Alert archive / Alabama / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 8, NWS Birmingham, AL

February 21, 1993Etowah County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 21, 1993, 6:46 PM CST for Etowah County, Alabama. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Feb 21, 1993, 6:46 PM CST (00:46 UTC)
Expired
Feb 21, 1993, 7:30 PM CST
In force
44 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Etowah County, AL

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 0.8 hours before the alert went out and 252 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, Athens Municipal, GA at 00:00Z on 1993-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Athens Municipal, GA at 00:00Z on 1993-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 478 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
478 m²/s²
0-3 km storm-relative helicity
577 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

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
Feb 21, 6:02 PM CSTSevere Thunderstorm WarningBMXEtowah43 min
Feb 21, 6:36 PM CSTSevere Thunderstorm WarningBMXCherokee69 min
Feb 21, 7:31 PM CSTSevere Thunderstorm WarningBMXShelby59 min
Feb 21, 8:07 PM CSTSevere Thunderstorm WarningBMXCleburne32 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.