Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 155, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 21, 2021, 8:09 PM EDT for Cherokee County, Chester County, Union County, South Carolina. It was in force for 51 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
- Aug 21, 2021, 8:09 PM EDT (00:09 UTC)
- Expired
- Aug 21, 2021, 9:00 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 Cherokee County, SC, Chester County, SC, Union County, SC
The radar
The Greer radar (KGSP), 65 km from the middle of the area, began a volume at 00:09 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 00:00Z, 0.2 hours before the alert went out and 203 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
- 1078 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1459 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
484
WUUS52 KGSP 220009
SVRGSP
SCC021-023-087-220100-
/O.NEW.KGSP.SV.W.0155.210822T0009Z-210822T0100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
809 PM EDT Sat Aug 21 2021
The National Weather Service in Greenville-Spartanburg has issued a
* Severe Thunderstorm Warning for...
Northwestern Chester County in Upstate South Carolina...
South central Cherokee County in Upstate South Carolina...
Northeastern Union County in Upstate South Carolina...
* Until 900 PM EDT.
* At 808 PM EDT, a severe thunderstorm was located 7 miles north of
Union, or 4 miles east of Jonesville, moving southeast at 15 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...
Union, Monarch Mill, Jonesville, Lockhart, Saratt, Adamsburg,
Santuc and Carlisle.
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 3485 8172 3495 8159 3487 8147 3485 8145
3482 8147 3482 8139 3474 8127 3456 8152
TIME...MOT...LOC 0008Z 314DEG 13KT 3483 8159
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JPT1 follow-up statement
829
WWUS52 KGSP 220037
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
837 PM EDT Sat Aug 21 2021
SCC021-220046-
/O.CAN.KGSP.SV.W.0155.000000T0000Z-210822T0100Z/
Cherokee SC-
837 PM EDT Sat Aug 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CHEROKEE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3478 8162 3485 8153 3487 8148 3486 8148
3484 8146 3482 8147 3482 8139 3471 8133
3456 8152
TIME...MOT...LOC 0036Z 314DEG 13KT 3476 8150
$$
SCC023-087-220100-
/O.CON.KGSP.SV.W.0155.000000T0000Z-210822T0100Z/
Chester SC-Union SC-
837 PM EDT Sat Aug 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN CHESTER AND NORTHEASTERN UNION COUNTIES...
At 836 PM EDT, a severe thunderstorm was located 7 miles east of
Union, or near Lockhart, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and up to 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...
Monarch Mill, Lockhart, Adamsburg and Santuc.
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 3478 8162 3485 8153 3487 8148 3486 8148
3484 8146 3482 8147 3482 8139 3471 8133
3456 8152
TIME...MOT...LOC 0036Z 314DEG 13KT 3476 8150
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JPTThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 9:01 PM EDT | Special Weather Statement | GSP | Chester | 44 min |
| Aug 21, 9:48 PM EDT | Special Weather Statement | GSP | Lancaster | 27 min |
| Aug 22, 2:15 AM EDT | Special Weather Statement | GSP | Cherokee | 60 min |
| Aug 22, 2:35 AM EDT | Areal Flood Advisory | GSP | Cherokee | 97 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.