Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 101, NWS Greenville-Spartanburg, SC

August 11, 2021Franklin County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 11, 2021, 3:47 PM EDT for Franklin County, Georgia. It was in force for 43 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: Aug 11, 2021, 3:47 PM EDT (19:47 UTC)
Expired: Aug 11, 2021, 4:30 PM EDT
In force: 43 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Franklin County, GA

The radar

The Greer radar (KGSP), 107 km from the middle of the area, began a volume at 19:45 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
Aug 11, 3:51 PM EDT	HAIL 1	Carnesville, GA	CO-OP OBSERVER REPORTED QUARTER (1.00) SIZE HAIL IN CARNESVILLE.

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 12:00Z, 7.8 hours before the alert went out and 163 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: 1000 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

416 
WUUS52 KGSP 111947
SVRGSP
GAC119-112030-
/O.NEW.KGSP.SV.W.0101.210811T1947Z-210811T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
347 PM EDT Wed Aug 11 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Franklin County in northeastern Georgia...

* Until 430 PM EDT.

* At 347 PM EDT, a severe thunderstorm was located near Carnesville,
  and is nearly stationary.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is expected. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Carnesville, Royston, Lavonia, Canon, Franklin Springs, Victoria
  Bryant State Park and Martin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Brief damaging winds will blow down trees and power lines over small
areas. A brief period of large hail is also possible. Seek shelter
inside an interior room.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Please report damaging winds, hail, or flooding to the National
Weather Service by calling toll free, 1, 800, 2 6 7, 8 1 0 1, or by
posting on our Facebook page, or Tweet it using hashtag nwsgsp. Your
message should describe the event and the specific location where it
occurred.

&&

LAT...LON 3425 8320 3424 8325 3426 8328 3440 8336
      3448 8322 3448 8318 3449 8316 3443 8309
      3436 8311 3434 8310 3428 8310 3424 8317
TIME...MOT...LOC 1947Z 325DEG 4KT 3439 8322 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TDP

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 8:01 PM EDT	Special Weather Statement	GSP	Hart	29 min
Aug 10, 8:04 PM EDT	Special Weather Statement	GSP	Rabun	26 min
Aug 11, 2:32 PM EDT	Special Weather Statement	GSP	Habersham	28 min
Aug 11, 4:11 PM EDT	Severe Thunderstorm Warning	GSP	Hart	19 min
Aug 11, 4:28 PM EDT	Special Weather Statement	GSP	Elbert	32 min
Aug 11, 4:38 PM EDT	Severe Thunderstorm Warning	GSP	Elbert	52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021 Every severe thunderstorm warning in 2021

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.