Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 676, NWS Atlanta, GA

August 25, 1999Troup County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 25, 1999, 5:06 PM EDT for Troup County, Georgia. It was in force for 34 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
Aug 25, 1999, 5:06 PM EDT (21:06 UTC)
Expired
Aug 25, 1999, 5:40 PM EDT
In force
34 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Troup County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.1 hours before the alert went out and 62 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 1999-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 541 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 12:00Z on 1999-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
541 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
754 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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 Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 5:42 PM EDTSevere Thunderstorm WarningFFCNewton33 min
Aug 25, 5:57 PM EDTSevere Thunderstorm WarningFFCMorgan33 min
Aug 25, 6:04 PM EDTSevere Thunderstorm WarningFFCCobb, Douglas36 min
Aug 25, 6:11 PM EDTSevere Thunderstorm WarningFFCNewton19 min
Aug 25, 6:30 PM EDTSevere Thunderstorm WarningFFCGreene, Morgan35 min
Aug 25, 7:37 PM EDTSevere Thunderstorm WarningFFCDeKalb33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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.