Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 349, NWS Atlanta, GA

June 25, 1999Toombs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 25, 1999, 4:00 PM EDT for Toombs County, Georgia. It was in force for 20 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
Jun 25, 1999, 4:00 PM EDT (20:00 UTC)
Expired
Jun 25, 1999, 4:20 PM EDT
In force
20 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Toombs County, GA

The radar

The Robins AFB radar (KJGX), 114 km from the middle of the area, began a volume at 20:02 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.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.0 hours before the alert went out and 190 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, Jacksonville, FL at 12:00Z on 1999-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 257 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, Jacksonville, FL at 12:00Z on 1999-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 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
257 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KATL 252001 RRA
SVRATL
GAC279-252020-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
400 PM EDT FRI JUN 25 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN TOOMBS IN SOUTHEASTERN GEORGIA

* UNTIL 420 PM EDT

* AT 359 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR  4 MILES NORTHWEST OF OHOOPEE... MOVING EAST AT 15 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   OHOOPEE                     AROUND 410 PM EDT...

DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMAGE OR
LARGE< HAIL...CALL THE NATIONAL WEATHER SERVICE AT 770-486-1133 AT
EXTENSION 2 0 4.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 24, 10:04 PM EDTSevere Thunderstorm WarningFFCHall36 min
Jun 24, 10:21 PM EDTSevere Thunderstorm WarningFFCLumpkin, White34 min
Jun 24, 10:34 PM EDTSevere Thunderstorm WarningFFCBanks, Jackson46 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; radar from the NEXRAD Level II archive.