Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 143, NWS Birmingham, AL

February 27, 1997Lawrence County, Morgan County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Feb 27, 1997, 2:58 AM CST for Lawrence County, Morgan County, Alabama. It was in force for 62 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
Feb 27, 1997, 2:58 AM CST (08:58 UTC)
Expired
Feb 27, 1997, 4:00 AM CST
In force
62 min
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Lawrence County, AL, Morgan County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 27, 12:15 AM CSTTornado WatchSPC6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 9.0 hours before the alert went out and 148 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 00:00Z on 1997-02-27Temperature 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, Birmingham, AL at 00:00Z on 1997-02-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.19395878Sfc1 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
No buoyant parcel
Mixed-layer LCL
612 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
316 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
Feb 27, 1:03 AM CSTSevere Thunderstorm WarningBMXColbert, Lauderdale57 min
Feb 27, 1:28 AM CSTSevere Thunderstorm WarningBMXLamar, Marion47 min
Feb 27, 1:32 AM CSTSevere Thunderstorm WarningBMXFranklin58 min
Feb 27, 1:56 AM CSTSevere Thunderstorm WarningBMXColbert64 min
Feb 27, 2:06 AM CSTSevere Thunderstorm WarningBMXLawrence69 min
Feb 27, 2:30 AM CSTSevere Thunderstorm WarningBMXLimestone60 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1997Every severe thunderstorm warning in 1997

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.