Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Greenville-Spartanburg, SC

August 10, 2021Greenville County, Laurens County, Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 10, 2021, 6:09 PM EDT for Greenville County, Laurens County, Spartanburg County, South Carolina. It was in force for 51 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 10, 2021, 6:09 PM EDT (22:09 UTC)
Expired: Aug 10, 2021, 7:00 PM EDT
In force: 51 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Greenville County, SC, Laurens County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 8 km from the middle of the area, began a volume at 22:12 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 10, 6:12 PM EDT	TSTM WND DMG	4 Sse Greer, SC	911 CALL CENTER REPORTED POWERLINES DOWN ON BROCKMAN MCCLIMON RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.2 hours before the alert went out and 250 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: 1302 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

834 
WUUS52 KGSP 102209
SVRGSP
SCC045-059-083-102300-
/O.NEW.KGSP.SV.W.0089.210810T2209Z-210810T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
609 PM EDT Tue Aug 10 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Northwestern Laurens County in Upstate South Carolina...
  East central Greenville County in Upstate South Carolina...
  Southwestern Spartanburg County in Upstate South Carolina...

* Until 700 PM EDT.

* At 608 PM EDT, a severe thunderstorm was located 13 miles east of
  Greenville Downtown, or near Reidville, moving east at 10 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...
  Five Forks, Reidville, Moore, GSP Airport, Mauldin and Greer. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3479 8228 3486 8229 3490 8218 3486 8198
      3468 8210
TIME...MOT...LOC 2208Z 292DEG 9KT 3483 8216 

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

$$

MOORE

1 follow-up statement

235 
WWUS52 KGSP 102226
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
626 PM EDT Tue Aug 10 2021

SCC045-059-083-102300-
/O.CON.KGSP.SV.W.0089.000000T0000Z-210810T2300Z/
Laurens SC-Greenville SC-Spartanburg SC-
626 PM EDT Tue Aug 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHWESTERN LAURENS...SOUTHEASTERN GREENVILLE AND SOUTHWESTERN
SPARTANBURG COUNTIES...

At 626 PM EDT, a severe thunderstorm was located 13 miles southwest
of Spartanburg, or near Reidville, moving east at 10 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...
Five Forks, Reidville, Moore and Mauldin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3479 8228 3486 8229 3485 8220 3489 8213
      3486 8198 3468 8210
TIME...MOT...LOC 2226Z 292DEG 9KT 3481 8211 

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

$$

MOORE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 1:52 PM EDT	Special Weather Statement	GSP	Greenwood	23 min
Aug 10, 2:29 PM EDT	Special Weather Statement	GSP	Greenwood	31 min
Aug 10, 2:53 PM EDT	Special Weather Statement	GSP	Greenwood	37 min
Aug 10, 3:27 PM EDT	Special Weather Statement	GSP	Pickens	33 min
Aug 10, 3:58 PM EDT	Special Weather Statement	GSP	Chester	32 min
Aug 10, 4:06 PM EDT	Special Weather Statement	GSP	Oconee	24 min
Aug 10, 4:20 PM EDT	Severe Thunderstorm Warning	GSP	Chester, York	20 min
Aug 10, 6:03 PM EDT	Special Weather Statement	GSP	Greenville	27 min
Aug 10, 6:10 PM EDT	Special Weather Statement	GSP	Spartanburg	35 min
Aug 10, 6:30 PM EDT	Special Weather Statement	GSP	Spartanburg	30 min
Aug 10, 6:36 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, Spartanburg, Union	39 min
Aug 10, 6:41 PM EDT	Special Weather Statement	GSP	Oconee	34 min
Aug 10, 7:03 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	23 min
Aug 10, 7:11 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Oconee	49 min
Aug 10, 7:12 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens, Spartanburg	48 min
Aug 10, 7:19 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg, Union	25 min
Aug 10, 7:30 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens, Spartanburg	45 min
Aug 10, 7:37 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg, Union	41 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 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.