Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 345, NWS Atlanta, GA

September 10, 1990Fannin County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 10, 1990, 1:14 AM EDT for Fannin County, Georgia. It was in force for 46 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: Sep 10, 1990, 1:14 AM EDT (05:14 UTC)
Expired: Sep 10, 1990, 2:00 AM EDT
In force: 46 min
Issued by: NWS Atlanta, GA
Area: Whole counties

County Fannin 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
Sep 10, 1:15 AM EDT	Thunderstorm Wind 0	Fannin, 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 00:00Z, 5.2 hours before the alert went out and 138 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: 1884 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1274 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 76 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 100514
SVRATL
GAC111-100600-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ATLANTA  GA
114 AM EDT MON SEP 10 1990
 
THE NATIONAL WEATHER SERVICE IN ATLANTA  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  200 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...FANNIN COUNTY
 
AT 115 AM WEATHER SERVICE RADAR INDICATES A THUNDERSTORM IN FANNIN
COUNTY 5 MILES EAST OF BLUE RIDGE. THE STORM IS MOVING EAST AT 15 MPH.
THIS STORM HAS BEEN ACCOMPANIED BY FREQUENT LIGHTNING...HIGH WINDS
AND BRIEF HEAVY RAIN. REPORTS OF POWER OUTAGES AND HEAVY RAIN HAVE
ACCOMPANIED THIS STORM.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
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 FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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.

In the hours before

Special weather statement, Sep 10, 12:42 AM EDT, 32 minutes before

GAZ001-002-100600

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
1245 AM EDT MON SEP 10 1990

...THUNDERSTORMS OVER NORTHWEST GEORGIA...

AT 1245 AM WEATHER RADAR INDICATED THUNDERSTORMS OVER EXTREME NORTHWEST
GEORGIA. THE STRONGEST STORMS WERE LOCATED IN MURRAY COUNTY 10 MILES
EAST OF CHATSWORTH AND IN GILMER COUNTY 10 MILES NORTH OF ELLIJAY.
THESE STORMS ARE MOVING EAST NEAR 15 MPH. THEY HAVE BEEN ACCOMPANIED BY
FREQUENT LIGHTNING AND HIGH WINDS. A ROOF WAS BLOWN OFF A TEXTILE BUILDING
NEAR CHATSHORTH.

THESE STORMS MAY BE ACCOMPANIED BY FREQUENT LIGHTNONG...HIGH WINDS AND
SOME HAIL.

THUNDERSTORMS WILL CONTINUE OVER THIS AREA FOR THE NEXT SEVERAL HOURS.
REIDENTS IN NORTHWEST GEORGIA SHOULD STAY ON THE ALERT FOR FURTHER
INFORMATION ON THESE STORMS FROM THE MEDIA OR NOAA WEATHER RADIO.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 10, 4:42 AM EDT	Severe Thunderstorm Warning	FFC	Fulton	48 min
Sep 10, 2:44 PM EDT	Severe Thunderstorm Warning	FFC	Twiggs	46 min
Sep 10, 3:06 PM EDT	Severe Thunderstorm Warning	FFC	Jones	69 min
Sep 10, 3:13 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Houston	62 min
Sep 10, 5:26 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee	34 min
Sep 10, 5:41 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	34 min
Sep 10, 5:52 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb	38 min
Sep 10, 6:03 PM EDT	Severe Thunderstorm Warning	FFC	Clayton	27 min
Sep 10, 6:28 PM EDT	Severe Thunderstorm Warning	FFC	Columbia, Richmond	47 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1990 Every severe thunderstorm warning in 1990

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.