Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 26, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Jul 25, 2021, 6:11 PM CDT for Madison County, Alabama. It was in force for 105 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 25, 2021, 6:11 PM CDT (23:11 UTC)
- Expired
- Jul 25, 2021, 7:56 PM CDT
- In force
- 105 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 57 km from the middle of the area, began a volume at 23:12 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
Birmingham, AL (KBMX), launched 12:00Z, 11.2 hours before the alert went out and 160 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
- 1352 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 851 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
305
WGUS54 KHUN 252311
FFWHUN
ALC089-260215-
/O.NEW.KHUN.FF.W.0026.210725T2311Z-210726T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
611 PM CDT Sun Jul 25 2021
The National Weather Service in Huntsville has issued a
* Flash Flood Warning for...
Southwestern Madison County in north central Alabama...
* Until 915 PM CDT.
* At 611 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across portions of Central Madison County, including
southeast Huntsville. 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...
Southeast Huntsville, Redstone Arsenal, Owens Cross Roads, Farley,
Whitesburg and Hampton Cove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3473 8658 3465 8643 3451 8654 3454 8655
3456 8655 3457 8656 3458 8659 3457 8662
3463 8669
FLASH FLOOD...RADAR INDICATED
$$
121 follow-up statement
461
WGUS74 KHUN 260056
FFSHUN
Flash Flood Statement
National Weather Service Huntsville AL
756 PM CDT Sun Jul 25 2021
ALC089-260106-
/O.CAN.KHUN.FF.W.0026.000000T0000Z-210726T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Madison AL-
756 PM CDT Sun Jul 25 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN MADISON
COUNTY...
Flood waters have receded and the heavy rain has ended. Flooding is
no longer expected to pose a threat. Please continue to heed
remaining road closures.
LAT...LON 3473 8658 3465 8643 3451 8654 3454 8655
3456 8655 3457 8656 3458 8659 3457 8662
3463 8669
$$
12The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 12:54 PM CDT | Heat Advisory | HUN | Colbert, Lauderdale | 5 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.