Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 40, NWS Atlanta, GA

February 25, 2017Cherokee County, Dawson County, Pickens County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 25, 2017, 5:27 AM EST for Cherokee County, Dawson County, Pickens County, Georgia. It was in force for 36 min. 2 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: Feb 25, 2017, 5:27 AM EST (10:27 UTC)
Expired: Feb 25, 2017, 6:03 AM EST
In force: 36 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cherokee County, GA, Dawson County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 128 km from the middle of the area, began a volume at 10:30 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
Feb 25, 5:36 AM EST	TSTM WND DMG	1 Se Jasper, GA	A TREE WAS REPORTED DOWN AT THE INTERSECTION OF SWEET GUM CIRCLE AND WHITE OAK DRIVE.
Feb 25, 5:36 AM EST	TSTM WND DMG	2 S Jasper, GA	A TREE WAS RETPORTED DOWN ON CAMP ROAD NEAR CORNERSTONE CHURCH.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 10.5 hours before the alert went out and 127 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: 48 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 1976 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

072 
WUUS52 KFFC 251027
SVRFFC
GAC057-085-227-251115-
/O.NEW.KFFC.SV.W.0040.170225T1027Z-170225T1115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service PEACHTREE CITY GA
527 AM EST SAT FEB 25 2017

The National Weather Service in PEACHTREE CITY has issued a

* Severe Thunderstorm Warning for...
  Northern Cherokee County in north central Georgia...
  Western Dawson County in north central Georgia...
  Pickens County in north central Georgia...

* Until 615 AM EST

* At 527 AM EST, a severe thunderstorm was located over Talmadge, or
  10 miles southwest of Jasper, moving east at 35 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. 

* Locations impacted include...
  Jasper, Ball Ground, Nelson, Waleska, Talking Rock, Amicalola Falls
  State Park, Sequoyah Lake, Marblehill, Juno, Fausett Lake, Len
  Foote Hike Inn, Salacoa Valley, Blaine, Lake Tamarack, Hollis
  Lathem Reservoir, Talmadge, Tate, Reavis Mountain, Hinton and Black
  Gap Shelter.

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 3454 8419 3449 8413 3434 8422 3431 8465
      3435 8465 3435 8464 3436 8465 3449 8465
      3456 8443 3455 8442 3455 8437 3456 8437
      3456 8435 3459 8432 3457 8429 3457 8426
      3460 8426 3460 8422 3462 8420
TIME...MOT...LOC 1027Z 260DEG 29KT 3441 8459 

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

1 follow-up statement

282 
WWUS52 KFFC 251103
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
603 AM EST SAT FEB 25 2017

GAC057-085-227-251112-
/O.CAN.KFFC.SV.W.0040.000000T0000Z-170225T1115Z/
Cherokee GA-Dawson GA-Pickens GA-
603 AM EST SAT FEB 25 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CHEROKEE...WESTERN
DAWSON AND PICKENS COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

LAT...LON 3454 8419 3449 8413 3434 8422 3431 8465
      3435 8465 3435 8464 3436 8465 3449 8465
      3456 8443 3455 8442 3455 8437 3456 8437
      3456 8435 3459 8432 3457 8429 3457 8426
      3460 8426 3460 8422 3462 8420
TIME...MOT...LOC 1102Z 260DEG 29KT 3446 8425 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 25, 1:20 AM EST	Special Weather Statement	FFC	Dade	55 min
Feb 25, 2:43 AM EST	Special Weather Statement	FFC	Catoosa	32 min
Feb 25, 3:15 AM EST	Special Weather Statement	FFC	Walker	30 min
Feb 25, 3:46 AM EST	Special Weather Statement	FFC	Chattooga	29 min
Feb 25, 4:10 AM EST	Special Weather Statement	FFC	Floyd	35 min
Feb 25, 5:04 AM EST	Special Weather Statement	FFC	Bartow, Pickens	26 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 Every severe thunderstorm warning in 2017

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.