Alert archive / Iowa / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Feb 19, 2011, 3:43 AM CST for Webster 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
- Feb 19, 2011, 3:43 AM CST (09:43 UTC)
- Expired
- Feb 19, 2011, 9:30 AM CST
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Webster County, IA
The radar
The Des Moines radar (KDMX), 92 km from the middle of the area, began a volume at 09:45 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, 9.7 hours before the alert went out and 225 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
- 2198 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
822
WGUS53 KDMX 190943
FFWDMX
IAC187-191530-
/O.NEW.KDMX.FF.W.0002.110219T0943Z-110219T1530Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
343 AM CST SAT FEB 19 2011
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR ICE JAM FLOODING ALONG THE DES MOINES
RIVER IN...
CENTRAL WEBSTER COUNTY IN CENTRAL IOWA...
* UNTIL 930 AM CST
* AT 339 AM CST...AN ICE JAM WAS REPORTED ALONG THE DES MOINES RIVER
IN FORT DODGE AND WAS CAUSING RAPID RISES UPSTREAM OF THE JAM. THIS
JAM COULD CAUSE THE DES MOINES RIVER TO RISE NEARLY 2 FEET ABOVE
FLOOD STAGE OVER A SHORT PERIOD OF TIME.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...FORT DODGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG THE DES MOINES RIVER THAT TYPICALLY HAVE
FLOODING PROBLEMS DUE TO ICE JAMS SHOULD TAKE ACTION NOW.
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4257 9419 4248 9415 4242 9404 4241 9412
4246 9420 4256 9424
$$
DONAVON4 follow-up statements
630
WGUS73 KDMX 191151
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
551 AM CST SAT FEB 19 2011
IAC187-191530-
/O.CON.KDMX.FF.W.0002.000000T0000Z-110219T1530Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
551 AM CST SAT FEB 19 2011
...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT ALONG
THE DES MOINES RIVER IN CENTRAL WEBSTER COUNTY UNTIL 930 AM CST...
AT 546 AM CST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT THE
DES MOINES RIVER WAS BEGINNING TO FLOW IN FORT DODGE THOUGH IS
POSSIBLY STILL ICED OVER SOUTH OF TOWN. ADDITIONAL JAMS REMAIN
POSSIBLE AS THIS ICE FLOW MOVES SOUTH. AT 5 AM...THE RIVER STAGE IN
FORT DODGE WAS 12.1 FT WHICH IS AN INCREASE OVER THE 2 AM STAGE OF
8.4 FT. FLOOD STAGE IS 10.5 FT. THE WATER IS EXPECTED TO DROP BELOW
FLOOD STAGE ONCE THE ICE JAM RELEASES DOWN STREAM.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...FORT
DODGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4257 9419 4248 9415 4242 9404 4241 9412
4246 9420 4256 9424
$$
DONAVON574
WGUS73 KDMX 191327
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
727 AM CST SAT FEB 19 2011
IAC187-191530-
/O.CON.KDMX.FF.W.0002.000000T0000Z-110219T1530Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
727 AM CST SAT FEB 19 2011
...FLASH FLOOD WARNING FOR ICE JAM FLOODING ALONG THE DES MOINES
RIVER REMAINS IN EFFECT FOR CENTRAL WEBSTER COUNTY UNTIL 930 AM
CST...
AT 724 AM CST...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT THE
DES MOINES RIVER WAS BEGINNING TO FLOW IN FORT DODGE THOUGH IS
POSSIBLY STILL ICED OVER SOUTH OF TOWN. ADDITIONAL JAMS REMAIN
POSSIBLE AS THIS ICE FLOW MOVES SOUTH. AT 7 AM...THE RIVER STAGE IN
FORT DODGE REMAINED ABOVE FLOOD STAGE NEAR 12.1 FT. FLOOD STAGE IS
10.5 FT. THE WATER IS EXPECTED TO DROP BELOW FLOOD STAGE ONCE THE
ICE JAM RELEASES DOWN STREAM LATER TODAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4257 9419 4248 9415 4242 9404 4241 9412
4246 9420 4256 9424
$$
DONAVON577
WGUS73 KDMX 191502
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
902 AM CST SAT FEB 19 2011
IAC187-191530-
/O.CON.KDMX.FF.W.0002.000000T0000Z-110219T1530Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
902 AM CST SAT FEB 19 2011
...FLASH FLOOD WARNING FOR ICE JAM FLOODING REMAINS IN EFFECT FOR
CENTRAL WEBSTER COUNTY UNTIL 930 AM CST...
AT 854 AM CST...AN ICE JAM ON THE DES MOINES RIVER NEAR FORT DODGE
CONTINUED TO PRODUCE MINOR FLOODING IN AND NEAR THE CITY. THE RIVER
LEVEL ROSE NEARLY 3.7 FEET IN AROUND TWO HOURS EARLY SATURDAY
MORNING.
THE 800 AM STAGE WAS 12.02 FEET...AND HAS BEEN FAIRLY STEADY
RECENTLY. IT IS EXPECTED TO BEGIN FALLING LATER THIS MORNING
HOWEVER...DROPPING BELOW FLOOD STAGE LATER TODAY. A RIVER FLOOD
WARNING WILL LIKELY BE ISSUED FOR THIS LOCATION ONCE THIS FLASH
FLOOD WARNING EXPIRES.
SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...FORT
DODGE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR
OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND
IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE
IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO
CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4257 9419 4248 9415 4242 9404 4241 9412
4246 9420 4256 9424
$$
SMALL416
WGUS73 KDMX 191530
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
930 AM CST SAT FEB 19 2011
IAC187-191541-
/O.EXP.KDMX.FF.W.0002.000000T0000Z-110219T1530Z/
/00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
930 AM CST SAT FEB 19 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CENTRAL WEBSTER
COUNTY WILL BE ALLOWED TO EXPIRE AT 930 AM CST...
THE DES MOINES RIVER AT FORT DODGE APPEARS TO BE RECEDING AFTER AN
ICE JAM CAUSED RAPID RISES EARLIER THIS MORNING. NO ADDITIONAL
RAPID RISES ARE ANTICIPATED SO THE FLASH FLOOD WARNING HAS BEEN
ALLOWED TO EXPIRE.
A RIVER FLOOD WARNING REMAINS IN EFFECT HOWEVER. THE 900 AM STAGE
WAS 11.9 FEET AND SLOWLY FALLING. FLOOD STAGE IS 10.5 FEET. PLEASE
MONITOR LATER RIVER FLOOD STATEMENTS FOR UPDATED INFORMATION.
LAT...LON 4257 9419 4248 9415 4242 9404 4241 9412
4246 9420 4256 9424
$$
SMALLThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 7:54 PM CST | River Flood Warning | DMX | Humboldt, Kossuth | 8 days |
| Feb 19, 4:02 AM CST | Winter Storm Warning | DMX | Bremer, Cerro Gordo, Emmet, Hancock, Kossuth, Palo Alto and 2 more | 33 hr |
| Feb 19, 9:25 AM CST | River Flood Warning | DMX | Webster | 32 hr |
| Feb 19, 4:20 PM CST | Winter Weather Advisory | DMX | Black Hawk, Bremer, Butler, Franklin, Grundy, Humboldt and 2 more | 17 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.