Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

May 4, 2021Greenville County, South Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at May 4, 2021, 12:36 PM EDT for Greenville County, South Carolina. It was in force for 24 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: May 4, 2021, 12:36 PM EDT (16:36 UTC)
Expired: May 4, 2021, 1:00 PM EDT
In force: 24 min
Issued by: NWS Greenville-Spartanburg, SC

County Greenville County, SC

The radar

The Greer radar (KGSP), 12 km from the middle of the area, began a volume at 16:38 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.6 hours before the alert went out and 258 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: 590 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

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 May 4, 10:03 AM EDT, 2 hours 33 minutes earlier.

Area forecast discussion, May 4, 10:03 AM EDT, 2 hours 33 minutes before

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Hazardous weather outlook, May 4, 9:48 AM EDT, 2 hours 48 minutes before

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In the hours before

Special weather statement, May 4, 12:36 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
1236 PM EDT Tue May 4 2021

SCZ005-006-010-041700-
Greater Pickens SC-Anderson SC-Greater Greenville SC-
1236 PM EDT Tue May 4 2021

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL GREENVILLE...NORTH
CENTRAL ANDERSON AND EAST CENTRAL PICKENS COUNTIES UNTIL 100 PM
EDT...

At 1236 PM EDT, Doppler radar was tracking a strong thunderstorm 4
miles east of Easley, or near Powdersville, moving northeast at 35
mph.

Locations to be impacted include... Greenville, Easley, Greer,
Mauldin, Taylors, Berea, Five Forks and Welcome.

Wind gusts up to 40 mph and pea size hail will be possible in these
areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The combination of gusty winds and saturated soil conditions will
cause scattered trees and power lines to fall. Seek shelter inside an
interior room.

This storm may intensify, so be certain to monitor local radio and tv
stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

LAT...LON 3483 8263 3503 8226 3495 8222 3485 8223
      3485 8222 3483 8219 3481 8217 3473 8257
TIME...MOT...LOC 1636Z 245DEG 32KT 3481 8252

8

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 10:57 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Haywood, Jackson, Macon, Swain	36 min
May 4, 12:09 PM EDT	Areal Flood Advisory	GSP	Graham, Macon, Swain	3 hr
May 4, 3:24 PM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg	36 min
May 4, 3:39 PM EDT	Special Weather Statement	GSP	Union	51 min
May 4, 3:53 PM EDT	Severe Thunderstorm Warning	GSP	Union	52 min
May 4, 1:23 PM EDT	Special Weather Statement	GSP	Pickens	37 min
May 4, 2:19 PM EDT	Special Weather Statement	GSP	Spartanburg	26 min
May 4, 2:51 PM EDT	Special Weather Statement	GSP	Union, York	39 min
May 4, 3:05 PM EDT	Special Weather Statement	GSP	Abbeville	40 min
May 4, 3:21 PM EDT	Special Weather Statement	GSP	Laurens, Union	24 min
May 4, 3:44 PM EDT	Severe Thunderstorm Warning	GSP	Abbeville, Greenwood, Laurens	13 min
May 4, 2:24 PM EDT	Special Weather Statement	GSP	Franklin, Hart	36 min
May 4, 2:32 PM EDT	Special Weather Statement	GSP	Hart	28 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.