Alert archive / Alabama / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 162, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Apr 24, 1999, 2:51 PM CDT for Pickens County, Alabama. It was in force for 49 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 24, 1999, 2:51 PM CDT (19:51 UTC)
- Expired
- Apr 24, 1999, 3:40 PM CDT
- In force
- 49 min
- Issued by
- NWS Birmingham, AL
- Area
- Whole counties
County Pickens County, AL
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 24, 11:30 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 7.9 hours before the alert went out and 122 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
- 2163 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
In the hours before
Special weather statement, Apr 24, 9:31 AM CDT, 5 hours 20 minutes before
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</html>The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 2:04 PM CDT | Severe Thunderstorm Warning | BMX | Pickens | 51 min |
| Apr 24, 2:31 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 49 min |
| Apr 24, 3:12 PM CDT | Severe Thunderstorm Warning | BMX | Cleburne | 48 min |
| Apr 24, 3:19 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 36 min |
| Apr 24, 4:26 PM CDT | Severe Thunderstorm Warning | BMX | Marengo | 49 min |
| Apr 24, 4:39 PM CDT | Severe Thunderstorm Warning | BMX | St. Clair | 36 min |
| Apr 24, 4:57 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun | 48 min |
| Apr 24, 5:15 PM CDT | Severe Thunderstorm Warning | BMX | Marengo | 35 min |
| Apr 24, 5:55 PM CDT | Flash Flood Warning | BMX | Calhoun | 2 hr |
Nearby
Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999
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.