Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 147, NWS Greenville-Spartanburg, SC

June 21, 2020McDowell County, Rutherford County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 21, 2020, 7:54 PM EDT for McDowell County, Rutherford County, North Carolina. It was in force for 51 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: Jun 21, 2020, 7:54 PM EDT (23:54 UTC)
Expired: Jun 21, 2020, 8:45 PM EDT
In force: 51 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties McDowell County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 76 km from the middle of the area, began a volume at 23:54 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

Roanoke, VA (KRNK), launched 12:00Z, 11.9 hours before the alert went out and 289 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: 54 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 820 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 69 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 Jun 21, 7:22 PM EDT, 32 minutes earlier.

Area forecast discussion, Jun 21, 7:22 PM EDT, 32 minutes before

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Hazardous weather outlook, Jun 21, 4:57 PM EDT, 2 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
457 PM EDT Sun Jun 21 2020

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-222100-
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 NC-
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-Union SC-Chester-Greenwood-
457 PM EDT Sun Jun 21 2020

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

.DAY ONE...Tonight.

Isolated to scattered thunderstorms will continue to develop into
the evening. Coverage of storms will be better across the mountains.
A few of the storms could become severe with damaging wind gusts and
large hail. Heavy downpours and cloud- to-ground lightning will
accompany many of the storms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Special weather statement, Jun 21, 6:52 PM EDT, 1 hour 2 minutes before

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Special weather statement, Jun 21, 7:11 PM EDT, 43 minutes before

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Special weather statement, Jun 21, 7:17 PM EDT, 37 minutes before

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Special weather statement, Jun 21, 7:40 PM EDT, 14 minutes before

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Special weather statement, Jun 21, 7:50 PM EDT, 4 minutes before

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Local storm report, Jun 21, 7:54 PM EDT, 0 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
Jun 21, 3:29 PM EDT	Special Weather Statement	GSP	Macon	31 min
Jun 21, 5:14 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Haywood, Madison	46 min
Jun 21, 6:01 PM EDT	Special Weather Statement	GSP	Madison	29 min
Jun 21, 6:24 PM EDT	Special Weather Statement	GSP	Graham	36 min
Jun 21, 6:39 PM EDT	Special Weather Statement	GSP	Macon	36 min
Jun 21, 7:11 PM EDT	Special Weather Statement	GSP	Jackson, Macon	49 min
Jun 21, 7:40 PM EDT	Special Weather Statement	GSP	Rutherford	35 min
Jun 21, 7:50 PM EDT	Special Weather Statement	GSP	Polk	25 min
Jun 21, 6:42 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Oconee	31 min
Jun 21, 5:45 PM EDT	Special Weather Statement	GSP	Rabun	30 min
Jun 21, 6:28 PM EDT	Special Weather Statement	GSP	Franklin	32 min
Jun 21, 6:52 PM EDT	Special Weather Statement	GSP	Franklin, Habersham, Rabun, Stephens	23 min
Jun 21, 7:17 PM EDT	Special Weather Statement	GSP	Franklin, Hart	28 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning in 2020

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.