Alert archive / Georgia / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 4, NWS Atlanta, GA

March 13, 1986Walton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 13, 1986, 8:37 AM EST for Walton County, Georgia. It was in force for 68 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
Mar 13, 1986, 8:37 AM EST (13:37 UTC)
Expired
Mar 13, 1986, 9:45 AM EST
In force
68 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Walton County, GA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Mar 13, 8:40 AM ESTThunderstorm Wind 51Walton, GA

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 12:00Z, 1.6 hours before the alert went out and 44 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, Athens Municipal, GA at 12:00Z on 1986-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 391 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, Athens Municipal, GA at 12:00Z on 1986-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 373 square meters per square second.19395878Sfc1 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
391 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
464 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
373 m²/s²
0-3 km storm-relative helicity
371 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAHN 131337
SVRAHN
GAC297-131445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ATHENS GA
837 AM EST THU MAR 13 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 945 AM EST FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHEAST GEORGIA...WALTON

AT 835AM A SEVERE THUNDERSTORM WAS APPROCHING WALTON COUNTY
FROM THE SOUTHWEST... THIS STORM HAS ALREADY BLOWN DOWN
TREES..

 A SEVERE THUNDERSTORM IS DEFINED AS HAVING WINDS AT LEAST 58 MPH
 AND/OR HAIL 3/4 INCH IN DIAMETER OR LARGER. IF THREATENING
 WEATHER APPROACHES...TAKE IMMEDIATE PRECAUTIONS.

 IF DARK THREATENING CLOUDS OR LOUD ROARING SOUNDS APPROACH YOUR
 AREA...SEEK SHELTER IMMEDIATELY. A BASEMENT OR INTERIOR HALLWAY
 IS THE SAFEST PLACE. LISTEN TO WEATHER RADIO FOR THE LATEST
 BULLETINS.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 13, 8:49 AM ESTSevere Thunderstorm WarningFFCBarrow, Jackson56 min
Mar 13, 9:34 AM ESTSevere Thunderstorm WarningFFCMorgan26 min
Mar 13, 12:03 PM ESTSevere Thunderstorm WarningFFCCrawford, Monroe57 min
Mar 13, 3:11 PM ESTSevere Thunderstorm WarningFFCTreutlen64 min
Mar 13, 4:03 PM ESTSevere Thunderstorm WarningFFCDodge57 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1986Every severe thunderstorm warning in 1986

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.