Alert archive / Georgia / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 78, NWS Atlanta, GA

July 31, 1986Dade County, Walker County, Georgia; Hamilton County, Tennessee

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 31, 1986, 11:46 PM EDT for Dade County, Walker County, Georgia; Hamilton County, Tennessee. It was in force for 59 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 31, 1986, 11:46 PM EDT (03:46 UTC)
Expired: Aug 1, 1986, 12:45 AM EDT
In force: 59 min
Issued by: NWS Atlanta, GA
Area: Whole counties

Counties Dade County, GA, Walker County, GA, Hamilton County, TN

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

Time	Report	Where	Remark
Aug 1, 12:00 AM EDT	Thunderstorm Wind 0	Dade, 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

Nashville Metro, TN (KBNA), launched 00:00Z, 3.8 hours before the alert went out and 177 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1728 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1622 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCHA 010350
SVRCHA
TNC065-GAC083-295-010445-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
1146 PM EDT THU JUL 31 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1245 AM EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTHEAST TENNESSEE...HAMILTON
NORTHWEST GEORGIA...NORTHERN DADE AND NORTHERN WALKER

RADAR INDICATED A LARGE CLUSTER OF SEVERE THUNDERSTORMS WERE
MOVING INTO HAMILTON COUNTY AS WELL AND THE NORTHERN PARTS
OF DADE AND WALKER COUNTIES OF NORTH GEORGIA. LARGE HAIL
SEVERE LIGHTNING AND DAMAGING WINDS CAN BE EXPECTED WITH THESE
STORMS.

 THIS IS A LARGE AND DANGEROUS STORM, PERSONS I
N THE PATH OF THE STORM
 SHOULD TAKE SHELTER IMMEADIATELY.

 STAY TUNED TO THIS STATION FOR MORE INFORMATION

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 6:06 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	69 min
Aug 1, 6:06 PM EDT	Severe Thunderstorm Warning	FFC	Dodge	69 min
Aug 1, 6:58 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	62 min
Jul 31, 11:22 PM EDT	Severe Thunderstorm Warning	FFC	Marion	68 min
Aug 1, 12:36 AM EDT	Severe Thunderstorm Warning	FFC	Marion	69 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1986 Severe Thunderstorm Warnings in Tennessee, 1986 Every 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.