Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 71, NWS Tallahassee, FL

June 4, 1999Brooks County, Thomas County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 4, 1999, 9:56 PM EDT for Brooks County, Thomas County, Georgia. It was in force for 29 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
Jun 4, 1999, 9:56 PM EDT (01:56 UTC)
Expired
Jun 4, 1999, 10:25 PM EDT
In force
29 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

Counties Brooks County, GA, Thomas County, GA

The radar

The Moody AFB radar (KVAX), 71 km from the middle of the area, began a volume at 01:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 4, 10:02 PM EDTThunderstorm WindThomasville, GAFew large trees down across Summer Hill Rd reported by the Thomas County EMA.

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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 1.9 hours before the alert went out and 73 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, Tallahassee Rgnl, FL at 00:00Z on 1999-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1282 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, Tallahassee Rgnl, FL at 00:00Z on 1999-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
1282 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1936 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 4, 8:15 PM EDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jun 4, 8:15 PM EDT, 1 hour 41 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
815 PM EDT FRI JUN 4 1999

VAPOR IMAGES SHOW NEARLY SOLID LINE OF SHOWERS AND THUNDERSTORMS
ASSOCIATED WITH UPPER VORT LOBE MOVING S INTO NRN CWA AT THIS TIME.
EXPECT THIS ACTIVITY TO SLOWLY WEAKEN TONIGHT...WITH REMNANTS
REACHING GULF AROUND OR SHORTLY AFTER MIDNIGHT. SEVERE CONVECTION
CURRENTLY NOTED ALONG SEA BREEZE BOUNDARY OVER FRANKLIN COUNTY AND
IN ISOLATED PARTS OF SW GA IS SLOWLY WEAKENING AT THIS TIME. EXPECT
OVERALL SEVERE THREAT TO DECREASE WITH LOSS OF INSOLATION...AND
RADAR ALREADY CONFIRMS THIS THINKING WITH GRADUALLY DECREASING
REFLECTIVITIES AND AREAL COVERAGE. WILL RAISE POPS FOR FL BIG BEND
BUT LEAVE OUT MENTIOLN OF SEVERE. HIGHER POPS JUSTIFIED OVER SE AL
AND SW GA GIVEN CURRENT RADAR SCENARIO.

TJT

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 4, 8:56 PM EDTSevere Thunderstorm WarningTAELeon49 min
Jun 4, 9:42 PM EDTSevere Thunderstorm WarningTAEGadsden, Jackson48 min
Jun 4, 10:01 PM EDTSevere Thunderstorm WarningTAEJefferson, Leon49 min
Jun 4, 10:45 PM EDTSevere Thunderstorm WarningTAEJefferson, Leon, Liberty, Wakulla60 min
Jun 4, 10:45 PM EDTSevere Thunderstorm WarningTAEFranklin, Gulf60 min
Jun 5, 12:12 PM EDTSevere Thunderstorm WarningTAELafayette, Madison63 min
Jun 5, 5:22 PM EDTSevere Thunderstorm WarningTAEWalton48 min
Jun 4, 8:49 PM EDTTornado WarningTAEDougherty, Worth31 min
Jun 4, 9:23 PM EDTSevere Thunderstorm WarningTAEColquitt, Cook, Mitchell32 min
Jun 4, 9:36 PM EDTSevere Thunderstorm WarningTAEGrady, Thomas44 min
Jun 4, 9:36 PM EDTSevere Thunderstorm WarningTAEBrooks44 min
Jun 4, 9:56 PM EDTSevere Thunderstorm WarningTAEGrady29 min
Jun 5, 4:42 PM EDTSevere Thunderstorm WarningTAEWorth48 min
Jun 5, 4:35 PM EDTSevere Thunderstorm WarningTAEGeneva50 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; radar from the NEXRAD Level II archive.