Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 483, NWS Atlanta, GA

July 16, 1999Washington County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 16, 1999, 4:00 PM EDT for Washington County, Georgia. It was in force for 35 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
Jul 16, 1999, 4:00 PM EDT (20:00 UTC)
Expired
Jul 16, 1999, 4:35 PM EDT
In force
35 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Washington County, GA

What was reported inside it

TimeReportWhereRemark
Jul 16, 4:15 PM EDTThunderstorm WindRiddleville, GAWashington EMC reported trees down on power lines in Riddleville, Sandersville, and Tennille.

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 12:00Z, 8.0 hours before the alert went out and 165 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 1999-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 355 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 1999-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
355 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
29 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 Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 16, 3:10 PM EDTSevere Thunderstorm WarningFFCLaurens35 min
Jul 16, 5:04 PM EDTSevere Thunderstorm WarningFFCWilkinson36 min
Jul 16, 6:22 PM EDTSevere Thunderstorm WarningFFCBibb33 min
Jul 16, 6:34 PM EDTSevere Thunderstorm WarningFFCCrawford31 min
Jul 16, 7:50 PM EDTSevere Thunderstorm WarningFFCSchley35 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.