Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 289, NWS Atlanta, GA

July 21, 2002Coweta County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 21, 2002, 5:50 PM EDT for Coweta County, Georgia. It was in force for 40 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 21, 2002, 5:50 PM EDT (21:50 UTC)
Expired: Jul 21, 2002, 6:30 PM EDT
In force: 40 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Coweta County, GA

The radar

The Atlanta radar (KFFC), 28 km from the middle of the area, began a volume at 21:50 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
Jul 21, 5:50 PM EDT	Hail 0.75	Newnan, GA	The public reported that hail, the size of nickels, fell for up to 10 minutes duration. An amateur radio operator reported dime size hail.
Jul 21, 6:05 PM EDT	Thunderstorm Wind	Newnan, GA	The Newnan Times Herald reported that several large trees were blown down in Newnan, including a 100 foot Poplar tree. Damage was most extensive in the Bridgewater subdivision. Trees were also down on power lines in Senoia.

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 12:00Z, 9.8 hours before the alert went out and 34 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: 1664 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 935 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 7 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.

848 
WUUS52 KFFC 212150
SVRATL
GAC077-212230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
550 PM EDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COWETA COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 630 PM EDT

* AT 547 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERE THUNDERSTORMS FROM 7 MILES NORTHEAST OF NEWNAN TO
  MORELAND...MOVING WEST AT 15 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...MORELAND...
  NEWNAN...SHARPSBURG AND TURIN.

HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED 
IN THE WARNED AREA.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3343 8500 3345 8497 3343 8494 3351 8485
          3351 8463 3323 8460 3325 8493

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:15 PM EDT	Severe Thunderstorm Warning	FFC	Washington	30 min
Jul 21, 2:19 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Jefferson	26 min
Jul 21, 2:27 PM EDT	Severe Thunderstorm Warning	FFC	Hancock, Washington	33 min
Jul 21, 2:32 PM EDT	Severe Thunderstorm Warning	FFC	Upson	28 min
Jul 21, 3:03 PM EDT	Severe Thunderstorm Warning	FFC	Macon, Peach	27 min
Jul 21, 5:10 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	35 min
Jul 21, 5:36 PM EDT	Severe Thunderstorm Warning	FFC	Toombs	39 min
Jul 21, 7:15 PM EDT	Severe Thunderstorm Warning	FFC	Paulding	30 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2002 Every severe thunderstorm warning in 2002

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.