Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 187, NWS Greenville-Spartanburg, SC

July 14, 2017Oconee County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 14, 2017, 7:56 PM EDT for Oconee County, South Carolina. It was in force for 49 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: Jul 14, 2017, 7:56 PM EDT (23:56 UTC)
Expired: Jul 14, 2017, 8:45 PM EDT
In force: 49 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Oconee County, SC

The radar

The Greer radar (KGSP), 79 km from the middle of the area, began a volume at 23:56 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, 11.9 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.

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: 889 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 2 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 Jul 14, 5:35 PM EDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jul 14, 5:35 PM EDT, 2 hours 21 minutes before

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Hazardous weather outlook, Jul 14, 5:10 AM EDT, 14 hours 46 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
510 AM EDT Fri Jul 14 2017

GAZ010-NCZ033-048>053-058-059-062>065-501-503-505-507-509-150915-
Rabun-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-
510 AM EDT Fri Jul 14 2017

This Hazardous Weather Outlook is for northeast Georgia and western
North Carolina.

.DAY ONE...Today and Tonight.

Scattered to numerous thunderstorms are expected to develop across
the mountains this afternoon and evening. While the main threats will
be from torrential rainfall and cloud to ground lightning, a few of
the storms could become briefly severe, capable of producing
damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ017-018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-
508-510-SCZ001>014-019-150915-
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-
510 AM EDT Fri Jul 14 2017

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

.DAY ONE...Today and Tonight.

Temperatures in the lower to mid 90s will combine with moderate to
high levels of humidity to produce heat index values of around 100
across much of the Piedmont and foothills this afternoon. In
addition, scattered to numerous thunderstorms are expected to
develop across the area this afternoon and evening. While the main
threats will be from torrential rainfall and cloud to ground
lightning, a few of the storms could become briefly severe, capable
of producing damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Special weather statement, Jul 14, 5:58 PM EDT, 1 hour 58 minutes before

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Special weather statement, Jul 14, 6:30 PM EDT, 1 hour 26 minutes before

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Local storm report, Jul 14, 6:35 PM EDT, 1 hour 21 minutes before

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Special weather statement, Jul 14, 6:38 PM EDT, 1 hour 18 minutes before

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Special weather statement, Jul 14, 6:57 PM EDT, 59 minutes before

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Special weather statement, Jul 14, 7:31 PM EDT, 25 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
Jul 13, 8:08 PM EDT	Special Weather Statement	GSP	Union	37 min
Jul 14, 1:45 PM EDT	Special Weather Statement	GSP	Caldwell	30 min
Jul 14, 3:05 PM EDT	Special Weather Statement	GSP	Alexander	25 min
Jul 14, 3:16 PM EDT	Special Weather Statement	GSP	Buncombe	29 min
Jul 14, 3:36 PM EDT	Special Weather Statement	GSP	Buncombe	24 min
Jul 14, 3:37 PM EDT	Special Weather Statement	GSP	Alexander	23 min
Jul 14, 3:49 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	41 min
Jul 14, 4:22 PM EDT	Special Weather Statement	GSP	McDowell	53 min
Jul 14, 4:25 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	50 min
Jul 14, 4:34 PM EDT	Severe Thunderstorm Warning	GSP	Avery, Burke, McDowell, Mitchell, Yancey	41 min
Jul 14, 5:15 PM EDT	Severe Thunderstorm Warning	GSP	Burke, Caldwell, McDowell	45 min
Jul 14, 5:18 PM EDT	Special Weather Statement	GSP	Henderson	27 min
Jul 14, 5:36 PM EDT	Special Weather Statement	GSP	Rutherford	24 min
Jul 14, 5:44 PM EDT	Areal Flood Advisory	GSP	Burke, Caldwell	2 hr
Jul 14, 5:51 PM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon	24 min
Jul 14, 5:58 PM EDT	Special Weather Statement	GSP	Transylvania	32 min
Jul 14, 6:30 PM EDT	Special Weather Statement	GSP	Jackson	30 min
Jul 14, 6:38 PM EDT	Special Weather Statement	GSP	Polk	37 min
Jul 14, 6:57 PM EDT	Special Weather Statement	GSP	Transylvania	33 min
Jul 14, 7:00 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Transylvania	30 min
Jul 14, 7:06 PM EDT	Areal Flood Advisory	GSP	Transylvania	114 min
Jul 13, 8:01 PM EDT	Severe Thunderstorm Warning	GSP	Greenwood	44 min
Jul 13, 8:31 PM EDT	Special Weather Statement	GSP	Greenville	29 min
Jul 13, 9:01 PM EDT	Special Weather Statement	GSP	York	29 min
Jul 13, 9:20 PM EDT	Special Weather Statement	GSP	Greenville	25 min
Jul 13, 9:55 PM EDT	Special Weather Statement	GSP	Pickens	35 min
Jul 13, 10:31 PM EDT	Special Weather Statement	GSP	Pickens	29 min
Jul 14, 5:49 PM EDT	Special Weather Statement	GSP	Oconee	26 min
Jul 14, 7:06 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Spartanburg	24 min
Jul 14, 7:31 PM EDT	Special Weather Statement	GSP	Oconee	29 min
Jul 14, 5:47 PM EDT	Special Weather Statement	GSP	Rabun	28 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017 Every severe thunderstorm warning in 2017

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.