Alert archive / Georgia / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 101, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Nov 20, 1986, 9:13 AM EST for DeKalb County, Henry County, Rockdale County, Georgia. It was in force for 62 min. 3 reports 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
- Nov 20, 1986, 9:13 AM EST (14:13 UTC)
- Expired
- Nov 20, 1986, 10:15 AM EST
- In force
- 62 min
- Issued by
- NWS Atlanta, GA
- Area
- Whole counties
Counties DeKalb County, GA, Henry County, GA, Rockdale 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 20, 9:30 AM EST | Thunderstorm Wind 0 | Rockdale, GA | |
| Nov 20, 10:15 AM EST | Thunderstorm Wind 0 | De Kalb, GA | |
| Nov 20, 10:15 AM EST | Thunderstorm Wind 0 | Henry, 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, 2.2 hours before the alert went out and 85 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 594 m²/s²
- 0-3 km storm-relative helicity
- 760 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAAOO KATL 201413
SVRATL
GAC089-117-135-151-247-201515-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ATLANTA GA
913 AM EST THU NOV 20 1986
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1015 AM EST FOR PEOPLE IN THE FOLLOWING COUNTIES:
IN NORTHWEST GEORGIA
..DEKALB..FORSYTH..GWINNETT
..HENRY..ROCKDALE
THE LINE OF SEVERE THUNDERSTORMS CONTINUES TO RACE EAST.
WINDS IN EXCESS OF 50 MPH HAVE BEEN RECORDED AT THE NATIONAL WEATHER
SERVICE.
THE THUNDERSTORMS ARE MOVING TO EAST AT 55 MPH.
THERE HAS BEEN CONFIRMED TREE AND POWER LINE DAMAGE.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH,
DESTRUCTIVE HAIL, DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS 1FLOOD ROADS QUICKLY SO DON'T DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 8:51 AM EST | Severe Thunderstorm Warning | FFC | Douglas, Fulton | 54 min |
| Nov 20, 8:51 AM EST | Severe Thunderstorm Warning | FFC | Paulding | 54 min |
| Nov 20, 9:04 AM EST | Severe Thunderstorm Warning | FFC | Cobb, Fulton | 56 min |
| Nov 20, 9:13 AM EST | Severe Thunderstorm Warning | FFC | Forsyth, Gwinnett | 62 min |
| Nov 20, 9:40 AM EST | Severe Thunderstorm Warning | FFC | Barrow, Walton | 60 min |
| Nov 20, 9:40 AM EST | Severe Thunderstorm Warning | FFC | Newton | 60 min |
| Nov 20, 10:05 AM EST | Severe Thunderstorm Warning | FFC | Clarke, Oconee | 35 min |
| Nov 20, 10:05 AM EST | Severe Thunderstorm Warning | FFC | Morgan | 35 min |
| Nov 20, 10:30 AM EST | Severe Thunderstorm Warning | FFC | Greene, Oglethorpe, Taliaferro | 20 min |
| Nov 20, 12:25 PM EST | Severe Thunderstorm Warning | FFC | Bibb, Houston, Twiggs | 35 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.