Alert archive / Alabama / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 360, NWS Birmingham, AL

August 7, 2023Lamar County, Marion County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 7, 2023, 1:15 PM CDT for Lamar County, Marion County, Alabama. It was in force for 75 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 7, 2023, 1:15 PM CDT (18:15 UTC)
Expired: Aug 7, 2023, 2:30 PM CDT
In force: 75 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lamar County, AL, Marion County, AL

The radar

The Columbus AFB radar (KGWX), 32 km from the middle of the area, began a volume at 18:19 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 7, 10:40 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 6.3 hours before the alert went out and 142 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: 2377 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 10.7

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.

NWS Birmingham, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 1:04 PM CDT, 11 minutes earlier.

Area forecast discussion, Aug 7, 1:04 PM CDT, 11 minutes before

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Hazardous weather outlook, Aug 7, 4:09 AM CDT, 9 hours 6 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
409 AM CDT Mon Aug 7 2023

ALZ011>015-017>050-081215-
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-
409 AM CDT Mon Aug 7 2023

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

.DAY ONE...Outlook through Tonight.

Severe thunderstorms are possible across Central Alabama today,
mainly this afternoon and evening. Storms will pose a threat of
damaging wind gusts and hail up to quarter size.

Heat indices are expected to range from 105 to 115 degrees across
Central Alabama today.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Additional severe thunderstorms are possible across Central Alabama
on Tuesday and Wednesday. Storms will pose a threat of damaging wind
gusts.

Heat indices could approach 105 degrees across southern portions of
Central Alabama each afternoon Tuesday through Sunday.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
through Wednesday.

In the hours before

Special weather statement, Aug 7, 12:56 PM CDT, 19 minutes before

Special Weather Statement
National Weather Service Birmingham AL
1256 PM CDT Mon Aug 7 2023

ALZ017-018-071845-
Etowah AL-Blount AL-
1256 PM CDT Mon Aug 7 2023

...A strong thunderstorm will impact portions of northeastern Blount
and northwestern Etowah Counties through 145 PM CDT...

At 1254 PM CDT, Doppler radar was tracking a strong thunderstorm over
Snead, or 12 miles northeast of Oneonta, moving east at 25 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Gadsden, Rainbow City, Attalla, Sardis City, Altoona, Snead, Susan
Moore, Walnut Grove, Reece City, Aurora, Gadsden Mall, Noccalula
Falls, Gadsden Steam Plant, Big Wills Creek, Howelton, Crudup,
Mountainboro, Keener, Rockledge and Gadsden Water Works.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
central and northeastern Alabama.

&&

LAT...LON 3397 8595 3403 8648 3415 8647 3416 8637
      3410 8630 3418 8619 3419 8611 3420 8611
      3420 8593
TIME...MOT...LOC 1754Z 269DEG 23KT 3410 8634

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

56

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 9:16 PM CDT	Excessive Heat Warning	BMX	Autauga, Barbour, Bibb, Bullock, Chambers, Chilton and 23 more	24 hr
Aug 7, 12:56 PM CDT	Special Weather Statement	BMX	Etowah	49 min
Aug 7, 1:03 PM CDT	Severe Thunderstorm Warning	BMX	Marion	57 min
Aug 7, 1:16 PM CDT	Special Weather Statement	BMX	Cherokee, Etowah	59 min
Aug 7, 1:39 PM CDT	Severe Thunderstorm Warning	BMX	Winston	53 min
Aug 7, 1:52 PM CDT	Special Weather Statement	BMX	Blount, Fayette, Lamar, Pickens, Walker, Winston	53 min
Aug 7, 2:15 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker, Winston	60 min
Aug 7, 2:22 PM CDT	Special Weather Statement	BMX	Cherokee, Etowah	68 min
Aug 7, 2:33 PM CDT	Severe Thunderstorm Warning	BMX	Blount	57 min
Aug 7, 2:42 PM CDT	Special Weather Statement	BMX	Blount, Fayette, Jefferson, Lamar, Pickens, St. Clair and 2 more	63 min
Aug 7, 2:47 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Fayette, Jefferson, Lamar, Pickens, Tuscaloosa and 2 more	58 min
Aug 7, 2:50 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Cherokee, Etowah, St. Clair	70 min
Aug 7, 3:06 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Jefferson, St. Clair, Shelby, Talladega	69 min
Aug 7, 3:14 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	61 min
Aug 7, 3:21 PM CDT	Areal Flood Advisory	BMX	Blount, Cherokee, Etowah	3 hr
Aug 7, 3:28 PM CDT	Special Weather Statement	BMX	Pickens, Tuscaloosa	77 min
Aug 7, 3:59 PM CDT	Special Weather Statement	BMX	Bibb, Clay, Shelby	31 min
Aug 7, 4:12 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne, Randolph	27 min
Aug 7, 4:26 PM CDT	Special Weather Statement	BMX	Randolph	64 min
Aug 7, 4:33 PM CDT	Special Weather Statement	BMX	Bibb, Chilton	57 min
Aug 7, 4:34 PM CDT	Special Weather Statement	BMX	Chambers, Coosa, Tallapoosa	56 min
Aug 7, 4:55 PM CDT	Special Weather Statement	BMX	Tallapoosa	65 min
Aug 7, 5:43 PM CDT	Special Weather Statement	BMX	Hale	32 min
Aug 7, 6:07 PM CDT	Special Weather Statement	BMX	Perry	53 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2023 Every severe thunderstorm warning in 2023

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.