Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Greenville-Spartanburg, SC

April 8, 2021Anderson County, Oconee County, South Carolina; Franklin County, Hart County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 8, 2021, 10:14 PM EDT for Anderson County, Oconee County, South Carolina; Franklin County, Hart County, Stephens County, Georgia. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 8, 2021, 10:14 PM EDT (02:14 UTC)
Expired
Apr 8, 2021, 11:00 PM EDT
In force
46 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Franklin County, GA, Hart County, GA, Stephens County, GA, Anderson County, SC, Oconee County, SC

The radar

The Greer radar (KGSP), 96 km from the middle of the area, began a volume at 02:13 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.2 hours before the alert went out and 176 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 366 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
366 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
1722 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted.

079 
WUUS52 KGSP 090214
SVRGSP
GAC119-147-257-SCC007-073-090300-
/O.NEW.KGSP.SV.W.0020.210409T0214Z-210409T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
1014 PM EDT Thu Apr 8 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Northern Franklin County in northeastern Georgia...
  Southeastern Stephens County in northeastern Georgia...
  Northwestern Hart County in northeastern Georgia...
  West central Anderson County in Upstate South Carolina...
  Southeastern Oconee County in Upstate South Carolina...

* Until 1100 PM EDT.

* At 1013 PM EDT, a severe thunderstorm was located 7 miles southeast
  of Toccoa, or near Avalon, moving east at 25 mph.

  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...
  Hartwell, Reed Creek, Lavonia, Gumlog, Martin, Avalon, Tugaloo
  State Park, Townville, Fair Play and Eastanolee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A few trees and power lines will be blown down in the warned area.
Hail can cause major property damage, especially to vehicles. Seek
shelter inside an interior room.

This storm is producing frequent and intense lightning. Turn off
electrical appliances. Do not use corded telephones. Do not take a
bath or shower.

Lake Hartwell is in the path of this storm. Get away from the water 
and seek shelter in an interior room in the nearest shelter. 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 Greenville-Spartanburg 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 3447 8333 3458 8332 3459 8288 3435 8292
TIME...MOT...LOC 0213Z 278DEG 24KT 3451 8323 

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

8
1 follow-up statement
522 
WWUS52 KGSP 090242
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
1042 PM EDT Thu Apr 8 2021

GAC119-257-SCC007-090251-
/O.CAN.KGSP.SV.W.0020.000000T0000Z-210409T0300Z/
Franklin GA-Stephens GA-Anderson SC-
1042 PM EDT Thu Apr 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FRANKLIN...
SOUTHEASTERN STEPHENS AND WEST CENTRAL ANDERSON COUNTIES IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has tracked away 
from these counties, and therefore the warning has been cancelled.

LAT...LON 3440 8310 3449 8305 3450 8306 3450 8307
      3452 8309 3453 8308 3453 8309 3455 8309
      3454 8293 3448 8299 3448 8295 3449 8294
      3448 8292 3449 8291 3448 8290 3435 8292
TIME...MOT...LOC 0241Z 279DEG 23KT 3448 8303 

$$

GAC147-SCC073-090300-
/O.CON.KGSP.SV.W.0020.000000T0000Z-210409T0300Z/
Hart GA-Oconee SC-
1042 PM EDT Thu Apr 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR NORTHWESTERN HART AND SOUTHERN OCONEE COUNTIES...

At 1041 PM EDT, a severe thunderstorm was located 10 miles northwest
of Hartwell, or near Tugaloo State Park, moving east at 25 mph.

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...
Hartwell, Reed Creek, Fair Play and Lake Hartwell. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A few trees and power lines will be blown down in the warned area.
Hail can cause major property damage, especially to vehicles. Seek
shelter inside an interior room.

This storm is producing frequent and intense lightning. Turn off
electrical appliances. Do not use corded telephones. Do not take a
bath or shower.

Lake Hartwell is in the path of this storm. Get away from the water 
and seek shelter in an interior room in the nearest shelter. 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 Greenville-Spartanburg 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 3440 8310 3449 8305 3450 8306 3450 8307
      3452 8309 3453 8308 3453 8309 3455 8309
      3454 8293 3448 8299 3448 8295 3449 8294
      3448 8292 3449 8291 3448 8290 3435 8292
TIME...MOT...LOC 0241Z 279DEG 23KT 3448 8303 

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

8

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 9:50 PM EDTSevere Thunderstorm WarningGSPOconee25 min
Apr 8, 10:12 PM EDTSpecial Weather StatementGSPOconee33 min
Apr 8, 10:30 PM EDTSevere Thunderstorm WarningGSPAnderson, Oconee, Pickens45 min
Apr 8, 11:02 PM EDTSpecial Weather StatementGSPAnderson43 min
Apr 8, 11:26 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson34 min
Apr 8, 11:36 PM EDTSpecial Weather StatementGSPAnderson24 min
Apr 8, 11:58 PM EDTSpecial Weather StatementGSPAnderson32 min
Apr 9, 12:01 AM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson, Greenwood, Laurens44 min
Apr 9, 12:05 AM EDTSpecial Weather StatementGSPLaurens25 min
Apr 9, 12:47 AM EDTSpecial Weather StatementGSPGreenwood28 min
Apr 9, 12:58 AM EDTSpecial Weather StatementGSPGreenville32 min
Apr 9, 1:02 AM EDTSpecial Weather StatementGSPLaurens28 min
Apr 9, 1:16 AM EDTSpecial Weather StatementGSPLaurens44 min
Apr 8, 8:59 PM EDTSpecial Weather StatementGSPRabun31 min
Apr 8, 9:19 PM EDTSpecial Weather StatementGSPHabersham26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.