Alert archive / South Carolina / Tornado Warnings in 2021

Tornado Warning 57, NWS Greenville-Spartanburg, SC

August 17, 2021Laurens County, Spartanburg County, Union County, South Carolina

NWS Greenville-Spartanburg, SC issued this tornado warning at Aug 17, 2021, 6:15 PM EDT for Laurens County, Spartanburg County, Union 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
Aug 17, 2021, 6:15 PM EDT (22:15 UTC)
Expired
Aug 17, 2021, 7:00 PM EDT
In force
45 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Laurens County, SC, Spartanburg County, SC, Union County, SC

The radar

The Greer radar (KGSP), 61 km from the middle of the area, began a volume at 22:16 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 17, 10:42 AM EDTTornado WatchSPC8 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 10.3 hours before the alert went out and 245 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, Charleston AFB, SC at 12:00Z on 2021-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1066 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, Charleston AFB, SC at 12:00Z on 2021-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939Sfc1 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
1066 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

500 
WFUS52 KGSP 172215
TORGSP
SCC059-083-087-172300-
/O.NEW.KGSP.TO.W.0057.210817T2215Z-210817T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Greenville-Spartanburg SC
615 PM EDT Tue Aug 17 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Tornado Warning for...
  Central Laurens County in Upstate South Carolina...
  Southeastern Spartanburg County in Upstate South Carolina...
  West central Union County in Upstate South Carolina...

* Until 700 PM EDT.
    
* At 615 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 10 miles south of Laurens, or near Cross Hill, moving
  north at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Laurens around 630 PM EDT.
  Clinton around 640 PM EDT.

Other locations impacted by this dangerous thunderstorm include Cross
Keys, Enoree, Mountville, Cross Anchor and Ora.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

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 3428 8207 3430 8208 3430 8210 3480 8201
      3471 8168 3431 8187 3430 8190 3426 8190
      3425 8191
TIME...MOT...LOC 2215Z 195DEG 33KT 3435 8198 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

CAC
1 follow-up statement
547 
WWUS52 KGSP 172230
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
630 PM EDT Tue Aug 17 2021

SCC059-083-087-172300-
/O.CON.KGSP.TO.W.0057.000000T0000Z-210817T2300Z/
Laurens SC-Spartanburg SC-Union SC-
630 PM EDT Tue Aug 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR CENTRAL
LAURENS...SOUTHEASTERN SPARTANBURG AND WEST CENTRAL UNION COUNTIES...
    
At 630 PM EDT, a severe thunderstorm capable of producing a tornado
was located 5 miles east of Laurens, or 4 miles west of Clinton,
moving north at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
central Laurens, southeastern Spartanburg and west central Union
Counties, including the following locations... Cross Keys, Enoree,
Cross Anchor and Ora.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3442 8207 3480 8201 3471 8168 3438 8184
TIME...MOT...LOC 2230Z 195DEG 33KT 3449 8194 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

CAC

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 11:47 AM EDTTornado WarningGSPOconee13 min
Aug 17, 12:30 PM EDTFlash Flood WarningGSPOconee5 hr
Aug 17, 12:30 PM EDTTornado WarningGSPOconee, Pickens23 min
Aug 17, 12:59 PM EDTTornado WarningGSPAnderson, Pickens23 min
Aug 17, 1:20 PM EDTTornado WarningGSPPickens25 min
Aug 17, 2:03 PM EDTFlash Flood WarningGSPGreenville, Pickens5 hr
Aug 17, 2:14 PM EDTTornado WarningGSPGreenwood, Laurens33 min
Aug 17, 2:52 PM EDTTornado WarningGSPGreenville26 min
Aug 17, 3:01 PM EDTTornado Warning Tornado observedGSPGreenville18 min
Aug 17, 3:25 PM EDTSpecial Weather StatementGSPSpartanburg35 min
Aug 17, 3:26 PM EDTSpecial Weather StatementGSPOconee34 min
Aug 17, 4:34 PM EDTSpecial Weather StatementGSPAbbeville, Anderson, Pickens26 min
Aug 17, 5:08 PM EDTTornado WarningGSPAnderson, Greenville, Pickens52 min
Aug 17, 5:10 PM EDTTornado WarningGSPAbbeville, Greenville, Greenwood, Laurens50 min
Aug 17, 5:11 PM EDTTornado WarningGSPAbbeville, Greenwood, Laurens49 min
Aug 17, 5:33 PM EDTTornado WarningGSPAnderson, Greenville, Spartanburg42 min
Aug 17, 5:37 PM EDTTornado WarningGSPChester, York38 min
Aug 17, 5:57 PM EDTTornado WarningGSPGreenville, Laurens, Spartanburg48 min
Aug 17, 5:58 PM EDTTornado WarningGSPGreenwood, Laurens47 min
Aug 17, 6:16 PM EDTFlash Flood WarningGSPGreenville, Pickens, Spartanburg3 hr
Aug 17, 6:42 PM EDTTornado WarningGSPSpartanburg48 min
Aug 17, 6:46 PM EDTTornado WarningGSPCherokee, Spartanburg44 min
Aug 17, 6:51 PM EDTTornado WarningGSPLaurens, Spartanburg, Union39 min
Aug 17, 7:59 PM EDTTornado WarningGSPCherokee, Spartanburg46 min

Nearby

Tornado Warnings in South Carolina, 2021Every tornado warning in 2021Tornadoes 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.