Alert archive / Iowa / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 24, 2021, 8:15 PM CDT for Davis County, Wapello County, Iowa. It was in force for 6 hr. 5 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 24, 2021, 8:15 PM CDT (01:15 UTC)
- Expired
- Jun 25, 2021, 2:09 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Davis County, IA, Wapello County, IA
The radar
The Des Moines radar (KDMX), 142 km from the middle of the area, began a volume at 01:19 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 24, 8:19 PM CDT | HEAVY RAIN 3.49 | Agency, IA | STORM TOTAL RAINFALL THUS FAR. STILL RAINING. |
| Jun 24, 8:39 PM CDT | HEAVY RAIN 4.7 | 3 N Floris, IA | RELAYED FROM BROADCAST MEDIA. |
| Jun 24, 9:00 PM CDT | HEAVY RAIN 5.99 | Eldon, IA | TOTAL RAINFALL THUS FAR AT THE ELDON CITY HALL. |
| Jun 25, 12:00 AM CDT | FLASH FLOOD | Eldon, IA | FLASH FLOODING, INCLUDING BASEMENT FLOODING OF CITY HALL, AND STREET AND HIGHWAY FLOODING IN AND AROUND THE TOWN OF ELDON. |
| Jun 25, 12:35 AM CDT | FLASH FLOOD | 3 Nnw Eldon, IA | TRAINED SPOTTER RELAYED THAT MULTIPLE CREEKS WERE OUT OF BANK AND FLOWING WATER ACROSS HIGHWAY 16. ESTIMATED TO BE 6 INCHES OR MORE OF FLOWING WATER. UNCERTAIN WHEN FLOODING BEGAN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.3 hours before the alert went out and 178 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
- 112 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 817 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted.
514
WGUS53 KDMX 250115
FFWDMX
IAC051-179-250715-
/O.NEW.KDMX.FF.W.0001.210625T0115Z-210625T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Des Moines IA
815 PM CDT Thu Jun 24 2021
The National Weather Service in Des Moines has issued a
* Flash Flood Warning for...
Northern Davis County in southeastern Iowa...
Southern Wapello County in southeastern Iowa...
* Until 215 AM CDT.
* At 815 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 3.5 inches of
rain have fallen. Additional thunderstorms with heavy rain are
possible tonight. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Ottumwa, Bloomfield, Eldon, Agency, Blakesburg, Drakesville,
Floris and Lake Wapello State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4103 9264 4103 9218 4090 9218 4075 9218
4075 9264
FLASH FLOOD...RADAR INDICATED
$$
Zogg2 follow-up statements
410
WGUS73 KDMX 250204
FFSDMX
Flash Flood Statement
National Weather Service Des Moines IA
904 PM CDT Thu Jun 24 2021
IAC051-179-250715-
/O.CON.KDMX.FF.W.0001.000000T0000Z-210625T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Davis IA-Wapello IA-
904 PM CDT Thu Jun 24 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM CDT FRIDAY FOR
NORTHERN DAVIS AND SOUTHERN WAPELLO COUNTIES...
At 904 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Wapello County Emergency Management
reports that 6 inches of rain has fallen thus far in Eldon. Highway
16 is closed in town due to flooding of the road. Flash flooding is
ongoing or expected to begin shortly elsewhere in the warned area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Ottumwa, Bloomfield, Eldon, Agency, Blakesburg, Drakesville,
Floris and Lake Wapello State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4103 9264 4103 9218 4090 9218 4075 9218
4075 9264
FLASH FLOOD...RADAR INDICATED
$$
Zogg738
WGUS73 KDMX 250709
FFSDMX
Flash Flood Statement
National Weather Service Des Moines IA
209 AM CDT Fri Jun 25 2021
IAC051-179-250719-
/O.CAN.KDMX.FF.W.0001.000000T0000Z-210625T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Davis IA-Wapello IA-
209 AM CDT Fri Jun 25 2021
...FLASH FLOOD WARNING FOR NORTHERN DAVIS AND SOUTHERN WAPELLO
COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING...
LAT...LON 4103 9264 4103 9218 4090 9218 4075 9218
4075 9264
$$
CurtisThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 7:03 PM CDT | Severe Thunderstorm Warning | DMX | Wapello | 42 min |
| Jun 24, 9:21 PM CDT | Flash Flood Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 5 hr |
| Jun 24, 11:20 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 25 min |
| Jun 25, 2:08 AM CDT | Areal Flood Warning | DMX | Davis, Wapello | 12 hr |
| Jun 25, 2:15 AM CDT | Areal Flood Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 12 hr |
| Jun 25, 2:24 PM CDT | Flash Flood Watch | DMX | Appanoose, Davis, Decatur, Lucas, Monroe, Ringgold and 3 more | 17 hr |
Nearby
Flash Flood Warnings in Iowa, 2021Every flash flood warning in 2021
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.