Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 13, 2021York County, South Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 13, 2021, 7:46 PM EDT for York County, South Carolina. It was in force for 29 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 13, 2021, 7:46 PM EDT (23:46 UTC)
Expired: Aug 13, 2021, 8:15 PM EDT
In force: 29 min
Issued by: NWS Greenville-Spartanburg, SC
Hail: 0.25 in
Wind: 40

County York County, SC

The radar

The Greer radar (KGSP), 80 km from the middle of the area, began a volume at 23:45 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, 11.8 hours before the alert went out and 182 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: 726 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1319 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 21 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this special weather statement went out at Aug 13, 6:35 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 13, 6:35 PM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, Aug 13, 4:09 PM EDT, 3 hours 37 minutes before

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In the hours before

Special weather statement, Aug 13, 3:44 PM EDT, 4 hours 2 minutes before

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Special weather statement, Aug 13, 4:23 PM EDT, 3 hours 23 minutes before

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Local storm report, Aug 13, 4:26 PM EDT, 3 hours 20 minutes before

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Local storm report, Aug 13, 4:26 PM EDT, 3 hours 20 minutes before

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Special weather statement, Aug 13, 5:01 PM EDT, 2 hours 45 minutes before

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Special weather statement, Aug 13, 7:46 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
746 PM EDT Fri Aug 13 2021

SCZ008-009-140015-
York SC-Cherokee SC-
746 PM EDT Fri Aug 13 2021

...A strong thunderstorm will impact portions of western York and
southeastern Cherokee Counties through 815 PM EDT...

At 746 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles southwest of York, or over Sharon, moving northeast at 35 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
York, Sharon, Hickory Grove, Smyrna, Kings Mountain State Park, Kings
Creek and Bullock Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3483 8134 3493 8153 3512 8139 3499 8114
TIME...MOT...LOC 2346Z 232DEG 32KT 3495 8135

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

WJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 1:05 PM EDT	Special Weather Statement	GSP	Caldwell	25 min
Aug 13, 1:29 PM EDT	Special Weather Statement	GSP	Avery	31 min
Aug 13, 2:37 PM EDT	Special Weather Statement	GSP	Henderson	23 min
Aug 13, 3:44 PM EDT	Special Weather Statement	GSP	Polk	31 min
Aug 13, 4:23 PM EDT	Special Weather Statement	GSP	Buncombe	37 min
Aug 13, 5:01 PM EDT	Special Weather Statement	GSP	Yancey	29 min
Aug 12, 8:13 PM EDT	Special Weather Statement	GSP	Spartanburg	32 min

Nearby

Special Weather Statements in South Carolina, 2021 Every special weather statement 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.