Alert archive / Alabama / Areal Flood Warnings in 2021
Areal Flood Warning 52, NWS Huntsville, AL
NWS Huntsville, AL issued this areal flood warning at Sep 20, 2021, 3:34 PM CDT for DeKalb County, Alabama. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 20, 2021, 3:34 PM CDT (20:34 UTC)
- Expired
- Sep 20, 2021, 6:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County DeKalb County, AL
The radar
The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 20:37 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, 8.6 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
- 513 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this areal flood warning went out at Sep 20, 1:33 PM CDT, 2 hours 1 minute earlier.
Area forecast discussion, Sep 20, 1:33 PM CDT, 2 hours 1 minute before
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</html>Hazardous weather outlook, Sep 20, 1:55 PM CDT, 1 hour 39 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 155 PM CDT Mon Sep 20 2021 ALZ001>010-016-TNZ076-096-097-211000- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 155 PM CDT Mon Sep 20 2021 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... Periods of moderate to locally heavy rainfall and a few embedded thunderstorms will will be possible today. This will result in an enhanced threat for flash, areal, and mainstem river flooding. A Flash Flood Watch remains in effect for the entire region through 7 PM this evening. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... Additional rounds of showers and thunderstorms will impact the Tennessee Valley on Tuesday, with an attendant threat for locally heavy rainfall and flooding. The risk for thunderstorms and flash flooding will end from northwest-to-southeast late Tuesday night and early Wednesday morning, as a strong cold front shifts southeastward. However, areal and mainstem river flooding may continue across portions of the area through the end of the week. .SPOTTER CALL TO ACTION STATEMENT... Activation of storm spotters and emergency management personnel in support of flooding is possible this afternoon and evening.
In the hours before
Local storm report, Sep 20, 2:08 PM CDT, 1 hour 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
208 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0206 PM FLASH FLOOD 10 SSE FAYETTEVILLE 35.01N 86.50W
09/19/2021 LINCOLN TN EMERGENCY MNGR
A WATER RESCUE OCCURRED DUE TO FLASH
FLOODING AT 40 VANNTOWN ROAD. TIME
ESTIMATED.
&&Local storm report, Sep 20, 2:10 PM CDT, 1 hour 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
210 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0145 PM FLASH FLOOD 10 SSE FAYETTEVILLE 35.03N 86.48W
09/19/2021 LINCOLN TN EMERGENCY MNGR
A WATER RESCUE WAS PERFORMED DUE TO FLASH
FLOODING AT 7 M. JONES ROAD AND WALKER FORD
ROAD. TIME ESTIMATED.
&&Local storm report, Sep 20, 2:11 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
211 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0145 PM FLASH FLOOD 6 SSW FAYETTEVILLE 35.06N 86.59W
09/19/2021 LINCOLN TN EMERGENCY MNGR
A WATER RESCUE WAS PERFORMED DUE TO FLASH
FLOODING AT 125 HIGHLAND RIM ROAD. TIME
ESTIMATED.
&&Local storm report, Sep 20, 2:12 PM CDT, 1 hour 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
212 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0145 PM FLASH FLOOD 2 SW PETERSBURG 35.30N 86.67W
09/19/2021 LINCOLN TN EMERGENCY MNGR
NORTH FISHING FORD ROAD WAS CLOSED DUE TO
FLASH FLOODING. TIME ESTIMATED.
&&Local storm report, Sep 20, 2:13 PM CDT, 1 hour 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
213 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0145 PM FLASH FLOOD 5 S FAYETTEVILLE 35.08N 86.56W
09/19/2021 LINCOLN TN EMERGENCY MNGR
THE ROAD WAS CLOSED AT 76 PROSPECT ROAD DUE
TO FLASH FLOODING. TIME ESTIMATED.
&&Local storm report, Sep 20, 2:14 PM CDT, 1 hour 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
214 PM CDT MON SEP 20 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0145 PM FLASH FLOOD 9 W HUNTLAND 35.06N 86.43W
09/19/2021 LINCOLN TN EMERGENCY MNGR
SMITH LANE IN FLINTVILLE WAS CLOSED DUE TO
FLASH FLOODING. TIME ESTIMATED.
&&The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 9:03 PM CDT | River Flood Warning | HUN | Madison | 12 hr |
| Sep 19, 9:39 PM CDT | Areal Flood Warning | HUN | Madison | 3 hr |
| Sep 20, 12:55 AM CDT | Areal Flood Warning | HUN | Madison | 4 hr |
| Sep 20, 5:01 AM CDT | Areal Flood Warning | HUN | Madison | 3 hr |
| Sep 20, 4:23 PM CDT | Flash Flood Warning | HUN | DeKalb | 90 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.