Alert archive / Alabama / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 14, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Feb 17, 1998, 2:37 AM CST for Chilton County, Alabama. It was in force for 18 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 17, 1998, 2:37 AM CST (08:37 UTC)
- Expired
- Feb 17, 1998, 2:55 AM CST
- In force
- 18 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Chilton County, AL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 17, 3:00 AM CST | Hail 0.88 | Thorsby, AL | Nickel size hail was reported just south of Thorsby. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 17, 2:00 AM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 8.6 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
- 572 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 635 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 255 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 12:48 AM CST | Severe Thunderstorm Warning | BMX | Dallas | 47 min |
| Feb 17, 1:13 AM CST | Severe Thunderstorm Warning | BMX | Chilton | 47 min |
| Feb 17, 1:19 AM CST | Severe Thunderstorm Warning | BMX | Autauga | 46 min |
| Feb 17, 1:45 AM CST | Tornado Warning | BMX | Autauga | 50 min |
| Feb 17, 1:49 AM CST | Tornado Warning | BMX | Chilton | 56 min |
| Feb 17, 2:18 AM CST | Severe Thunderstorm Warning | BMX | Shelby | 47 min |
| Feb 17, 2:22 AM CST | Severe Thunderstorm Warning | BMX | Coosa, Talladega | 63 min |
| Feb 17, 2:31 AM CST | Tornado Warning | BMX | Coosa, Talladega | 64 min |
| Feb 17, 3:12 AM CST | Severe Thunderstorm Warning | BMX | Chilton | 48 min |
| Feb 17, 3:36 AM CST | Severe Thunderstorm Warning | BMX | Calhoun | 64 min |
| Feb 17, 3:44 AM CST | Severe Thunderstorm Warning | BMX | Autauga, Lowndes | 46 min |
| Feb 17, 3:54 AM CST | Severe Thunderstorm Warning | BMX | Coosa | 46 min |
| Feb 17, 4:03 AM CST | Severe Thunderstorm Warning | BMX | Tallapoosa | 47 min |
| Feb 17, 4:19 AM CST | Severe Thunderstorm Warning | BMX | Clay | 51 min |
| Feb 17, 4:37 AM CST | Severe Thunderstorm Warning | BMX | Cleburne | 63 min |
| Feb 17, 4:44 AM CST | Severe Thunderstorm Warning | BMX | Randolph | 51 min |
| Feb 17, 5:04 AM CST | Severe Thunderstorm Warning | BMX | Tallapoosa | 46 min |
| Feb 17, 5:25 AM CST | Severe Thunderstorm Warning | BMX | Chambers | 50 min |
| Feb 17, 6:14 AM CST | Severe Thunderstorm Warning | BMX | Chambers | 31 min |
| Feb 17, 4:08 PM CST | Severe Thunderstorm Warning | BMX | Calhoun, Cleburne | 62 min |
| Feb 17, 4:08 PM CST | Severe Thunderstorm Warning | BMX | Clay, Randolph | 62 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 1998Every severe thunderstorm warning in 1998
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.