Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 385, NWS Birmingham, AL

June 24, 1999Pickens County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 24, 1999, 2:43 PM CDT for Pickens County, Alabama. It was in force for 32 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
Jun 24, 1999, 2:43 PM CDT (19:43 UTC)
Expired
Jun 24, 1999, 3:15 PM CDT
In force
32 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Pickens County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.7 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 1999-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 778 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, Birmingham, AL at 12:00Z on 1999-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 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
778 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.7

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
Jun 24, 2:03 AM CDTFlash Flood WarningBMXMarengo2 hr
Jun 24, 2:09 AM CDTSevere Thunderstorm WarningBMXMarengo46 min
Jun 24, 2:40 PM CDTSevere Thunderstorm WarningBMXTuscaloosa35 min
Jun 24, 3:05 PM CDTSevere Thunderstorm WarningBMXBibb, Hale65 min
Jun 24, 3:05 PM CDTSevere Thunderstorm WarningBMXGreene65 min
Jun 24, 3:41 PM CDTSevere Thunderstorm WarningBMXPerry64 min
Jun 24, 4:05 PM CDTSevere Thunderstorm WarningBMXChilton65 min
Jun 24, 4:29 PM CDTSevere Thunderstorm WarningBMXAutauga, Dallas61 min
Jun 24, 5:56 PM CDTSevere Thunderstorm WarningBMXLowndes64 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.