Alert archive / Alabama / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 301, NWS Birmingham, AL

July 28, 2023Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 28, 2023, 1:58 PM CDT for Jefferson County, Alabama. It was in force for 25 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
Jul 28, 2023, 1:58 PM CDT (18:58 UTC)
Expired
Jul 28, 2023, 2:23 PM CDT
In force
25 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 44 km from the middle of the area, began a volume at 19:01 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 7.0 hours before the alert went out and 223 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, Peachtre/Fal Fld, GA at 12:00Z on 2023-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 700 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, Peachtre/Fal Fld, GA at 12:00Z on 2023-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
700 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1263 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 8:58 PM CDTSpecial Weather StatementBMXChambers32 min
Jul 28, 3:30 AM CDTHeat AdvisoryBMXChambers, Clay, Cleburne, Lee, Randolph, Russell61 hr
Jul 28, 12:25 PM CDTSpecial Weather StatementBMXEtowah35 min
Jul 28, 12:32 PM CDTSpecial Weather StatementBMXCherokee28 min
Jul 28, 12:58 PM CDTSpecial Weather StatementBMXJefferson32 min
Jul 28, 1:17 PM CDTSpecial Weather StatementBMXMarengo28 min
Jul 28, 1:18 PM CDTSpecial Weather StatementBMXDeKalb27 min
Jul 28, 1:30 PM CDTSpecial Weather StatementBMXCleburne30 min
Jul 28, 1:48 PM CDTSpecial Weather StatementBMXJefferson27 min
Jul 28, 2:04 PM CDTSpecial Weather StatementBMXEtowah26 min
Jul 28, 2:06 PM CDTSpecial Weather StatementBMXMarengo24 min
Jul 28, 2:11 PM CDTSpecial Weather StatementBMXCoosa19 min
Jul 28, 2:12 PM CDTSpecial Weather StatementBMXCalhoun33 min
Jul 28, 2:16 PM CDTSpecial Weather StatementBMXBibb29 min
Jul 28, 2:31 PM CDTSevere Thunderstorm WarningBMXBibb, Tuscaloosa27 min
Jul 28, 2:43 PM CDTSpecial Weather StatementBMXDallas32 min
Jul 28, 3:00 PM CDTSpecial Weather StatementBMXTuscaloosa30 min
Jul 28, 3:11 PM CDTSpecial Weather StatementBMXBlount34 min
Jul 28, 3:14 PM CDTSpecial Weather StatementBMXPerry31 min
Jul 28, 3:23 PM CDTSpecial Weather StatementBMXChilton37 min
Jul 28, 3:39 PM CDTSpecial Weather StatementBMXTuscaloosa36 min
Jul 28, 3:49 PM CDTSpecial Weather StatementBMXTalladega26 min
Jul 28, 4:08 PM CDTSpecial Weather StatementBMXDallas22 min
Jul 28, 4:15 PM CDTSpecial Weather StatementBMXTuscaloosa30 min
Jul 28, 4:33 PM CDTSpecial Weather StatementBMXHale27 min
Jul 28, 4:50 PM CDTSpecial Weather StatementBMXMarion25 min
Jul 28, 5:35 PM CDTSpecial Weather StatementBMXMontgomery25 min
Jul 28, 6:22 PM CDTSpecial Weather StatementBMXRandolph23 min

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.