Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 86, NWS Atlanta, GA

March 27, 2017Fannin County, Gilmer County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 27, 2017, 8:22 PM EDT for Fannin County, Gilmer County, Georgia. It was in force for 38 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 27, 2017, 8:22 PM EDT (00:22 UTC)
Expired: Mar 27, 2017, 9:00 PM EDT
In force: 38 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Fannin County, GA, Gilmer County, GA

The radar

The Knoxville radar (KMRX), 160 km from the middle of the area, began a volume at 00:23 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 27, 8:25 PM EDT	HAIL 1	1 Ssw Burnett, GA	QUARTER SIZED HAIL REPORTED AT THE INTERSECTION OF BOARDTOWN ROAD AND WHITE PATH ROAD.

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, 0.4 hours before the alert went out and 170 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: 115 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1908 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

659 
WUUS52 KFFC 280022
SVRFFC
GAC111-123-280100-
/O.NEW.KFFC.SV.W.0086.170328T0022Z-170328T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
822 PM EDT MON MAR 27 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Gilmer County in north central Georgia...
  Northern Fannin County in north central Georgia...

* Until 900 PM EDT

* At 821 PM EDT, a severe thunderstorm was located over Cherry Log,
  or near Blue Ridge, moving northeast 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...
  Blue Ridge, Morganton, Dial, Hemp, Mineral Bluff, Cherry Log,
  Higdon, Hurst, Loving and Culberson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

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 3496 8417 3495 8418 3493 8416 3491 8413
      3489 8411 3487 8411 3484 8415 3481 8414
      3480 8413 3480 8410 3479 8409 3470 8444
      3487 8452 3499 8424 3499 8413
TIME...MOT...LOC 0021Z 247DEG 30KT 3482 8440 

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
Mar 27, 9:05 PM EDT	Special Weather Statement	FFC	Union	25 min
Mar 27, 9:46 PM EDT	Special Weather Statement	FFC	Polk	29 min
Mar 27, 10:12 PM EDT	Special Weather Statement	FFC	Polk	48 min
Mar 27, 11:02 PM EDT	Special Weather Statement	FFC	Catoosa, Dade	58 min
Mar 27, 11:54 PM EDT	Special Weather Statement	FFC	Catoosa, Dade, Walker, Whitfield	51 min
Mar 28, 12:38 AM EDT	Special Weather Statement	FFC	Fannin, Gilmer, Murray	52 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.