Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 24, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 25, 2011, 5:51 AM CDT for Adams County, Cass County, Union County, Iowa. It was in force for 6 hr. 4 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 25, 2011, 5:51 AM CDT (10:51 UTC)
- Expired
- Jun 25, 2011, 12:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adams County, IA, Cass County, IA, Union County, IA
The radar
The Des Moines radar (KDMX), 110 km from the middle of the area, began a volume at 10:52 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 25, 8:13 AM CDT | FLASH FLOOD | Creston, IA | SEVERAL ROAD INTERSECTIONS IMPASSABLE WITHIN CRESTON CITY LIMITS DUE TO FAST MOVING WATER. |
| Jun 25, 10:22 AM CDT | FLASH FLOOD | 4 Nw Cromwell, IA | 6 TO 8 INCHES OF WATER FLOWING OVER ROAD AT UNION AVE JUST SOUTH OF 15OTH ST. ALSO OCCURRING AT VANILLA AVE AND 150TH ST. |
| Jun 25, 10:55 AM CDT | FLASH FLOOD | 16 E Creston, IA | 160TH. ST. CLOSED DUE TO WATER OVER ROADWAY. |
| Jun 25, 10:55 AM CDT | FLASH FLOOD | 1 E Lorimor, IA | 120TH. STREET EAST OF LORIMOR CLOSED DUE TO WATER OVER ROADWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 10.9 hours before the alert went out and 140 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
- 1910 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
424
WGUS53 KDMX 251051
FFWDMX
IAC003-029-175-251700-
/O.NEW.KDMX.FF.W.0024.110625T1051Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
551 AM CDT SAT JUN 25 2011
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
ADAMS COUNTY IN SOUTHWEST IOWA...
SOUTHERN CASS COUNTY IN SOUTHWEST IOWA...
UNION COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL NOON CDT
* AT 551 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RADAR ESTIMATES OF 1 TO 3 INCHES OF RAIN HAS FALLEN IN
PARTS OF THE WARNING AREA...WITH ADDITIONAL THUNDERSTORMS MOVING
INTO THE AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CRESTON...CORNING AND GRISWOLD.
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. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. TURN AROUND...DONT DROWN.
&&
LAT...LON 4096 9493 4115 9494 4115 9515 4127 9516
4116 9469 4116 9401 4091 9402
$$6 follow-up statements
887
WGUS73 KDMX 251200
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
700 AM CDT SAT JUN 25 2011
IAC003-029-175-251700-
/O.CON.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-CASS IA-
700 AM CDT SAT JUN 25 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN CASS...ADAMS
AND UNION COUNTIES UNTIL NOON CDT...
AT 656 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA.
DOPPLER RADAR ESTIMATES OF 1 TO 4 INCHES OF RAIN HAS FALLEN ACROSS
THE WARNED AREA. AN ADDITIONAL INCH IS POSSIBLE IN THE NEXT 2 HOURS.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CRESTON...CORNING AND GRISWOLD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE MINOR FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS... AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE
WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN
AROUND...DONT DROWN.
&&
LAT...LON 4096 9493 4115 9494 4115 9515 4127 9516
4116 9469 4116 9401 4091 9402
$$336
WGUS73 KDMX 251246
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
746 AM CDT SAT JUN 25 2011
IAC003-029-175-251700-
/O.CON.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-CASS IA-
746 AM CDT SAT JUN 25 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN CASS...ADAMS
AND UNION COUNTIES UNTIL NOON CDT...
AT 744 AM CDT...EMERGENCY MANAGEMENT REPORTED THUNDERSTORMS WITH VERY
HEAVY RAINFALL ACROSS THE WARNED AREA. FIELD FLOODING WAS EXTENSIVE
ACROSS NORTH CENTRAL AND NORTHEAST ADAMS COUNTY. DOPPLER RADAR
INDICATED RAINFALL OF 3 TO 5 INCHES IN THAT AREA. ELSEWHERE OVER
ADAMS AND UNION COUNTY...RAINFALL ESTIMATES WERE IN THE 1 TO 3 INCH
RANGE.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CRESTON...CORNING AND GRISWOLD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE ALSO SUBJECT TO FLOODING.
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 4096 9493 4115 9494 4115 9515 4127 9516
4116 9469 4116 9401 4091 9402
$$217
WGUS73 KDMX 251332
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
832 AM CDT SAT JUN 25 2011
IAC029-251341-
/O.CAN.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS IA-
832 AM CDT SAT JUN 25 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN CASS
COUNTY IS CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4096 9493 4115 9494 4116 9440 4115 9401
4091 9402
$$
IAC003-175-251700-
/O.CON.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-
832 AM CDT SAT JUN 25 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ADAMS AND UNION COUNTIES
UNTIL NOON CDT...
AT 826 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT FLASH
FLOODING WAS OCCURRING IN CRESTON AT LOW WATER CROSSINGS IN TOWN.
SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLASH FLOODING
INCLUDE...PARTS OF THE EAST NODAWAY RIVER ESPECIALLY COUNTY ROAD AND
FOUR MILE CREEK SOUTH OF THAYER IN UNION COUNTY. THERE ARE SEVERAL
ROADS IN SOUTH OF THAYER THAT ARE VULNERABLE TO FLASH FLOODING ALONG
FOUR MILE CREEK.
THE HEAVY RAIN PRODUCING THUNDERSTORMS HAD MOVED INTO SOUTHEAST IOWA
AND OUT OF THE WARNED AREA BY 830 AM. ADDITIONAL HEAVY RAINFALL IS
NOT EXPECTED THIS MORNING SO FLOOD CONDITIONS SHOULD SLOWLY IMPROVE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE ALSO SUBJECT TO FLOODING.
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 4096 9493 4115 9494 4116 9440 4115 9401
4091 9402
$$570
WGUS73 KDMX 251437
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
937 AM CDT SAT JUN 25 2011
IAC003-175-251700-
/O.CON.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-
937 AM CDT SAT JUN 25 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ADAMS AND UNION COUNTIES
UNTIL NOON CDT...
AT 930 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE HEAVY RAINFALL HAD ENDED OVER THE WARNED AREA.
RUNOFF FROM EXCESSIVE RAINFALL THIS MORNING WILL CONTINUE TO RESULT
IN FLASH FLOODING...BUT CONDITIONS WILL IMPROVE LATE THIS MORNING.
AREAS WHICH HAVE HAD FLASH FLOODING OR ARE VULNURABLE TO FLASH
FLOODING INCLUDE...PARTS OF THE EAST NODAWAY RIVER ESPECIALLY COUNTY
ROAD AND FOUR MILE CREEK SOUTH OF THAYER IN UNION COUNTY. THERE ARE
SEVERAL ROADS IN SOUTH OF THAYER THAT ARE VULNERABLE TO FLASH
FLOODING ALONG FOUR MILE CREEK. URBAN FLOODING IN CRESTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR AND THE
WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. TURN
AROUND...DONT DROWN.
&&
LAT...LON 4096 9493 4115 9494 4116 9440 4115 9401
4091 9402
$$046
WGUS73 KDMX 251611
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1111 AM CDT SAT JUN 25 2011
IAC003-175-251700-
/O.CON.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-
1111 AM CDT SAT JUN 25 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ADAMS AND UNION COUNTIES
UNTIL NOON CDT...
AT 1100 AM CDT...THE HEAVY RAINFALL HAD ENDED IN THE WARNED AREA AND
NO ADDITIONAL RAINFALL IS EXPECTED. RUNOFF FROM THE HEAVY RAIN
EARLY THIS MORNING WILL CONTINUE TO CAUSE FLASH FLOOD BUT CONDITIONS
SHOULD SLOWLY IMPROVE THROUGH THE NOON HOUR.
EMERGENCY MANAGEMENT REPORTED THAT NUMEROUS COUNTY ROADS WERE CLOSED
DUE TO FLASH FLOODING IN BOTH UNION AND NORTHEAST ADAMS COUNTIES.
AREAS WHICH HAVE HAD FLASH FLOODING OR ARE VULNERABLE TO FLASH
FLOODING INCLUDE...PARTS OF THE EAST NODAWAY RIVER ESPECIALLY COUNTY
ROAD AND FOUR MILE CREEK SOUTH OF THAYER IN UNION COUNTY. THERE ARE
SEVERAL ROADS IN SOUTH OF THAYER THAT ARE VULNERABLE TO FLASH
FLOODING ALONG FOUR MILE CREEK. URBAN FLOODING IN CRESTON
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE ALSO SUBJECT TO FLOODING.
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 4096 9493 4115 9494 4116 9440 4115 9401
4091 9402
$$987
WGUS73 KDMX 251656
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1156 AM CDT SAT JUN 25 2011
IAC003-175-251710-
/O.EXP.KDMX.FF.W.0024.000000T0000Z-110625T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
UNION IA-ADAMS IA-
1156 AM CDT SAT JUN 25 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR ADAMS AND UNION
COUNTIES WILL BE ALLOWED TO EXPIRE AT NOON CDT...
NO ADDITIONAL HEAVY RAINFALL IS FORECAST THIS AFTERNOON IN
SOUTHWEST IOWA.
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED...OR WILL BE ENDING SOON...
OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE
RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. IF
FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW
ENFORCEMENT AGENCY.
LAT...LON 4096 9493 4115 9494 4116 9440 4115 9401
4091 9402
$$
JOHNSONThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 5:07 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Union | 38 min |
| Jun 25, 5:44 AM CDT | Severe Thunderstorm Warning | DMX | Clarke | 30 min |
| Jun 25, 7:23 AM CDT | Flash Flood Warning | DMX | Clarke | 6 hr |
| Jun 25, 9:11 AM CDT | Flash Flood Warning | DMX | Appanoose, Wayne | 4 hr |
| Jun 25, 11:30 AM CDT | River Flood Warning | DMX | Decatur | 21 hr |
| Jun 25, 11:30 AM CDT | River Flood Warning | DMX | Appanoose, Wayne | 29 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.