Alert archive / Georgia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 106, NWS Atlanta, GA

May 11, 2002Harris County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 11, 2002, 4:29 PM EDT for Harris County, Georgia. It was in force for 31 min. 1 report 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: May 11, 2002, 4:29 PM EDT (20:29 UTC)
Expired: May 11, 2002, 5:00 PM EDT
In force: 31 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Harris County, GA

The radar

The Atlanta radar (KFFC), 73 km from the middle of the area, began a volume at 20:32 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
May 11, 4:45 PM EDT	Hail 0.75	Waverly Hall, GA	The Harris county 911 center reported dime 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 12:00Z, 8.5 hours before the alert went out and 75 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: 538 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KFFC 112029
SVRATL
GAC145-112100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
429 PM EDT SAT MAY 11 2002

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HARRIS COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 500 PM EDT

* AT 426 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WAVERLY HALL. THE SEVERE THUNDERSTORM WAS
  NEARLY STATIONARY.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...SHILOH AND
  WAVERLY HALL.

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

THIS STORM CONTAINS VERY HEAVY RAIN. EXPECT 1 TO 2 INCHES OF RAIN IN
LESS THAN AN HOUR. THIS CAN CAUSE BRIEF FLOODING OF ROADS.

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 3261 8470 3274 8485 3286 8478 3282 8470
          3272 8469

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:30 PM EDT	Severe Thunderstorm Warning	FFC	Washington	45 min
May 11, 4:15 PM EDT	Severe Thunderstorm Warning	FFC	Washington	30 min
May 11, 4:42 PM EDT	Severe Thunderstorm Warning	FFC	Macon	33 min
May 11, 5:14 PM EDT	Severe Thunderstorm Warning	FFC	Macon	31 min
May 11, 5:33 PM EDT	Severe Thunderstorm Warning	FFC	Talbot	42 min
May 11, 5:39 PM EDT	Severe Thunderstorm Warning	FFC	Crawford	51 min
May 11, 6:10 PM EDT	Severe Thunderstorm Warning	FFC	Peach	35 min
May 11, 6:26 PM EDT	Severe Thunderstorm Warning	FFC	Talbot, Taylor	49 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.