Alert archive / North Carolina / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 312, NWS Greenville-Spartanburg, SC

August 30, 2018Cabarrus County, Mecklenburg County, Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 30, 2018, 5:28 PM EDT for Cabarrus County, Mecklenburg County, Union County, North Carolina. It was in force for 47 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 30, 2018, 5:28 PM EDT (21:28 UTC)
Expired: Aug 30, 2018, 6:15 PM EDT
In force: 47 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cabarrus County, NC, Mecklenburg County, NC, Union County, NC

The radar

The Columbia radar (KCAE), 147 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 118 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: 1345 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1136 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 62 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 30, 4:53 PM EDT, 35 minutes earlier.

Area forecast discussion, Aug 30, 4:53 PM EDT, 35 minutes before

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Hazardous weather outlook, Aug 30, 5:16 AM EDT, 12 hours 12 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
516 AM EDT Thu Aug 30 2018

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-310930-
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-
516 AM EDT Thu Aug 30 2018

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 showers and thunderstorms are forecast to
develop across the region this afternoon into the early evening, with
the highest coverage across the mountains near the Tennessee border.
The main threats will be from cloud-to-ground lightning and locally
heavy rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

ARK

In the hours before

Special weather statement, Aug 30, 4:02 PM EDT, 1 hour 26 minutes before

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Special weather statement, Aug 30, 4:20 PM EDT, 1 hour 8 minutes before

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Special weather statement, Aug 30, 4:33 PM EDT, 55 minutes before

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Special weather statement, Aug 30, 5:09 PM EDT, 19 minutes before

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Special weather statement, Aug 30, 5:12 PM EDT, 16 minutes before

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Special weather statement, Aug 30, 5:15 PM EDT, 13 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 30, 2:45 PM EDT	Special Weather Statement	GSP	Haywood	45 min
Aug 30, 2:47 PM EDT	Special Weather Statement	GSP	Graham	43 min
Aug 30, 2:53 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Madison, Yancey	26 min
Aug 30, 3:20 PM EDT	Special Weather Statement	GSP	Yancey	25 min
Aug 30, 3:24 PM EDT	Severe Thunderstorm Warning	GSP	Mitchell	36 min
Aug 30, 3:43 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe	32 min
Aug 30, 4:02 PM EDT	Special Weather Statement	GSP	Mitchell	43 min
Aug 30, 4:20 PM EDT	Special Weather Statement	GSP	Buncombe	40 min
Aug 30, 4:33 PM EDT	Special Weather Statement	GSP	Avery	42 min
Aug 30, 5:09 PM EDT	Special Weather Statement	GSP	Avery	51 min
Aug 30, 5:12 PM EDT	Special Weather Statement	GSP	Caldwell	33 min
Aug 30, 5:15 PM EDT	Special Weather Statement	GSP	Burke	30 min
Aug 30, 5:29 PM EDT	Special Weather Statement	GSP	Alexander	31 min
Aug 30, 6:05 PM EDT	Special Weather Statement	GSP	Burke	25 min
Aug 30, 6:36 PM EDT	Special Weather Statement	GSP	Mecklenburg	24 min
Aug 30, 7:00 PM EDT	Special Weather Statement	GSP	Mecklenburg	30 min
Aug 30, 7:08 PM EDT	Special Weather Statement	GSP	Chester	37 min

Nearby

Severe Thunderstorm Warnings in North 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.