9310 4095 9402 $$ COGIL
390 WGUS73 KDMX 270056 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 756 PM CDT SUN JUN 26 2011 IAC039-117-270430- /O.CON.KDMX.FF.W.0028.000000T0000Z-110627T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LUCAS IA-CLARKE IA- 756 PM CDT SUN JUN 26 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CLARKE AND LUCAS COUNTIES UNTIL 1130 PM CDT... AT 756 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT FLASH FLOODING WAS OCCURRING IN NORTHERN LUCAS COUNTY. ADDITIONAL HEAVY RAINFALL IS EXPECTED IN THE AREA AFTER 930 PM WHICH WILL RENEW AND WORSEN ANY EXISTING FLOODING. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... CHARITON AND OSCEOLA. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4115 9401 4116 9310 4094 9310 4095 9402 $$
370 WGUS73 KDMX 270221 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 921 PM CDT SUN JUN 26 2011 IAC039-117-270430- /O.CON.KDMX.FF.W.0028.000000T0000Z-110627T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LUCAS IA-CLARKE IA- 921 PM CDT SUN JUN 26 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CLARKE AND LUCAS COUNTIES UNTIL 1130 PM CDT... AT 920 PM CDT...ALTHOUGH THE RAIN HAD ENDED...ADDITIONAL THUNDERSTORMS WITH ADDITIONAL HEAVY RAINFALL WERE APPROACHING THE WARNED AREA. THIS ADDITIONAL RAINFALL WILL LEAD TO EITHER WORSE OR PROLONGED FLOODING. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE... CHARITON AND OSCEOLA. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 4115 9401 4116 9310 4094 9310 4095 9402 $$ ZOGG
836 WGUS73 KDMX 270427 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1127 PM CDT SUN JUN 26 2011 IAC039-117-270442- /O.EXP.KDMX.FF.W.0028.000000T0000Z-110627T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LUCAS IA-CLARKE IA- 1127 PM CDT SUN JUN 26 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CLARKE AND LUCAS COUNTIES WILL BE ALLOWED TO EXPIRE AT 1130 PM CDT... 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 4115 9401 4116 9310 4094 9310 4095 9402 $$ ZOGG
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 3:42 PM CDT | Flash Flood Watch | DMX | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 23 more | 14 hr |
| Jun 26, 4:20 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Union | 55 min |
| Jun 26, 4:46 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Union | 44 min |
| Jun 26, 4:57 PM CDT | Flash Flood Warning | DMX | Adair, Adams, Madison, Union | 6 hr |
| Jun 26, 5:47 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Monroe | 43 min |
| Jun 26, 6:07 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 38 min |
| Jun 26, 6:20 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 40 min |
| Jun 26, 6:33 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 42 min |
| Jun 26, 6:36 PM CDT | River Flood Warning | DMX | Lucas, Wayne | 34 hr |
| Jun 26, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 51 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.