Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 68, NWS Atlanta, GA

April 25, 20154 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 25, 2015, 8:00 PM EDT for 4 counties in Georgia. It was in force for 45 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: Apr 25, 2015, 8:00 PM EDT (00:00 UTC)
Expired: Apr 25, 2015, 8:45 PM EDT
In force: 45 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Glascock County, GA, Hancock County, GA, Jefferson County, GA, Washington County, GA

The radar

The Robins AFB radar (KJGX), 65 km from the middle of the area, began a volume at 00:01 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
Apr 25, 5:38 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.0 hours before the alert went out and 153 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: 1037 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 889 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

286 
WUUS52 KFFC 260000
SVRFFC
GAC125-141-163-303-260045-
/O.NEW.KFFC.SV.W.0068.150426T0000Z-150426T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
800 PM EDT SAT APR 25 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN HANCOCK COUNTY IN EAST CENTRAL GEORGIA...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL GEORGIA...
  NORTHWESTERN JEFFERSON COUNTY IN EAST CENTRAL GEORGIA...
  GLASCOCK COUNTY IN EAST CENTRAL GEORGIA...

* UNTIL 845 PM EDT

* AT 800 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES NORTHWEST
  OF DEEPSTEP...OR 9 MILES EAST OF MILLEDGEVILLE...MOVING EAST AT 45
  MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GIBSON...STAPLETON...AVERA...MITCHELL...DEEPSTEP...EDGE HILL...
  EDGEHILL...WARTHEN...STAPLETONS CROSSROADS...DOWNS...BEULAH...
  HAMBURG STATE PARK...LINTON...GRANGE AND AGRICOLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3304 8250 3302 8307 3306 8304 3308 8305
      3306 8307 3306 8310 3313 8311 3314 8309
      3315 8310 3330 8254 3317 8244
TIME...MOT...LOC 0000Z 262DEG 40KT 3310 8306 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:03 PM EDT	Special Weather Statement	FFC	Taliaferro, Warren	42 min
Apr 25, 8:29 PM EDT	Special Weather Statement	FFC	Monroe	31 min
Apr 25, 8:32 PM EDT	Special Weather Statement	FFC	Lamar, Pike	28 min
Apr 25, 8:40 PM EDT	Special Weather Statement	FFC	Montgomery, Toombs	35 min
Apr 25, 8:42 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Jones, Lamar, Monroe, Pike	48 min
Apr 25, 8:45 PM EDT	Special Weather Statement	FFC	Glascock	30 min
Apr 25, 11:30 PM EDT	River Flood Warning	FFC	Washington, Wilkinson	7 days
Apr 26, 1:23 AM EDT	Special Weather Statement	FFC	Chattooga, Gordon	37 min
Apr 26, 3:28 AM EDT	Special Weather Statement	FFC	Catoosa, Dade, Fannin, Murray, Whitfield	47 min
Apr 26, 4:07 AM EDT	Special Weather Statement	FFC	Gilmer, Murray, Walker, Whitfield	38 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.