Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Greenville-Spartanburg, SC

April 8, 2021Anderson County, Oconee County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 8, 2021, 10:30 PM EDT for Anderson County, Oconee County, Pickens County, South Carolina. It was in force for 45 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, 10:30 PM EDT (02:30 UTC)
Expired
Apr 8, 2021, 11:15 PM EDT
In force
45 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Anderson County, SC, Oconee County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 63 km from the middle of the area, began a volume at 02:32 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, 2.5 hours before the alert went out and 207 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.

057 
WUUS52 KGSP 090230
SVRGSP
SCC007-073-077-090315-
/O.NEW.KGSP.SV.W.0021.210409T0230Z-210409T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
1030 PM EDT Thu Apr 8 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Central Anderson County in Upstate South Carolina...
  Southwestern Pickens County in Upstate South Carolina...
  Southeastern Oconee County in Upstate South Carolina...

* Until 1115 PM EDT.

* At 1029 PM EDT, a severe thunderstorm was located 4 miles southeast
  of Seneca, 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...
  Anderson, Clemson, Seneca, Northlake, Pendleton, Townville, Sandy
  Springs, Central, Anderson Airport and Broadway Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Large hail can cause major property damage, especially to vehicles.
Strong winds may blow down a few trees and power lines. 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.

The northern part of 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 3459 8302 3473 8299 3471 8253 3446 8259
TIME...MOT...LOC 0229Z 280DEG 21KT 3464 8291 

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

8
1 follow-up statement
875 
WWUS52 KGSP 090305
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
1105 PM EDT Thu Apr 8 2021

SCC007-073-077-090315-
/O.EXP.KGSP.SV.W.0021.000000T0000Z-210409T0315Z/
Anderson SC-Pickens SC-Oconee SC-
1105 PM EDT Thu Apr 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ANDERSON...
SOUTHWESTERN PICKENS AND SOUTHEASTERN OCONEE COUNTIES WILL EXPIRE AT
1115 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.

If you observed large hail or wind damage, please report it 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 3459 8302 3473 8299 3471 8253 3446 8259
TIME...MOT...LOC 0305Z 280DEG 21KT 3461 8271 

$$

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, 10:14 PM EDTSevere Thunderstorm WarningGSPAnderson, Oconee46 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

Nearby

Severe 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.