Alert archive / Alabama / Areal Flood Warnings in 2021
Areal Flood Warning 21, NWS Huntsville, AL
NWS Huntsville, AL issued this areal flood warning at Mar 31, 2021, 11:35 AM CDT for 5 counties in Alabama. It was in force for 6 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
- Mar 31, 2021, 11:35 AM CDT (16:35 UTC)
- Expired
- Mar 31, 2021, 5:24 PM CDT
- In force
- 6 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties DeKalb County, AL, Jackson County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL
The radar
The Northeast Alabama radar (KHTX), 57 km from the middle of the area, began a volume at 16:38 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 |
|---|---|---|---|
| Mar 31, 12:32 PM CDT | FLASH FLOOD | 1 Ene Stevenson, AL | OLD MOUNT CARMEL ROAD HAS BEEN CLOSED DUE TO FLASH FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 4.6 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
- 455 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 527 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 283 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted.
510
WGUS44 KHUN 311635
FLWHUN
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Huntsville AL
1135 AM CDT Wed Mar 31 2021
ALC049-071-089-095-103-312230-
/O.NEW.KHUN.FA.W.0021.210331T1635Z-210331T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DeKalb AL-Jackson AL-Madison AL-Marshall AL-Morgan AL-
1135 AM CDT Wed Mar 31 2021
The National Weather Service in Huntsville has issued a
* Flood Warning for...
Southeastern Madison County in north central Alabama...
Southeastern Morgan County in north central Alabama...
DeKalb County in northeastern Alabama...
Jackson County in northeastern Alabama...
Marshall County in northeastern Alabama...
* Until 530 PM CDT.
* At 1135 AM CDT, emergency management had reported heavy rain had
caused areas of flooding. Between 2 and 4 inches of rain have
fallen.
Some locations that will experience flooding include...
Southern Huntsville, Albertville, Scottsboro, Fort Payne, Boaz,
Guntersville, Arab, Rainsville, Bridgeport, Henagar, Stevenson,
Crossville, Sylvania, Owens Cross Roads, Fyffe, Hollywood, Powell,
Grant, Geraldine and Skyline.
Though rain is ending, flooding problems will likely continue to
linger for the next several hours.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3431 8682 3447 8678 3456 8654 3472 8633
3499 8593 3497 8560 3452 8551 3447 8558
3444 8558 3436 8564 3426 8577 3424 8584
3420 8584 3420 8611 3418 8619 3410 8631
3429 8648
$$
McCoy1 follow-up statement
613
WGUS84 KHUN 312224
FLSHUN
Flood Statement
National Weather Service Huntsville AL
524 PM CDT Wed Mar 31 2021
ALC049-071-089-095-103-312234-
/O.CAN.KHUN.FA.W.0021.000000T0000Z-210331T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DeKalb AL-Jackson AL-Madison AL-Marshall AL-Morgan AL-
524 PM CDT Wed Mar 31 2021
...FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MADISON, SOUTHEASTERN
MORGAN, DEKALB, JACKSON AND MARSHALL COUNTIES...
Heavy rainfall has ended and flood waters have receded, except along
the Big Wills Creek basin in Fort Payne. Minor flooding will
continue along Big Wills Creek this evening, and a separate Flood
Warning will be issued for just this location.
LAT...LON 3431 8682 3447 8678 3456 8654 3472 8633
3499 8593 3497 8560 3452 8551 3447 8558
3444 8558 3436 8564 3426 8577 3424 8584
3420 8584 3420 8611 3418 8619 3410 8631
3429 8648
$$
12The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 3:38 AM CDT | Special Weather Statement | HUN | Marshall | 52 min |
| Mar 31, 3:56 AM CDT | Special Weather Statement | HUN | Morgan | 49 min |
| Mar 31, 4:59 AM CDT | Areal Flood Warning | HUN | Jackson | 3 hr |
| Mar 31, 6:21 AM CDT | Areal Flood Warning | HUN | Cullman | 3 hr |
| Mar 31, 7:21 AM CDT | Flash Flood Warning | HUN | Cullman | 6 hr |
| Mar 31, 7:30 AM CDT | Flash Flood Warning | HUN | Jackson, Marshall | 4 hr |
| Mar 31, 7:36 AM CDT | Special Weather Statement | HUN | Cullman | 39 min |
| Mar 31, 8:49 AM CDT | Flash Flood Warning | HUN | Madison, Marshall, Morgan | 3 hr |
| Mar 31, 9:41 AM CDT | Flash Flood Warning | HUN | DeKalb, Jackson, Marshall | 119 min |
| Mar 31, 1:06 PM CDT | Areal Flood Warning | HUN | Cullman | 5 hr |
| Mar 31, 1:42 PM CDT | River Flood Warning | HUN | Madison, Marshall, Morgan | 55 hr |
| Mar 31, 1:52 PM CDT | Freeze Watch | HUN | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 13 hr |
| Mar 31, 1:52 PM CDT | Freeze Warning | HUN | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 42 hr |
| Mar 31, 5:29 PM CDT | Areal Flood Warning | HUN | DeKalb | 3 hr |
| Mar 31, 6:18 PM CDT | Areal Flood Warning | HUN | Cullman | 18 hr |
Nearby
Areal Flood Warnings in Alabama, 2021Every areal 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.