Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 133, NWS Birmingham, AL

September 23, 1993Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Sep 23, 1993, 5:59 PM CDT for Winston County, Alabama. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Sep 23, 1993, 5:59 PM CDT (22:59 UTC)
Expired
Sep 23, 1993, 6:38 PM CDT
In force
39 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Winston County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.0 hours before the alert went out and 231 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, Nashville Metro, TN at 12:00Z on 1993-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Nashville Metro, TN at 12:00Z on 1993-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
595 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
232 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
Sep 23, 3:59 PM CDTSevere Thunderstorm WarningBMXLauderdale, Limestone61 min
Sep 23, 5:59 PM CDTSevere Thunderstorm WarningBMXWalker61 min
Sep 23, 6:21 PM CDTSevere Thunderstorm WarningBMXTuscaloosa69 min
Sep 23, 6:27 PM CDTSevere Thunderstorm WarningBMXCullman48 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1993Every severe thunderstorm warning in 1993

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.