Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 251, NWS Atlanta, GA

June 30, 2007Jefferson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 30, 2007, 7:41 PM EDT for Jefferson County, Georgia. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 30, 2007, 7:41 PM EDT (23:41 UTC)
Expired: Jun 30, 2007, 8:30 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Jefferson County, GA

The radar

The Robins AFB radar (KJGX), 104 km from the middle of the area, began a volume at 23:42 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 30, 2:46 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.7 hours before the alert went out and 200 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: 195 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 15 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 302341
SVRFFC
GAC163-010030-
/O.NEW.KFFC.SV.W.0251.070630T2341Z-070701T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
741 PM EDT SAT JUN 30 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 830 PM EDT

* AT 738 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED 7 MILES SOUTH
  OF STELLAVILLE  THIS STORM WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WRENS
  AND LOUISVILLE.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL 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 3324 8234 3315 8256 3299 8249 3292 8229
      3304 8229 3317 8227

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 8:01 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga	44 min
Jun 29, 8:26 PM EDT	Severe Thunderstorm Warning	FFC	Forsyth, Gwinnett	49 min
Jun 29, 8:40 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga	36 min
Jun 30, 4:34 PM EDT	Severe Thunderstorm Warning	FFC	Dooly	29 min
Jun 30, 6:20 PM EDT	Severe Thunderstorm Warning	FFC	Stewart, Webster	40 min
Jun 30, 6:42 PM EDT	Severe Thunderstorm Warning	FFC	Marion	48 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.