Alert archive / Iowa / Flash Flood Warnings in 2021
Flash Flood Warning 12, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Aug 12, 2021, 9:23 AM CDT for Van Buren County, Iowa. It was in force for 4 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
- Aug 12, 2021, 9:23 AM CDT (14:23 UTC)
- Expired
- Aug 12, 2021, 1:31 PM CDT
- In force
- 4 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Van Buren County, IA
The radar
The Quad Cities radar (KDVN), 138 km from the middle of the area, began a volume at 14:25 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
Davenport, (KDVN), launched 12:00Z, 2.4 hours before the alert went out and 144 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
- 2463 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
018
WGUS53 KDVN 121423
FFWDVN
IAC177-122030-
/O.NEW.KDVN.FF.W.0012.210812T1423Z-210812T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Quad Cities IA IL
923 AM CDT Thu Aug 12 2021
The National Weather Service in Quad Cities has issued a
* Flash Flood Warning for...
Northern Van Buren County in southeastern Iowa...
* Until 330 PM CDT Thursday.
* At 923 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. 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...
Keosauqua, Birmingham, Stockport, Bentonsport/Vernon, Douds,
Leando, Kilbourn, Mount Zion, Van Buren County Fairgrounds,
Keosauqua Airport, Utica, Lebanon, Morris Park and Selma.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4084 9172 4071 9172 4074 9218 4083 9218
4088 9218 4090 9218 4090 9172 4089 9172
4088 9172 4086 9172 4085 9172
FLASH FLOOD...RADAR INDICATED
$$
Gross2 follow-up statements
997
WGUS73 KDVN 121633
FFSDVN
Flash Flood Statement
National Weather Service Quad Cities IA IL
1133 AM CDT Thu Aug 12 2021
IAC177-122030-
/O.CON.KDVN.FF.W.0012.000000T0000Z-210812T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Van Buren IA-
1133 AM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 PM CDT THIS
AFTERNOON FOR NORTHERN VAN BUREN COUNTY...
At 1133 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Two
inches of rain has fallen in Farmington in past 3 hours. Additional
rainfall amounts up to 1 inch are possible in the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Keosauqua, Birmingham, Stockport, Bentonsport/Vernon, Douds,
Leando, Kilbourn, Mount Zion, Van Buren County Fairgrounds,
Keosauqua Airport, Utica, Lebanon, Morris Park and Selma.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4084 9172 4071 9172 4074 9218 4083 9218
4088 9218 4090 9218 4090 9172 4089 9172
4088 9172 4086 9172 4085 9172
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Gross074
WGUS73 KDVN 121831
FFSDVN
Flash Flood Statement
National Weather Service Quad Cities IA IL
131 PM CDT Thu Aug 12 2021
IAC177-121841-
/O.CAN.KDVN.FF.W.0012.000000T0000Z-210812T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Van Buren IA-
131 PM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN VAN BUREN COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Friday for
portions of west central Illinois, southeast Iowa and northeast
Missouri.
LAT...LON 4084 9172 4071 9172 4074 9218 4083 9218
4088 9218 4090 9218 4090 9172 4089 9172
4088 9172 4086 9172 4085 9172
$$
GrossThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:09 AM CDT | Special Weather Statement | DVN | Lee | 21 min |
| Aug 12, 2:57 AM CDT | Heat Advisory | DVN | Lee | 8 hr |
| Aug 12, 7:24 AM CDT | Special Weather Statement | DVN | Van Buren | 36 min |
| Aug 12, 7:26 AM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 33 min |
| Aug 12, 9:10 AM CDT | Special Weather Statement | DVN | Van Buren | 50 min |
| Aug 12, 9:54 AM CDT | Special Weather Statement | DVN | Lee, Van Buren | 96 min |
| Aug 12, 10:32 AM CDT | Flash Flood Warning | DVN | Lee, Van Buren | 6 hr |
| Aug 12, 11:29 AM CDT | Special Weather Statement | DVN | Lee, Van Buren | 91 min |
| Aug 12, 12:44 PM CDT | Flash Flood Watch | DVN | Des Moines, Lee, Van Buren | 8 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.