Alert archive / South Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 79, NWS Greenville-Spartanburg, SC

July 6, 1999Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 6, 1999, 1:08 PM EDT for Pickens County, South Carolina. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 6, 1999, 1:08 PM EDT (17:08 UTC)
Expired: Jul 6, 1999, 1:40 PM EDT
In force: 32 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Pickens County, SC

The radar

The Greer radar (KGSP), 46 km from the middle of the area, began a volume at 17:12 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.

What was reported inside it

Time	Report	Where	Remark
Jul 6, 1:35 PM EDT	Thunderstorm Wind 50	Pickens, SC

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.1 hours before the alert went out and 235 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: 1066 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 6, 10:00 AM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, Jul 6, 10:00 AM EDT, 3 hours 8 minutes before

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In the hours before

Special weather statement, Jul 6, 10:52 AM EDT, 2 hours 16 minutes before

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Special weather statement, Jul 6, 10:52 AM EDT, 2 hours 16 minutes before

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Local storm report, Jul 6, 11:38 AM EDT, 1 hour 30 minutes before

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Local storm report, Jul 6, 11:38 AM EDT, 1 hour 30 minutes before

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Local storm report, Jul 6, 12:54 PM EDT, 14 minutes before

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Local storm report, Jul 6, 12:54 PM EDT, 14 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 6, 1:03 PM EDT	Severe Thunderstorm Warning	GSP	Jackson	32 min
Jul 6, 1:23 PM EDT	Severe Thunderstorm Warning	GSP	Transylvania	32 min
Jul 6, 6:15 PM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg	45 min
Jul 6, 6:18 PM EDT	Severe Thunderstorm Warning	GSP	Gaston	32 min
Jul 6, 7:00 PM EDT	Severe Thunderstorm Warning	GSP	Rowan	35 min
Jul 6, 7:17 PM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg	33 min
Jul 6, 7:37 PM EDT	Flash Flood Warning	GSP	Rowan	113 min
Jul 6, 12:44 PM EDT	Severe Thunderstorm Warning	GSP	Greenville	46 min
Jul 6, 1:27 PM EDT	Severe Thunderstorm Warning	GSP	Anderson	33 min
Jul 6, 1:45 PM EDT	Severe Thunderstorm Warning	GSP	Oconee, Pickens	50 min
Jul 6, 2:25 PM EDT	Severe Thunderstorm Warning	GSP	Anderson	50 min
Jul 6, 3:13 PM EDT	Severe Thunderstorm Warning	GSP	Abbeville	47 min
Jul 6, 3:55 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	30 min
Jul 6, 4:07 PM EDT	Severe Thunderstorm Warning	GSP	Union	33 min
Jul 6, 4:24 PM EDT	Severe Thunderstorm Warning	GSP	Laurens	31 min
Jul 6, 4:42 PM EDT	Severe Thunderstorm Warning	GSP	Union	33 min
Jul 6, 5:05 PM EDT	Severe Thunderstorm Warning	GSP	Spartanburg	35 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.