Alert archive / Georgia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 341, NWS Atlanta, GA

August 11, 2000Cherokee County, Forsyth County, Fulton County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 11, 2000, 12:03 AM EDT for Cherokee County, Forsyth County, Fulton County, Georgia. It was in force for 42 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 11, 2000, 12:03 AM EDT (04:03 UTC)
Expired: Aug 11, 2000, 12:45 AM EDT
In force: 42 min
Issued by: NWS Atlanta, GA
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Cherokee County, GA, Forsyth County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 98 km from the middle of the area, began a volume at 04:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 12:15 AM EDT	Hail 0.75	Alpharetta, GA	The public reported dime size hail.
Aug 11, 12:30 AM EDT	Hail 1	Cumming, GA	The public reported quarter size hail.

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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 4.1 hours before the alert went out and 95 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: 1999 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1753 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 90 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 
WUUS52 KFFC 110406
SVRATL
GAC057-117-121-110445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1203 AM EDT FRI AUG 11 2000

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
  NORTH FULTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 1245 AM EDT

* AT 1159 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES NORTHEAST
  OF CUMMING TO 9 MILES NORTHWEST OF ROSWELL...MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE ALPHARETTA AND CUMMING.

LARGE HAIL...DAMAGING WINDS AND TORRENTIAL RAIN ARE EXPECTED WITH
THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER WHILE THE STORM
PASSES.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS AND STAY
AWAeY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.

IF YOU SEE DAMAGE OR LARGE HAIL...CALL THE NATIONAL WEATHER SERVICE
AT 7 7 0 4 8 6 1 1 3 3 AT EXTENSION 2 0 4.

LAT...LON 3431 8423 3411 8453 3397 8427 3431 8398

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:53 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas	37 min
Aug 10, 9:27 PM EDT	Severe Thunderstorm Warning	FFC	Coweta	18 min
Aug 10, 9:45 PM EDT	Severe Thunderstorm Warning	FFC	Coweta	30 min
Aug 10, 11:22 PM EDT	Severe Thunderstorm Warning	FFC	Spalding	28 min
Aug 10, 11:41 PM EDT	Severe Thunderstorm Warning	FFC	Lumpkin	19 min
Aug 10, 11:56 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Hall	49 min
Aug 11, 12:50 AM EDT	Severe Thunderstorm Warning	FFC	Forsyth	30 min
Aug 11, 1:17 AM EDT	Severe Thunderstorm Warning	FFC	Hall	28 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2000 Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.