Alert archive / Georgia / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 154, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 20, 2021, 4:44 PM EDT for Franklin County, Habersham County, Stephens County, Georgia; Oconee County, South Carolina. It was in force for 46 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 20, 2021, 4:44 PM EDT (20:44 UTC)
- Expired
- Aug 20, 2021, 5:30 PM EDT
- In force
- 46 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Franklin County, GA, Habersham County, GA, Stephens County, GA, Oconee County, SC
The radar
The Greer radar (KGSP), 104 km from the middle of the area, began a volume at 20:44 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 20, 4:57 PM EDT | TSTM WND DMG | Toccoa, GA | TREES DOWN OFF SMITH RD IN TOCCOA. |
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, 8.7 hours before the alert went out and 174 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.
- Mixed-layer CAPE
- 189 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
476
WUUS52 KGSP 202044
SVRGSP
GAC119-137-257-SCC073-202130-
/O.NEW.KGSP.SV.W.0154.210820T2044Z-210820T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
444 PM EDT Fri Aug 20 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Severe Thunderstorm Warning for...
Northern Franklin County in northeastern Georgia...
Stephens County in northeastern Georgia...
East central Habersham County in northeastern Georgia...
Southwestern Oconee County in Upstate South Carolina...
* Until 530 PM EDT.
* At 444 PM EDT, a severe thunderstorm was located near Toccoa,
moving southeast at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Toccoa, Carnesville, Lavonia, Gumlog, Martin, Avalon, Tallulah
Falls, Hollywood, Boydville and Eastanolee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
Torrential rainfall is occurring with this storm, and may lead to
minor flooding. Do not drive your vehicle through flooded roadways.
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 3432 8334 3472 8350 3473 8337 3472 8335
3473 8335 3474 8327 3447 8306 3442 8309
TIME...MOT...LOC 2044Z 335DEG 14KT 3463 8333
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RWH3 follow-up statements
614
WWUS52 KGSP 202106
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
506 PM EDT Fri Aug 20 2021
SCC073-202116-
/O.CAN.KGSP.SV.W.0154.000000T0000Z-210820T2130Z/
Oconee SC-
506 PM EDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN OCONEE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3432 8334 3466 8348 3468 8344 3468 8332
3464 8327 3464 8326 3461 8323 3461 8321
3447 8306 3442 8309
TIME...MOT...LOC 2106Z 337DEG 13KT 3457 8331
$$
GAC119-137-257-202130-
/O.CON.KGSP.SV.W.0154.000000T0000Z-210820T2130Z/
Franklin GA-Stephens GA-Habersham GA-
506 PM EDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR CENTRAL FRANKLIN...STEPHENS AND EAST CENTRAL HABERSHAM
COUNTIES...
At 506 PM EDT, a severe thunderstorm was located over Toccoa, moving
south at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Toccoa, Carnesville, Lavonia, Gumlog, Martin, Avalon, Hollywood,
Boydville, Eastanolee and Turnerville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
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 3432 8334 3466 8348 3468 8344 3468 8332
3464 8327 3464 8326 3461 8323 3461 8321
3447 8306 3442 8309
TIME...MOT...LOC 2106Z 337DEG 13KT 3457 8331
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RWH220
WWUS52 KGSP 202118
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
518 PM EDT Fri Aug 20 2021
GAC137-202128-
/O.CAN.KGSP.SV.W.0154.000000T0000Z-210820T2130Z/
Habersham GA-
518 PM EDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HABERSHAM COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3432 8334 3454 8343 3467 8337 3468 8336
3468 8332 3464 8327 3464 8326 3461 8323
3461 8321 3447 8306 3442 8309
TIME...MOT...LOC 2118Z 335DEG 14KT 3453 8328
$$
GAC119-257-202130-
/O.CON.KGSP.SV.W.0154.000000T0000Z-210820T2130Z/
Franklin GA-Stephens GA-
518 PM EDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR CENTRAL FRANKLIN AND STEPHENS COUNTIES...
At 518 PM EDT, a severe thunderstorm was located 4 miles southeast of
Toccoa, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Toccoa, Carnesville, Lavonia, Gumlog, Martin, Avalon, Boydville and
Eastanolee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
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 3432 8334 3454 8343 3467 8337 3468 8336
3468 8332 3464 8327 3464 8326 3461 8323
3461 8321 3447 8306 3442 8309
TIME...MOT...LOC 2118Z 335DEG 14KT 3453 8328
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RWH097
WWUS52 KGSP 202129
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
529 PM EDT Fri Aug 20 2021
GAC119-257-202139-
/O.EXP.KGSP.SV.W.0154.000000T0000Z-210820T2130Z/
Franklin GA-Stephens GA-
529 PM EDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FRANKLIN AND STEPHENS
COUNTIES WILL EXPIRE AT 530 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3432 8334 3454 8343 3467 8337 3468 8336
3468 8332 3464 8327 3464 8326 3461 8323
3461 8321 3447 8306 3442 8309
TIME...MOT...LOC 2129Z 335DEG 14KT 3451 8327
$$
RWHThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 5:28 PM EDT | Special Weather Statement | GSP | Franklin, Hart | 32 min |
| Aug 20, 5:58 PM EDT | Special Weather Statement | GSP | Hart | 32 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2021Severe Thunderstorm Warnings in South Carolina, 2021Every 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.