Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 211, NWS Greenville-Spartanburg, SC

July 17, 2017Greenville County, Spartanburg County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 17, 2017, 8:47 PM EDT for Greenville County, Spartanburg County, South Carolina. It was in force for 43 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 17, 2017, 8:47 PM EDT (00:47 UTC)
Expired: Jul 17, 2017, 9:30 PM EDT
In force: 43 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Greenville County, SC, Spartanburg County, SC

The radar

The Greer radar (KGSP), 5 km from the middle of the area, began a volume at 00:50 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 00:00Z, 0.8 hours before the alert went out and 274 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: 771 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1312 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: -41 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 17, 7:59 PM EDT, 48 minutes earlier.

Area forecast discussion, Jul 17, 7:59 PM EDT, 48 minutes before

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Hazardous weather outlook, Jul 17, 6:13 AM EDT, 14 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
613 AM EDT Mon Jul 17 2017

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-181015-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander-
Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-
Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union-
Caldwell Mountains-Greater Caldwell-Burke Mountains-Greater Burke-
McDowell Mountains-Eastern McDowell-Rutherford Mountains-
Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains-
Pickens Mountains-Greenville Mountains-Greater Oconee-
Greater Pickens-Greater Greenville-Spartanburg-Cherokee-York-
Anderson-Abbeville-Laurens-Chester-Greenwood-
613 AM EDT Mon Jul 17 2017

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

.DAY ONE...Today and Tonight.

Isolated to scattered thunderstorms are expected to develop again
across the area this afternoon and evening. The main threats will be
from cloud to ground lightning and locally heavy rainfall. However,
a few storms could become severe, with damaging winds being the
primary threat.

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

..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.
..Friday...No hazardous weather is expected at this time.
..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

JPT

In the hours before

Special weather statement, Jul 17, 7:16 PM EDT, 1 hour 31 minutes before

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Local storm report, Jul 17, 7:18 PM EDT, 1 hour 29 minutes before

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Special weather statement, Jul 17, 7:33 PM EDT, 1 hour 14 minutes before

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Special weather statement, Jul 17, 7:39 PM EDT, 1 hour 8 minutes before

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Local storm report, Jul 17, 8:26 PM EDT, 21 minutes before

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Special weather statement, Jul 17, 8:29 PM EDT, 18 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 17, 9:00 PM EDT	Special Weather Statement	GSP	Henderson	30 min
Jul 18, 3:13 PM EDT	Special Weather Statement	GSP	McDowell	32 min
Jul 18, 3:35 PM EDT	Special Weather Statement	GSP	Buncombe	25 min
Jul 18, 3:41 PM EDT	Severe Thunderstorm Warning	GSP	Avery, Burke, Caldwell	49 min
Jul 18, 4:00 PM EDT	Special Weather Statement	GSP	Buncombe	30 min
Jul 18, 4:03 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	42 min
Jul 18, 4:13 PM EDT	Severe Thunderstorm Warning	GSP	Caldwell	47 min
Jul 18, 4:24 PM EDT	Special Weather Statement	GSP	Mecklenburg	36 min
Jul 18, 4:45 PM EDT	Special Weather Statement	GSP	Union	30 min
Jul 18, 5:14 PM EDT	Special Weather Statement	GSP	Davie	31 min
Jul 18, 5:22 PM EDT	Special Weather Statement	GSP	Union	23 min
Jul 18, 5:34 PM EDT	Special Weather Statement	GSP	Rutherford	26 min
Jul 18, 5:39 PM EDT	Special Weather Statement	GSP	Transylvania	36 min
Jul 18, 5:55 PM EDT	Severe Thunderstorm Warning	GSP	Henderson, Transylvania	50 min
Jul 18, 6:00 PM EDT	Special Weather Statement	GSP	Transylvania	30 min
Jul 18, 6:17 PM EDT	Special Weather Statement	GSP	Henderson	28 min
Jul 18, 6:31 PM EDT	Special Weather Statement	GSP	Stanly	29 min
Jul 18, 6:55 PM EDT	Special Weather Statement	GSP	Cabarrus	35 min
Jul 18, 7:39 PM EDT	Special Weather Statement	GSP	Cabarrus	36 min
Jul 18, 7:40 PM EDT	Special Weather Statement	GSP	Lincoln	35 min
Jul 18, 7:52 PM EDT	Special Weather Statement	GSP	Union	23 min
Jul 17, 8:29 PM EDT	Special Weather Statement	GSP	Greenville	31 min
Jul 17, 9:23 PM EDT	Special Weather Statement	GSP	Greenville	37 min
Jul 18, 2:32 PM EDT	Special Weather Statement	GSP	Oconee	28 min
Jul 18, 2:51 PM EDT	Severe Thunderstorm Warning	GSP	Oconee	39 min
Jul 18, 7:07 PM EDT	Special Weather Statement	GSP	Greenville	23 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.