Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Feb 22, 2016, 12:29 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 22, 2016, 12:29 AM CST (06:29 UTC)
- Expired
- Feb 22, 2016, 6:30 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), 93 km from the middle of the area, began a volume at 06:33 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, 6.5 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
- 991 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
405
WGUS53 KDMX 220629
FFWDMX
IAC187-221230-
/O.NEW.KDMX.FF.W.0001.160222T0629Z-160222T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1229 AM CST MON FEB 22 2016
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL WEBSTER COUNTY IN CENTRAL IOWA...
* UNTIL 630 AM CST MONDAY
* AT 1226 AM CST...LOCAL LAW ENFORCEMENT REPORTED A LARGE ICE JAM
600 YARDS SOUTH OF THE HIGHWAY D14 BRIDGE WITH FLOODING REPORTED
IN THE RIVERDALE DR AREA. THIS ICE JAM WILL LIKELY CAUSE FLOODING
IN THE SCENIC DRIVE AND BREEN ROAD AREAS. FLASH FLOODING ACROSS
THE WARNED AREA. FLASH FLOODING IS ALREADY OCCURRING.
THIS ICE JAM IS EXPECTED TO MOVE SLOWLY SOUTH AND WILL CAUSE FLASH
FLOODING UPSTREAM OF IT TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
&&
LAT...LON 4255 9416 4249 9416 4245 9410 4244 9419
4254 9423
$$
DONAVON1 follow-up statement
287
WGUS73 KDMX 221037
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
437 AM CST MON FEB 22 2016
IAC187-221230-
/O.CON.KDMX.FF.W.0001.000000T0000Z-160222T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-
437 AM CST MON FEB 22 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 AM CST MONDAY
FOR CENTRAL WEBSTER COUNTY...
AT 434 AM CST...LOCAL LAW ENFORCEMENT REPORTED A LARGE ICE JAM
REMAINED JUST SOUTH OF THE HIGHWAY D14 BRIDGE WITH FLOODING REPORTED
IN THE RIVERDALE DR AREA. THIS ICE JAM MAY CAUSE FLOODING IN THE
SCENIC DRIVE AND BREEN ADDITION AREAS.
THIS ICE JAM IS EXPECTED TO MOVE SLOWLY SOUTH. RIVER RISES UPSTREAM
OF THIS JAM HAVE JUMPED 3 TO 4 FEET OVER A SHORT PERIOD OF TIME.
FLASH FLOODING UPSTREAM OF THE JAM IS LIKELY IN LOW LYING AND
FLOOD PRONE AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.
&&
LAT...LON 4255 9416 4249 9416 4245 9410 4244 9419
4254 9423
$$
DONAVONThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 7:28 PM CST | Areal Flood Warning | DMX | Boone, Dallas | 24 hr |
| Feb 21, 7:42 PM CST | River Flood Warning | DMX | Davis, Wapello | 5 days |
| Feb 22, 6:31 AM CST | Areal Flood Warning | DMX | Webster | 24 hr |
| Feb 22, 10:04 AM CST | River Flood Warning | DMX | Mahaska, Wapello | 6 days |
| Feb 22, 10:52 AM CST | River Flood Warning | DMX | Polk | 4 days |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
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.