Alert archive / South Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 273, NWS Greenville-Spartanburg, SC

August 6, 20184 counties in South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 6, 2018, 6:07 PM EDT for 4 counties in South Carolina. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 6, 2018, 6:07 PM EDT (22:07 UTC)
Expired: Aug 6, 2018, 6:45 PM EDT
In force: 38 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, York County, SC

The radar

The Greer radar (KGSP), 75 km from the middle of the area, began a volume at 22:10 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, 10.1 hours before the alert went out and 192 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: 874 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1356 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Aug 6, 5:32 PM EDT, 35 minutes earlier.

Area forecast discussion, Aug 6, 5:32 PM EDT, 35 minutes before

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Hazardous weather outlook, Aug 6, 4:40 PM EDT, 1 hour 27 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
440 PM EDT Mon Aug 6 2018

NCZ033-048>053-058-059-062>065-501-503-505-507-509-071200-
Avery-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Graham-
Northern Jackson-Macon-Southern Jackson-Transylvania-Henderson-
Caldwell Mountains-Burke Mountains-McDowell Mountains-
Rutherford Mountains-Polk Mountains-
440 PM EDT Mon Aug 6 2018

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...Tonight.

Scattered to numerous showers and thunderstorms will continue into
the evening before diminishing overnight. The primary impacts from
the storms will be cloud-to-ground lightning, torrential rain and
gusty or potentially damaging winds.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

This period will include periodic bouts of thunderstorms. The
coverage will be maximized during the afternoon and evening.
Primary impacts include cloud-to-ground lightning, heavy rain and
gusty winds.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to forward any reports of large hail,
damaging winds, or flash flooding to our office.

GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-
506-508-510-SCZ001>014-019-071200-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Alexander-Iredell-
Davie-Catawba-Rowan-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-
Union-Greater Caldwell-Greater Burke-Eastern McDowell-
Greater Rutherford-Eastern Polk-Oconee Mountains-Pickens Mountains-
Greenville Mountains-Greater Oconee-Greater Pickens-
Greater Greenville-Spartanburg-Cherokee-York-Anderson-Abbeville-
Laurens-Chester-Greenwood-
440 PM EDT Mon Aug 6 2018

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...Tonight.

Scattered to numerous showers and thunderstorms will continue into
the evening before diminishing overnight. The primary impacts from
the storms will be cloud-to-ground lightning, torrential rain and
gusty or potentially damaging winds.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

This period will include periodic bouts of thunderstorms. The
coverage will be maximized during the afternoon and evening. Primary
impacts include cloud-to-ground lightning, heavy rain and gusty
winds.

Additionally, heat index values will range from 95 to 100 degrees
during the afternoon hours on Tuesday and Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to forward any reports of large hail, damaging
winds, or flash flooding to our office.

In the hours before

Local storm report, Aug 6, 5:19 PM EDT, 48 minutes before

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Local storm report, Aug 6, 5:35 PM EDT, 32 minutes before

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Special weather statement, Aug 6, 5:45 PM EDT, 22 minutes before

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Local storm report, Aug 6, 5:56 PM EDT, 11 minutes before

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Local storm report, Aug 6, 5:59 PM EDT, 8 minutes before

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Special weather statement, Aug 6, 6:02 PM EDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 1:32 PM EDT	Special Weather Statement	GSP	Burke	28 min
Aug 6, 1:34 PM EDT	Special Weather Statement	GSP	Haywood	56 min
Aug 6, 1:40 PM EDT	Special Weather Statement	GSP	Transylvania	65 min
Aug 6, 1:43 PM EDT	Special Weather Statement	GSP	Alexander, Caldwell	62 min
Aug 6, 1:51 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Caldwell	54 min
Aug 6, 2:46 PM EDT	Special Weather Statement	GSP	Henderson	29 min
Aug 6, 2:50 PM EDT	Special Weather Statement	GSP	Alexander	25 min
Aug 6, 3:31 PM EDT	Severe Thunderstorm Warning	GSP	Jackson	44 min
Aug 6, 3:35 PM EDT	Special Weather Statement	GSP	Iredell	25 min
Aug 6, 3:39 PM EDT	Special Weather Statement	GSP	Catawba	36 min
Aug 6, 3:53 PM EDT	Special Weather Statement	GSP	Polk	37 min
Aug 6, 3:55 PM EDT	Severe Thunderstorm Warning	GSP	Transylvania	50 min
Aug 6, 4:17 PM EDT	Special Weather Statement	GSP	Lincoln	28 min
Aug 6, 4:25 PM EDT	Special Weather Statement	GSP	Mecklenburg	35 min
Aug 6, 4:42 PM EDT	Special Weather Statement	GSP	Mecklenburg	33 min
Aug 6, 5:09 PM EDT	Special Weather Statement	GSP	Cabarrus, Gaston, Mecklenburg	36 min
Aug 6, 5:45 PM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg	30 min
Aug 6, 6:02 PM EDT	Special Weather Statement	GSP	Cleveland	28 min
Aug 6, 6:11 PM EDT	Special Weather Statement	GSP	Union	34 min
Aug 6, 6:19 PM EDT	Areal Flood Advisory	GSP	Cabarrus, Gaston, Mecklenburg, Union	116 min
Aug 6, 3:16 PM EDT	Special Weather Statement	GSP	Greenville	29 min
Aug 6, 3:33 PM EDT	Severe Thunderstorm Warning	GSP	Oconee	42 min
Aug 6, 4:26 PM EDT	Special Weather Statement	GSP	Oconee	34 min
Aug 6, 4:51 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Oconee, Pickens	39 min
Aug 6, 5:02 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens	43 min
Aug 6, 5:17 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg, Union	43 min
Aug 6, 5:29 PM EDT	Severe Thunderstorm Warning	GSP	Abbeville, Anderson, Greenville, Oconee	46 min
Aug 6, 6:43 PM EDT	Special Weather Statement	GSP	Chester	32 min
Aug 6, 6:53 PM EDT	Severe Thunderstorm Warning	GSP	Chester, Union	52 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2018 Every severe thunderstorm warning in 2018

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.