Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 133, NWS Tallahassee, FL

June 20, 1998Decatur County, Seminole County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 20, 1998, 8:02 PM EDT for Decatur County, Seminole County, Georgia. It was in force for 48 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 20, 1998, 8:02 PM EDT (00:02 UTC)
Expired
Jun 20, 1998, 8:50 PM EDT
In force
48 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

Counties Decatur County, GA, Seminole County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.0 hours before the alert went out and 275 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 00:00Z on 1998-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 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 00:00Z on 1998-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
30 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
2405 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
68 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.

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 20, 3:15 PM EDT, 4 hours 47 minutes earlier.

Area forecast discussion, Jun 20, 3:15 PM EDT, 4 hours 47 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
315 PM EDT SAT JUN 20 1998

CONVECTION ALREADY STARTING TO FIRE OVER SE AL AND PANHANDLE WHERE
CAP HAS BEEN BROKEN AND MOISTURE POOLING AND CONVERGENCE IS MORE
PRONOUNCED. FURTHER EAST.. SUBSIDENCE BEHIND S/WV THAT PLAGUED THE
AREA FRIDAY IS HAMPERING CONVECTIVE DEVELOPMENT... PARTICULARLY
OVER SW GA. MESOSCALE FORCING IS DOMINANT TODAY UNLIKE YESTERDAY...
AND ALREADY SEEING SOME ACTIVITY ALG PANHANDLE SEA BREEZE.

SFC RDG AXIS WILL MOVE NORTHWARD SUNDAY ALLOWING WINDS TO BECOME
LIGHT AND VARIABLE AND THE ADDITIONAL SUBSIDENCE SHOULD HELP TO
SUPRESS SHOWER CHANCES SOMEWHAT MORE THAN TODAY. OTHERWISE MOSTLY
ZONAL UPR PATTERN CONTINUES FOR SOUTHEAST STATES... WITH A FEW
WEAK IMPULSES IN THE FLOW MOVING WELL TO OUR NORTH... AND NOT
EXPECTED TO PROVIDE ANY RELIEF FROM THE HEAT.

FWC TEMPS CONT TO BE PRETTY GOOD... AND AGAIN NEAR RECORD HEAT
ON TAP THRU THE WEEKEND. THINK 20-30 PCT POPS ON SUNDAY WOULD BE
ADEQUATE. EVEN WITH INCREASED STABILITY FWC POPS LOOK UNDERDONE.

FACIANE

Nearby

Severe Thunderstorm Warnings in Georgia, 1998Every severe thunderstorm warning in 1998

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.