Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Mar 31, 2021, 7:30 AM CDT for Jackson County, Marshall County, Alabama. It was in force for 4 hr. 2 reports 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, 7:30 AM CDT (12:30 UTC)
- Expired
- Mar 31, 2021, 11:41 AM CDT
- In force
- 4 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), 25 km from the middle of the area, began a volume at 12:31 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, 7:45 AM CDT | FLASH FLOOD | 7 Ne Woodville, AL | APPROXIMATELY 6 INCHES OF WATER COVERING COUNTY ROAD 30 IN MULTIPLE LOCATIONS, INCLUDING COUNTY ROAD 119. |
| Mar 31, 7:50 AM CDT | FLASH FLOOD | 3 W Hollywood, AL | APPROXIMATELY 6 TO 8 INCHES OF WATER COVERING COUNTY ROAD 105 NEAR COUNTY ROAD 21. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 0.5 hours before the alert went out and 166 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 498 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
366
WGUS54 KHUN 311230
FFWHUN
ALC071-095-311830-
/O.NEW.KHUN.FF.W.0015.210331T1230Z-210331T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
730 AM CDT Wed Mar 31 2021
The National Weather Service in Huntsville has issued a
* Flash Flood Warning for...
Jackson County in northeastern Alabama...
Northeastern Marshall County in northeastern Alabama...
* Until 130 PM CDT.
* At 730 AM CDT, gauge reports indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Scottsboro, Bridgeport, Stevenson, Hollywood, Grant, Skyline,
Section, Woodville, Pisgah, Pleasant Groves, Hytop, Dutton,
Langston, Paint Rock, Martintown, Fackler, Larkinsville, Bass,
Fabius and Rosalie.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3463 8635 3472 8635 3499 8593 3497 8560
3486 8558 3483 8563 3477 8565 3461 8592
3447 8619 3458 8630 3459 8630 3460 8633
3461 8633
FLASH FLOOD...GAUGE INDICATED
$$
McCoy1 follow-up statement
782
WGUS74 KHUN 311641
FFSHUN
Flash Flood Statement
National Weather Service Huntsville AL
1141 AM CDT Wed Mar 31 2021
ALC071-095-311651-
/O.CAN.KHUN.FF.W.0015.000000T0000Z-210331T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jackson AL-Marshall AL-
1141 AM CDT Wed Mar 31 2021
...FLASH FLOOD WARNING IS CANCELLED FOR JACKSON AND NORTHEASTERN
MARSHALL COUNTIES...
This flash flood warning has been replaced with an Areal Flood
Warning. Even though the heavy rain has ended, flooding will
continue to cause problems for the next several hours. Please
continue to heed remaining road closures.
LAT...LON 3463 8635 3472 8635 3499 8593 3497 8560
3486 8558 3483 8563 3477 8565 3461 8592
3447 8619 3458 8630 3459 8630 3460 8633
3461 8633
$$
McCoyThe 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, 7:36 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, 11:35 AM CDT | Areal Flood Warning | HUN | DeKalb, Jackson, Madison, Marshall, Morgan | 6 hr |
| 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
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.