Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 281, NWS Birmingham, AL

May 22, 1999Bibb County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 22, 1999, 3:20 PM CDT for Bibb County, Alabama. It was in force for 35 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
May 22, 1999, 3:20 PM CDT (20:20 UTC)
Expired
May 22, 1999, 3:55 PM CDT
In force
35 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Bibb County, AL

The radar

The Birmingham radar (KBMX), 38 km from the middle of the area, began a volume at 20:21 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, 8.3 hours before the alert went out and 248 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 1999-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 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 1999-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
173 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1256 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
May 22, 2:09 PM CDTSevere Thunderstorm WarningBMXCullman31 min
May 22, 2:13 PM CDTSevere Thunderstorm WarningBMXBlount47 min
May 22, 2:36 PM CDTSevere Thunderstorm WarningBMXMarshall49 min
May 22, 2:40 PM CDTSevere Thunderstorm WarningBMXJefferson50 min
May 22, 2:54 PM CDTSevere Thunderstorm WarningBMXEtowah46 min
May 22, 3:37 PM CDTSevere Thunderstorm WarningBMXShelby48 min
May 22, 3:39 PM CDTSevere Thunderstorm WarningBMXJefferson31 min
May 22, 4:29 PM CDTSevere Thunderstorm WarningBMXSt. Clair, Talladega31 min

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; radar from the NEXRAD Level II archive.