Alert archive / Georgia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 265, NWS Atlanta, GA

September 12, 2016Dawson County, Fannin County, Gilmer County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Sep 12, 2016, 8:48 PM EDT for Dawson County, Fannin County, Gilmer County, Georgia. It was in force for 20 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: Sep 12, 2016, 8:48 PM EDT (00:48 UTC)
Expired: Sep 12, 2016, 9:08 PM EDT
In force: 20 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dawson County, GA, Fannin County, GA, Gilmer County, GA

The radar

The Atlanta radar (KFFC), 147 km from the middle of the area, began a volume at 00:48 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
Sep 12, 8:55 PM EDT	TSTM WND DMG	4 Nw Amicalola, GA	A FEW SMALL TREES WERE DOWNED ALONG HIGHWAY 52 BY THE GILMER-DAWSON COUNTY BORDER.

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, 0.8 hours before the alert went out and 145 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: 88 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 1543 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

390 
WUUS52 KFFC 130048
SVRFFC
GAC085-111-123-130130-
/O.NEW.KFFC.SV.W.0265.160913T0048Z-160913T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
848 PM EDT MON SEP 12 2016

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GILMER COUNTY IN NORTH CENTRAL GEORGIA...
  SOUTHEASTERN FANNIN COUNTY IN NORTH CENTRAL GEORGIA...
  NORTHWESTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA...

* UNTIL 930 PM EDT

* AT 848 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER BLACK GAP
  SHELTER...OR 14 MILES NORTHEAST OF JASPER...MOVING NORTHWEST AT 10
  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
  STOVER CREEK SHELTER...ROY...AMICALOLA FALLS STATE PARK...PISGAH...
  CARTECAY...BLACK GAP SHELTER...LEN FOOTE HIKE INN AND SPRINGER
  MOUNTAIN 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 3476 8416 3464 8416 3460 8419 3458 8419
      3454 8431 3468 8445
TIME...MOT...LOC 0048Z 156DEG 8KT 3461 8424 

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

1 follow-up statement

045 
WWUS52 KFFC 130108
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
908 PM EDT MON SEP 12 2016

GAC085-111-123-130117-
/O.CAN.KFFC.SV.W.0265.000000T0000Z-160913T0130Z/
GILMER GA-FANNIN GA-DAWSON GA-
908 PM EDT MON SEP 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GILMER...
SOUTHEASTERN FANNIN AND NORTHWESTERN DAWSON 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 3476 8416 3464 8416 3460 8419 3458 8419
      3454 8431 3468 8445
TIME...MOT...LOC 0104Z 156DEG 8KT 3465 8426 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 8:22 PM EDT	Special Weather Statement	FFC	Gilmer	38 min
Sep 12, 10:17 PM EDT	Special Weather Statement	FFC	Montgomery	43 min
Sep 13, 2:52 PM EDT	Special Weather Statement	FFC	Gordon	23 min
Sep 13, 2:54 PM EDT	Special Weather Statement	FFC	Dodge, Telfair, Wilcox	36 min
Sep 13, 3:12 PM EDT	Special Weather Statement	FFC	Gordon	48 min
Sep 13, 3:34 PM EDT	Special Weather Statement	FFC	Jefferson	26 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2016 Every severe thunderstorm warning in 2016

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.