Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 294, NWS Atlanta, GA

July 20, 2007Lamar County, Upson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 20, 2007, 2:27 PM EDT for Lamar County, Upson County, Georgia. It was in force for 48 min. 5 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 20, 2007, 2:27 PM EDT (18:27 UTC)
Expired: Jul 20, 2007, 3:15 PM EDT
In force: 48 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

Counties Lamar County, GA, Upson County, GA

The radar

The Atlanta radar (KFFC), 55 km from the middle of the area, began a volume at 18:30 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 20, 2:45 PM EDT	TSTM WND DMG	Thomaston, GA	FOUR TREES DOWN WITH SOME BLOCKING ROADWAYS.
Jul 20, 2:45 PM EDT	HAIL 0.5	3 N Thomaston, GA
Jul 20, 2:50 PM EDT	TSTM WND DMG	3 W Thomaston, GA	APPROXIMATELY 10 TO 15 TREES DOWNED NEAR HIGHWAY 74 AND STATE PARK ROAD.
Jul 20, 2:50 PM EDT	TSTM WND DMG	Barnesville, GA	APPROXIMATELY 10 TREES DOWN AND SOME POWERLINES DOWN COUNTYWIDE.
Jul 20, 3:00 PM EDT	TSTM WND DMG	Thomaston, GA	ONE TREE DOWN OFF OF HARP ROAD JUST NORTH OF THE THOMASTON CITY LIMITS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 20, 11:21 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 20, 1:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.5 hours before the alert went out and 52 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: 652 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 42 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 201827
SVRFFC
GAC171-293-201915-
/O.NEW.KFFC.SV.W.0294.070720T1827Z-070720T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
227 PM EDT FRI JUL 20 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAMAR COUNTY IN WEST CENTRAL GEORGIA
  UPSON COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 315 PM EDT

* AT 226 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 13 MILES
  NORTHWEST OF PIEDMONT...MOVING SOUTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SPREWELL BLUFF STATE PARK...CHAPPEL...BARNESVILLE...THOMASTON...
  GOGGINS AND JOHNSTONVILLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR CENTRAL GEORGIA.

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 3277 8436 3284 8442 3283 8444 3296 8453
      3298 8427 3304 8423 3318 8424 3317 8413
      3320 8412 3320 8404 3294 8405 3291 8413
      3281 8413 3270 8420

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 12:33 PM EDT	Severe Thunderstorm Warning	FFC	Haralson	57 min
Jul 20, 12:47 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	43 min
Jul 20, 1:22 PM EDT	Severe Thunderstorm Warning	FFC	Heard	23 min
Jul 20, 1:26 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Coweta	64 min
Jul 20, 1:36 PM EDT	Severe Thunderstorm Warning	FFC	Douglas, Fulton	39 min
Jul 20, 1:40 PM EDT	Severe Thunderstorm Warning	FFC	Fayette, Spalding	65 min
Jul 20, 1:44 PM EDT	Severe Thunderstorm Warning	FFC	Heard, Meriwether, Troup	61 min
Jul 20, 2:06 PM EDT	Severe Thunderstorm Warning	FFC	Pike	54 min
Jul 20, 2:08 PM EDT	Severe Thunderstorm Warning	FFC	Pike	52 min
Jul 20, 2:41 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	34 min
Jul 20, 2:58 PM EDT	Severe Thunderstorm Warning	FFC	Monroe	47 min
Jul 20, 3:00 PM EDT	Severe Thunderstorm Warning	FFC	Crawford, Talbot, Taylor	60 min
Jul 20, 3:18 PM EDT	Severe Thunderstorm Warning	FFC	Bibb	57 min
Jul 20, 3:29 PM EDT	Severe Thunderstorm Warning	FFC	Houston, Peach	46 min
Jul 20, 3:39 PM EDT	Severe Thunderstorm Warning	FFC	Twiggs	51 min
Jul 20, 3:55 PM EDT	Severe Thunderstorm Warning	FFC	Wilkinson	50 min
Jul 20, 4:09 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Laurens	66 min
Jul 20, 4:20 PM EDT	Severe Thunderstorm Warning	FFC	Dodge	55 min
Jul 20, 4:26 PM EDT	Severe Thunderstorm Warning	FFC	Johnson, Washington	64 min
Jul 20, 4:50 PM EDT	Severe Thunderstorm Warning	FFC	Montgomery, Treutlen, Wheeler	55 min
Jul 20, 4:58 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel	62 min
Jul 20, 5:10 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Wilcox	21 min
Jul 20, 5:21 PM EDT	Severe Thunderstorm Warning	FFC	Toombs	39 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.