Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 399, NWS Birmingham, AL

July 7, 1999Cleburne County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 7, 1999, 4:46 PM CDT for Cleburne County, Alabama. It was in force for 44 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
Jul 7, 1999, 4:46 PM CDT (21:46 UTC)
Expired
Jul 7, 1999, 5:30 PM CDT
In force
44 min
Issued by
NWS Birmingham, AL
Area
Whole counties

County Cleburne County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 100 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 12:00Z on 1999-07-07Temperature 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, Peachtre/Fal Fld, GA at 12:00Z on 1999-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1082 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
45 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
Jul 6, 8:26 PM CDTFlash Flood WarningBMXColbert, Lauderdale2 hr
Jul 7, 2:30 PM CDTFlash Flood WarningBMXJefferson, Shelby90 min
Jul 7, 2:48 PM CDTFlash Flood WarningBMXCoosa, Tallapoosa87 min
Jul 7, 3:18 PM CDTFlash Flood WarningBMXAutauga92 min
Jul 7, 4:54 PM CDTFlash Flood WarningBMXAutauga61 min
Jul 7, 4:56 PM CDTSevere Thunderstorm WarningBMXHale, Perry49 min
Jul 7, 5:22 PM CDTTornado WarningBMXMarengo, Perry48 min
Jul 7, 6:00 PM CDTSevere Thunderstorm WarningBMXMarengo, Sumter45 min
Jul 7, 6:07 PM CDTSevere Thunderstorm WarningBMXCalhoun48 min
Jul 7, 6:11 PM CDTSevere Thunderstorm WarningBMXFayette, Walker49 min
Jul 7, 6:17 PM CDTSevere Thunderstorm WarningBMXDeKalb48 min
Jul 7, 6:57 PM CDTSevere Thunderstorm WarningBMXJackson48 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.