Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 49, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Oct 6, 2021, 10:50 PM CDT for Jackson County, Marshall County, Alabama. It was in force for 2 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
- Oct 6, 2021, 10:50 PM CDT (03:50 UTC)
- Expired
- Oct 7, 2021, 1:00 AM CDT
- In force
- 2 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jackson County, AL, Marshall County, AL
The radar
The Northeast Alabama radar (KHTX), 54 km from the middle of the area, began a volume at 03:52 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 00:00Z, 3.8 hours before the alert went out and 152 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
- 1415 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.8
The text
As transmitted.
430
WGUS54 KHUN 070350
FFWHUN
ALC071-095-070600-
/O.NEW.KHUN.FF.W.0049.211007T0350Z-211007T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
1050 PM CDT Wed Oct 6 2021
The National Weather Service in Huntsville has issued a
* Flash Flood Warning for...
Southwestern Jackson County in northeastern Alabama...
Northeastern Marshall County in northeastern Alabama...
* Until 100 AM CDT.
* At 1050 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...
Albertville, Scottsboro, Guntersville, Grant, Woodville, Langston,
Columbus City, Lake Guntersville St Park, Hustleville and Rabbit
Town.
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.
&&
LAT...LON 3460 8629 3465 8623 3465 8614 3455 8601
3443 8611 3440 8611 3440 8612 3438 8611
3429 8613 3423 8621 3426 8629
FLASH FLOOD...RADAR INDICATED
$$
MA1 follow-up statement
873
WGUS74 KHUN 070553 RRA
FFSHUN
Flash Flood Statement
National Weather Service Huntsville AL
1253 AM CDT Thu Oct 7 2021
ALC071-095-070603-
/O.EXP.KHUN.FF.W.0049.000000T0000Z-211007T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson AL-Marshall AL-
1253 AM CDT Thu Oct 7 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1 AM CDT EARLY THIS MORNING
FOR SOUTHWESTERN JACKSON AND NORTHEASTERN MARSHALL COUNTIES...
The heavy rain has ended. A new Areal Flood Warning has replaced
this as residual flooding is still ongoing. Please continue to heed
remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Thursday for
portions of Alabama and southern middle Tennessee.
LAT...LON 3460 8629 3465 8623 3465 8614 3455 8601
3443 8611 3440 8611 3440 8612 3438 8611
3429 8613 3423 8621 3426 8629
$$
GHThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 7:36 PM CDT | Special Weather Statement | HUN | Marshall | 39 min |
| Oct 6, 8:13 PM CDT | Special Weather Statement | HUN | Marshall | 47 min |
| Oct 6, 8:36 PM CDT | Flash Flood Warning | HUN | Cullman | 4 hr |
| Oct 6, 9:02 PM CDT | Special Weather Statement | HUN | Madison | 43 min |
| Oct 7, 12:50 AM CDT | Areal Flood Warning | HUN | Cullman, Jackson, Madison, Marshall | 8 hr |
| Oct 7, 8:57 AM CDT | Areal Flood Warning | HUN | Cullman | 111 min |
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.