Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 37, NWS Tallahassee, FL
NWS Tallahassee, FL issued this flash flood warning at Sep 18, 2021, 6:49 PM CDT for Geneva County, Alabama. It was in force for 3 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 18, 2021, 6:49 PM CDT (23:49 UTC)
- Expired
- Sep 18, 2021, 10:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Tallahassee, FL
- Area
- Storm-based polygon
- Flood severity
- None
County Geneva County, AL
The radar
The Eglin Afb radar (KEVX), 63 km from the middle of the area, began a volume at 23:49 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 18, 7:30 PM CDT | FLASH FLOOD | 1 Sw Sellersville, AL | PARTIAL ROAD WASHOUT DUE TO HEAVY RAIN ON COFFEE SPRINGS ROAD HEADING INTO SELLERSVILLE FROM SAMSON. PICTURE POSTED ON SOCIAL MEDIA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.8 hours before the alert went out and 189 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
- 886 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
233
WGUS52 KTAE 182349
FFWTAE
ALC061-190300-
/O.NEW.KTAE.FF.W.0037.210918T2349Z-210919T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
649 PM CDT Sat Sep 18 2021
The National Weather Service in Tallahassee has issued a
* Flash Flood Warning for...
Northwestern Geneva County in southeastern Alabama...
* Until 1000 PM CDT.
* At 649 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across 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...
Samson, Logan Field Municipal A/P, Pera, Sellersville, Ganer,
Marl, Spears, Weeks, Earlytown and Hacoda.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3115 8616 3118 8596 3111 8585 3102 8619
3106 8619 3112 8619
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
459
WGUS72 KTAE 190300
FFSTAE
Flash Flood Statement
National Weather Service Tallahassee FL
1000 PM CDT Sat Sep 18 2021
ALC061-190310-
/O.EXP.KTAE.FF.W.0037.000000T0000Z-210919T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Geneva AL-
1000 PM CDT Sat Sep 18 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN GENEVA COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3115 8616 3118 8596 3111 8585 3102 8619
3106 8619 3112 8619
$$The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 3:38 PM CDT | Areal Flood Advisory | TAE | Henry | 4 hr |
| Sep 18, 4:20 PM CDT | Areal Flood Advisory | TAE | Houston | 4 hr |
| Sep 18, 4:39 PM CDT | Areal Flood Advisory | TAE | Dale, Henry, Houston | 4 hr |
| Sep 18, 4:46 PM CDT | Special Weather Statement | TAE | Houston | 44 min |
| Sep 18, 5:36 PM CDT | Areal Flood Advisory | TAE | Geneva | 3 hr |
| Sep 18, 5:44 PM CDT | Flash Flood Warning | TAE | Henry, Houston | 3 hr |
| Sep 18, 5:47 PM CDT | Areal Flood Advisory | TAE | Houston | 3 hr |
| Sep 18, 6:26 PM CDT | Areal Flood Advisory | TAE | Dale, Geneva, Houston | 3 hr |
Nearby
Flash Flood Warnings in Alabama, 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.