Alert archive / Alabama / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 105, NWS Birmingham, AL

April 1, 2023Fayette County, Lamar County, Marion County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 1, 2023, 2:49 AM CDT for Fayette County, Lamar County, Marion County, Alabama. It was in force for 56 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
Apr 1, 2023, 2:49 AM CDT (07:49 UTC)
Expired
Apr 1, 2023, 3:45 AM CDT
In force
56 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Fayette County, AL, Lamar County, AL, Marion County, AL

The radar

The Columbus AFB radar (KGWX), 39 km from the middle of the area, began a volume at 07:49 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.

IssuedProductOfficeLasted
Mar 31, 11:59 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 7.8 hours before the alert went out and 130 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2023-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 169 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2023-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
169 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
1105 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
362 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

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 Apr 1, 2:45 AM CDT, 4 minutes earlier.

Area forecast discussion, Apr 1, 2:45 AM CDT, 4 minutes before
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Hazardous weather outlook, Mar 31, 3:38 PM CDT, 11 hours 11 minutes before
Hazardous Weather Outlook
National Weather Service Birmingham AL
338 PM CDT Fri Mar 31 2023

ALZ011>015-017>050-012345-
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-
338 PM CDT Fri Mar 31 2023

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

.DAY ONE...Outlook through Tonight.

Severe storms are likely tonight into early tomorrow morning, with
the highest potential along and north of I-20. Threats include
tornadoes, damaging winds, and quarter size hail. For the southeast
areas, the threats mentioned above are less likely but can not be
ruled out.

Windy conditions are expected tonight. Wind gusts of 35 to 40 mph
are possible outside of thunderstorm activity. The winds will occur
across the northern half of Central Alabama. Lesser wind gusts will
occur south.

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

Isolated severe storms may continue into Saturday morning across
southeast portions of Central Alabama. Damaging winds and an
isolated tornado are possible.

Breezy conditions will continue through midday Saturday with wind
gusts of 35 to 40 mph possible across the northern half of Central
Alabama.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management will be needed
tonight into Saturday morning.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 1:55 AM CDTTornado WarningBMXMarion65 min
Apr 1, 2:44 AM CDTTornado Warning Tornado observedBMXWinston32 min
Apr 1, 3:23 AM CDTSevere Thunderstorm WarningBMXWalker, Winston52 min
Apr 1, 4:07 AM CDTSpecial Weather StatementBMXBlount53 min
Apr 1, 4:13 AM CDTSpecial Weather StatementBMXWalker32 min
Apr 1, 4:44 AM CDTSpecial Weather StatementBMXDeKalb31 min
Apr 1, 4:51 AM CDTSpecial Weather StatementBMXEtowah39 min
Apr 1, 5:11 AM CDTSevere Thunderstorm WarningBMXCalhoun, Cherokee, Etowah49 min
Apr 1, 5:52 AM CDTSpecial Weather StatementBMXCalhoun53 min
Apr 1, 6:11 AM CDTSpecial Weather StatementBMXSt. Clair34 min
Apr 1, 6:55 AM CDTSpecial Weather StatementBMXAutauga, Dallas35 min
Apr 1, 7:27 AM CDTSpecial Weather StatementBMXAutauga, Elmore48 min
Apr 1, 7:45 AM CDTSpecial Weather StatementBMXDallas45 min
Apr 1, 8:04 AM CDTSpecial Weather StatementBMXMacon41 min
Apr 1, 10:12 AM CDTSpecial Weather StatementBMXBullock33 min
Apr 1, 10:42 AM CDTSpecial Weather StatementBMXRussell33 min
Apr 1, 11:52 AM CDTTornado WarningBMXBarbour15 min
Apr 1, 2:45 PM CDTWind AdvisoryBMXFayette, Lamar, Marion, Pickens, Tuscaloosa4 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2023Every 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.