Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 485, NWS Birmingham, AL

August 13, 1999Cullman County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 13, 1999, 8:46 PM CDT for Cullman County, Alabama. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 13, 1999, 8:46 PM CDT (01:46 UTC)
Expired
Aug 13, 1999, 9:50 PM CDT
In force
64 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Cullman County, AL

What was reported inside it

TimeReportWhereRemark
Aug 13, 8:50 PM CDTThunderstorm Wind 60Countywide, ALNumerous trees and power lines were blown down generally from Cullman southeastward to Hanceville. One mobile home had its roof blown off in Hanceville. Cullman, Hanceville, Berlin, Walter, Catalina Point, and Dogwood Point all reported downed trees. The el

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.8 hours before the alert went out and 235 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 00:00Z on 1999-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 994 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 00:00Z on 1999-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
994 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1522 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Aug 13, 7:53 PM CDTSevere Thunderstorm WarningBMXJackson, Madison47 min
Aug 13, 7:57 PM CDTSevere Thunderstorm WarningBMXLimestone, Morgan48 min
Aug 13, 8:37 PM CDTSevere Thunderstorm WarningBMXJackson, Madison, Marshall, Morgan48 min
Aug 13, 9:17 PM CDTSevere Thunderstorm WarningBMXBlount63 min
Aug 14, 2:51 PM CDTSevere Thunderstorm WarningBMXBarbour49 min
Aug 14, 2:51 PM CDTSevere Thunderstorm WarningBMXRussell49 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.