Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 5, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Mar 17, 2021, 11:10 PM CDT for Jackson County, Marshall County, Alabama. 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
- Mar 17, 2021, 11:10 PM CDT (04:10 UTC)
- Expired
- Mar 18, 2021, 3:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Jackson County, AL, Marshall County, AL
The radar
The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 04:08 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, 4.2 hours before the alert went out and 168 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
- 188 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 465 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
936
WGUS54 KHUN 180410
FFWHUN
ALC071-095-180800-
/O.NEW.KHUN.FF.W.0005.210318T0410Z-210318T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
1110 PM CDT Wed Mar 17 2021
The National Weather Service in Huntsville has issued a
* Flash Flood Warning for...
West Central Jackson County in northeastern Alabama...
Northern Marshall County in northeastern Alabama...
* Until 300 AM CDT.
* At 1110 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 6 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Woodville, Paint Rock and Lim Rock.
Runoff from previous rainfall has produced flash flooding in and
north of the Woodville area, particularly near the intersection of
CR and CR 30. In this location water almost up to the top of
mailboxes was reported by emergency management.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3461 8634 3463 8635 3467 8635 3470 8623
3471 8618 3465 8614 3460 8624 3460 8630
3460 8632 3461 8632
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
KTW1 follow-up statement
124
WGUS74 KHUN 180420
FFSHUN
Flash Flood Statement
National Weather Service Huntsville AL
1120 PM CDT Wed Mar 17 2021
ALC095-180430-
/O.CAN.KHUN.FF.W.0005.000000T0000Z-210318T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marshall AL-
1120 PM CDT Wed Mar 17 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN MARSHALL COUNTY...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Thursday for
portions of north Alabama and southern middle Tennessee.
LAT...LON 3461 8634 3463 8635 3467 8635 3470 8623
3471 8618 3465 8614 3460 8624 3460 8630
3460 8632 3461 8632
$$
ALC071-180800-
/O.CON.KHUN.FF.W.0005.000000T0000Z-210318T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson AL-
1120 PM CDT Wed Mar 17 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 3 AM CDT THURSDAY FOR
WEST CENTRAL JACKSON COUNTY...
At 1120 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 6 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Woodville, Paint Rock and Lim Rock.
Runoff from previous rainfall has produced flash flooding in and
north of the Woodville area, particularly near the intersection of
CR 8 and CR 30. In this location water almost up to the top of
mailboxes was reported by emergency management.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3461 8634 3463 8635 3467 8635 3470 8623
3471 8618 3465 8614 3460 8624 3460 8630
3460 8632 3461 8632
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BCCThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 7:40 PM CDT | Areal Flood Warning | HUN | Colbert, Lauderdale | 6 hr |
| Mar 17, 7:54 PM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 36 min |
| Mar 17, 8:16 PM CDT | Areal Flood Warning | HUN | DeKalb, Jackson, Madison, Marshall, Morgan | 6 hr |
| Mar 17, 8:17 PM CDT | Special Weather Statement | HUN | Colbert, Franklin | 43 min |
| Mar 17, 8:26 PM CDT | Special Weather Statement | HUN | Lauderdale | 34 min |
| Mar 17, 8:47 PM CDT | Areal Flood Warning | HUN | Madison | 11 hr |
| Mar 17, 8:50 PM CDT | Special Weather Statement | HUN | Colbert, Lauderdale, Lawrence | 25 min |
| Mar 17, 9:06 PM CDT | River Flood Warning | HUN | Lawrence | 24 hr |
| Mar 17, 9:07 PM CDT | Flash Flood Warning | HUN | Colbert, Lauderdale | 3 hr |
| Mar 17, 9:14 PM CDT | Special Weather Statement | HUN | Cullman | 31 min |
| Mar 17, 9:19 PM CDT | Flash Flood Warning | HUN | Jackson, Madison, Marshall, Morgan | 3 hr |
| Mar 17, 9:34 PM CDT | Areal Flood Warning | HUN | DeKalb | 6 hr |
| Mar 17, 9:45 PM CDT | Special Weather Statement | HUN | Marshall, Morgan | 30 min |
| Mar 17, 10:09 PM CDT | Areal Flood Warning | HUN | Cullman, Madison, Morgan | 6 hr |
| Mar 17, 10:13 PM CDT | Special Weather Statement | HUN | DeKalb, Jackson | 47 min |
| Mar 17, 10:44 PM CDT | Tornado Warning | HUN | DeKalb | 13 min |
| Mar 17, 11:03 PM CDT | Special Weather Statement | HUN | DeKalb | 27 min |
| Mar 18, 12:03 AM CDT | Areal Flood Warning | HUN | Marshall | 117 min |
| Mar 18, 1:30 AM CDT | Areal Flood Warning | HUN | Cullman, DeKalb, Jackson, Madison, Marshall, Morgan | 8 hr |
| Mar 18, 8:35 AM CDT | Areal Flood Warning | HUN | Madison | 2 hr |
| Mar 18, 10:15 AM CDT | River Flood Warning | HUN | Jackson, Madison, Marshall | 67 hr |
| Mar 18, 10:45 AM CDT | River Flood Warning | HUN | Colbert, Lauderdale | 4 days |
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.