Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 39, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 24, 2016, 10:19 PM CDT for Clarke County, Madison County, Warren County, Iowa. It was in force for 6 hr. 1 report 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
- Sep 24, 2016, 10:19 PM CDT (03:19 UTC)
- Expired
- Sep 25, 2016, 4:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clarke County, IA, Madison County, IA, Warren County, IA
The radar
The Des Moines radar (KDMX), 49 km from the middle of the area, began a volume at 03:22 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 |
|---|---|---|---|
| Sep 24, 11:00 PM CDT | FLASH FLOOD | 1 Sw Murray, IA | TRAINED SPOTTER REPORTED FLOODING IN MURRAY... 6 TO 8 INCHES OF STANDING WATER STILL IN CITY PARK AT TIME OF REPORT. DRIVEWAY CULVERT DESTROYED BY WATER. A MOBILE HOME SURROUNDED BY 1 FOOT STANDING WATER ON ALL SIDES. DITCHES SEVERAL FEET DEEP FILLED WITH WATE |
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, 3.3 hours before the alert went out and 215 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
- 1448 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
439
WGUS53 KDMX 250319
FFWDMX
IAC039-121-181-250915-
/O.NEW.KDMX.FF.W.0039.160925T0319Z-160925T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1019 PM CDT SAT SEP 24 2016
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN MADISON COUNTY IN SOUTH CENTRAL IOWA...
NORTHWESTERN CLARKE COUNTY IN SOUTH CENTRAL IOWA...
WESTERN WARREN COUNTY IN SOUTH CENTRAL IOWA...
* UNTIL 415 AM CDT.
* AT 1018 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE TO FOUR INCHES OF
RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN
SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WINTERSET...AVENUE OF THE SAINTS EVENT CENTER...MURRAY...ST.
CHARLES...NEW VIRGINIA...TRURO...MARTENSDALE...PATTERSON...ST.
MARYS...EAST PERU...SPRING HILL AND BEVINGTON.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 37 AND 64.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.
&&
LAT...LON 4144 9364 4108 9369 4102 9401 4132 9402
4147 9381
$$
SKOW1 follow-up statement
523
WGUS73 KDMX 250911
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
411 AM CDT SUN SEP 25 2016
IAC039-121-181-250920-
/O.EXP.KDMX.FF.W.0039.000000T0000Z-160925T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MADISON IA-CLARKE IA-WARREN IA-
411 AM CDT SUN SEP 25 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN MADISON...NORTHWESTERN
CLARKE AND WESTERN WARREN COUNTIES WILL EXPIRE AT 415 AM CDT...
FLOOD WATERS HAVE RECEDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT.
LAT...LON 4144 9364 4108 9369 4102 9401 4132 9402
4147 9381
$$
COGILThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 24, 8:37 PM CDT | Special Weather Statement | DMX | Polk, Warren | 38 min |
| Sep 25, 4:33 PM CDT | River Flood Warning | DMX | Black Hawk, Bremer, Butler | 3 days |
| Sep 25, 4:51 PM CDT | River Flood Warning | DMX | Hamilton, Webster | 32 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.