Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Greenville-Spartanburg, SC

March 25, 2021Chester County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Mar 25, 2021, 5:47 PM EDT for Chester County, South Carolina. It was in force for 28 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: Mar 25, 2021, 5:47 PM EDT (21:47 UTC)
Expired: Mar 25, 2021, 6:15 PM EDT
In force: 28 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Chester County, SC

The radar

The Columbia radar (KCAE), 77 km from the middle of the area, began a volume at 21:49 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.8 hours before the alert went out and 187 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: 1 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

116 
WUUS52 KGSP 252147
SVRGSP
SCC023-252215-
/O.NEW.KGSP.SV.W.0004.210325T2147Z-210325T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
547 PM EDT Thu Mar 25 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Southeastern Chester County in Upstate South Carolina...

* Until 615 PM EDT.

* At 546 PM EDT, a severe thunderstorm was located 13 miles southeast
  of Chester, or 6 miles west of Fishing Creek Reservoir, moving east
  at 45 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to trees and power lines.

* Locations impacted include...
  Great Falls, Fort Lawn, Fishing Creek Reservoir, Blackstock and
  Richburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes can develop quickly from severe thunderstorms. Although a 
tornado is not immediately likely, if one is spotted, act quickly 
and move to a place of safety inside a sturdy structure such as a 
basement or small interior room.

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.

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 3467 8089 3463 8090 3462 8089 3460 8089
      3455 8087 3454 8088 3455 8097 3456 8115
      3468 8118 3474 8088 3470 8086
TIME...MOT...LOC 2146Z 260DEG 37KT 3462 8101 

HAIL...1.50IN
WIND...60MPH
 
$$

LANE

1 follow-up statement

460 
WWUS52 KGSP 252205
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
605 PM EDT Thu Mar 25 2021

SCC023-252215-
/O.EXP.KGSP.SV.W.0004.000000T0000Z-210325T2215Z/
Chester SC-
605 PM EDT Thu Mar 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHESTER COUNTY
WILL EXPIRE AT 615 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 3467 8089 3463 8090 3462 8089 3460 8089
      3455 8087 3454 8088 3455 8097 3456 8115
      3468 8118 3474 8088 3470 8086
TIME...MOT...LOC 2205Z 260DEG 37KT 3465 8079 

$$

LANE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 2:14 PM EDT	Special Weather Statement	GSP	Oconee	31 min
Mar 25, 2:40 PM EDT	Tornado Warning	GSP	Greenville, Pickens, Spartanburg	50 min
Mar 25, 3:27 PM EDT	Tornado Warning	GSP	Abbeville, Anderson, Greenville	48 min
Mar 25, 4:01 PM EDT	Tornado Warning	GSP	Cherokee, Spartanburg	44 min
Mar 25, 4:14 PM EDT	Tornado Warning	GSP	Abbeville, Greenville, Greenwood, Laurens, Union	46 min
Mar 25, 4:54 PM EDT	Tornado Warning	GSP	Chester, Laurens, Union	51 min
Mar 25, 6:23 PM EDT	Special Weather Statement	GSP	Greenville	22 min
Mar 25, 6:54 PM EDT	Special Weather Statement	GSP	Spartanburg	51 min
Mar 25, 7:41 PM EDT	Areal Flood Advisory	GSP	Oconee	11 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.