Alert archive / Alabama / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 121, NWS Birmingham, AL

August 17, 2024Calhoun County, Cherokee County, Etowah County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 17, 2024, 4:33 PM CDT for Calhoun County, Cherokee County, Etowah County, Alabama. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 17, 2024, 4:33 PM CDT (21:33 UTC)
Expired: Aug 17, 2024, 5:30 PM CDT
In force: 57 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calhoun County, AL, Cherokee County, AL, Etowah County, AL

The radar

The Northeast Alabama radar (KHTX), 107 km from the middle of the area, began a volume at 21:36 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 17, 3:44 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.6 hours before the alert went out and 141 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 792 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

Hazardous weather outlook, Aug 16, 4:52 PM CDT, 23 hours 41 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
452 PM CDT Fri Aug 16 2024

ALZ011>015-017>050-180100-
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee-
Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega-
Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
452 PM CDT Fri Aug 16 2024

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

There is a Marginal Risk (1 out of 5) of severe storms this
afternoon and evening, mainly near and north of Interstate 20.
Threats include damaging winds up to 60 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There is a Marginal Risk (1 out of 5) of severe storms on Saturday
afternoon and evening, with the threat area near and north of I-20.
Threats include damaging winds up to 60 mph.

On Sunday there is a Slight Risk (2 out of 5) of severe storms on
Sunday afternoon and evening. The main threat area will be near the
I-85 and US 80 corridor. All other locations will be under a
Marginal Risk (1 out of 5). Threats include damaging winds up to 60
mph.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may become
necessary Friday, Saturday, and Sunday.

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 16, 7:12 PM CDT	Special Weather Statement	BMX	Cherokee	33 min
Aug 17, 1:07 PM CDT	Special Weather Statement	BMX	Lowndes	53 min
Aug 17, 1:09 PM CDT	Special Weather Statement	BMX	Greene	36 min
Aug 17, 2:06 PM CDT	Special Weather Statement	BMX	Bullock, Macon	39 min
Aug 17, 2:20 PM CDT	Special Weather Statement	BMX	Tuscaloosa	40 min
Aug 17, 2:50 PM CDT	Special Weather Statement	BMX	Tuscaloosa	25 min
Aug 17, 2:52 PM CDT	Special Weather Statement	BMX	Barbour, Pike	53 min
Aug 17, 2:56 PM CDT	Special Weather Statement	BMX	Macon	34 min
Aug 17, 2:57 PM CDT	Special Weather Statement	BMX	Lee	33 min
Aug 17, 3:15 PM CDT	Special Weather Statement	BMX	Bibb	30 min
Aug 17, 3:17 PM CDT	Special Weather Statement	BMX	Jefferson	28 min
Aug 17, 3:46 PM CDT	Special Weather Statement	BMX	Chilton, Shelby	29 min
Aug 17, 3:50 PM CDT	Special Weather Statement	BMX	Blount, Etowah	40 min
Aug 17, 3:58 PM CDT	Special Weather Statement	BMX	Cherokee, Etowah	47 min
Aug 17, 4:00 PM CDT	Special Weather Statement	BMX	Chilton	45 min
Aug 17, 4:10 PM CDT	Severe Thunderstorm Warning	BMX	Shelby	33 min
Aug 17, 4:12 PM CDT	Special Weather Statement	BMX	Perry	33 min
Aug 17, 4:19 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa	41 min
Aug 17, 4:21 PM CDT	Special Weather Statement	BMX	St. Clair	39 min
Aug 17, 4:29 PM CDT	Severe Thunderstorm Warning	BMX	Coosa, St. Clair, Shelby, Talladega	46 min
Aug 17, 4:45 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa, Elmore	50 min
Aug 17, 4:47 PM CDT	Special Weather Statement	BMX	Autauga	43 min
Aug 17, 5:00 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Coosa, Talladega	45 min
Aug 17, 5:07 PM CDT	Special Weather Statement	BMX	Autauga, Elmore	38 min
Aug 17, 5:09 PM CDT	Special Weather Statement	BMX	Calhoun, Cleburne	51 min
Aug 17, 5:25 PM CDT	Severe Thunderstorm Warning	BMX	Clay	50 min
Aug 17, 5:27 PM CDT	Special Weather Statement	BMX	Elmore, Tallapoosa	48 min
Aug 17, 5:30 PM CDT	Special Weather Statement	BMX	Clay	45 min
Aug 17, 5:58 PM CDT	Special Weather Statement	BMX	Cleburne, Randolph	47 min
Aug 17, 6:11 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne, Randolph	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2024 Every severe thunderstorm warning in 2024

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.