Alert archive / Alabama / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 304, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Jul 29, 2023, 4:23 PM CDT for Chilton County, Alabama. It was in force for 21 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 29, 2023, 4:23 PM CDT (21:23 UTC)
- Expired
- Jul 29, 2023, 4:44 PM CDT
- In force
- 21 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Chilton County, AL
The radar
The Birmingham radar (KBMX), 36 km from the middle of the area, began a volume at 21:25 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, 9.4 hours before the alert went out and 37 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
- 1335 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1141 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 2:38 PM CDT | Special Weather Statement | BMX | Coosa | 37 min |
| Jul 29, 3:01 PM CDT | Special Weather Statement | BMX | Jefferson | 29 min |
| Jul 29, 3:03 PM CDT | Special Weather Statement | BMX | Coosa | 27 min |
| Jul 29, 3:06 PM CDT | Special Weather Statement | BMX | Chilton | 24 min |
| Jul 29, 3:18 PM CDT | Special Weather Statement | BMX | Coosa | 42 min |
| Jul 29, 3:25 PM CDT | Severe Thunderstorm Warning | BMX | Coosa | 20 min |
| Jul 29, 3:48 PM CDT | Special Weather Statement | BMX | Bibb | 27 min |
| Jul 29, 3:52 PM CDT | Special Weather Statement | BMX | Shelby | 38 min |
| Jul 29, 4:05 PM CDT | Special Weather Statement | BMX | Chilton | 40 min |
| Jul 29, 4:17 PM CDT | Special Weather Statement | BMX | Tuscaloosa | 28 min |
| Jul 29, 4:18 PM CDT | Special Weather Statement | BMX | Bibb | 27 min |
| Jul 29, 4:46 PM CDT | Special Weather Statement | BMX | Russell | 29 min |
| Jul 29, 4:51 PM CDT | Special Weather Statement | BMX | Bibb | 24 min |
| Jul 29, 4:56 PM CDT | Special Weather Statement | BMX | Randolph | 34 min |
| Jul 29, 5:15 PM CDT | Special Weather Statement | BMX | Russell | 30 min |
| Jul 29, 5:29 PM CDT | Areal Flood Advisory | BMX | Russell | 3 hr |
| Jul 29, 5:45 PM CDT | Special Weather Statement | BMX | Elmore | 30 min |
| Jul 29, 5:47 PM CDT | Special Weather Statement | BMX | Russell | 28 min |
| Jul 29, 6:02 PM CDT | Special Weather Statement | BMX | Lee | 28 min |
| Jul 29, 6:11 PM CDT | Special Weather Statement | BMX | Walker | 19 min |
| Jul 29, 6:17 PM CDT | Special Weather Statement | BMX | Calhoun | 28 min |
| Jul 29, 6:39 PM CDT | Special Weather Statement | BMX | Russell | 36 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.