Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 69, NWS Atlanta, GA

March 18, 2013Jefferson County, Washington County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 18, 2013, 8:26 PM EDT for Jefferson County, Washington County, Georgia. It was in force for 34 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: Mar 18, 2013, 8:26 PM EDT (00:26 UTC)
Expired: Mar 18, 2013, 9:00 PM EDT
In force: 34 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Jefferson County, GA, Washington County, GA

The radar

The Robins AFB radar (KJGX), 82 km from the middle of the area, began a volume at 00:26 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
Mar 18, 8:30 PM EDT	TSTM WND DMG	Riddleville, GA	TREES AND POWERLINES WERE REPORTED DOWN COUNTY WIDE.

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
Mar 18, 4:16 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.4 hours before the alert went out and 188 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1166 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 278 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.

486 
WUUS52 KFFC 190026
SVRFFC
GAC163-303-190100-
/O.NEW.KFFC.SV.W.0069.130319T0026Z-130319T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
826 PM EDT MON MAR 18 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 900 PM EDT

* AT 822 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZED
  HAIL...AND DESTRUCTIVE WINDS UP TO 70 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTH OF DAVISBORO 
  TO HARRISON...MOVING EAST AT 50 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
TUESDAY MORNING FOR SOUTHEASTERN GEORGIA.

&&

LAT...LON 3299 8253 3283 8256 3279 8273 3282 8281
      3297 8271 3311 8270 3305 8228 3301 8227
      3295 8227
TIME...MOT...LOC 0026Z 280DEG 37KT 3309 8259 3296 8259
          3279 8270

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 8:00 PM EDT	Severe Thunderstorm Warning	FFC	Macon, Marion, Schley, Sumter, Taylor, Webster	30 min
Mar 18, 8:14 PM EDT	Special Weather Statement	FFC	Emanuel, Jefferson, Johnson, Laurens, Treutlen	61 min
Mar 18, 8:20 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Emanuel, Jefferson, Johnson, Laurens, Montgomery and 4 more	40 min
Mar 18, 8:38 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson	37 min
Mar 18, 8:44 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Pulaski, Telfair, Wilcox	61 min
Mar 18, 8:53 PM EDT	Special Weather Statement	FFC	Crisp, Dooly, Sumter	37 min
Mar 18, 8:53 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Montgomery, Toombs, Treutlen, Wheeler	52 min
Mar 18, 9:43 PM EDT	Special Weather Statement	FFC	Montgomery, Telfair, Toombs, Wheeler	32 min
Mar 19, 3:49 PM EDT	Freeze Watch	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 48 more	12 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2013 Every severe thunderstorm warning in 2013

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.