Alert archive / North Carolina / Special Weather Statements in 2020

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 12, 2020Henderson County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 12, 2020, 6:21 PM EDT for Henderson County, North Carolina. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 12, 2020, 6:21 PM EDT (22:21 UTC)
Expired: Aug 12, 2020, 6:45 PM EDT
In force: 24 min
Issued by: NWS Greenville-Spartanburg, SC

County Henderson County, NC

The radar

The Greer radar (KGSP), 69 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 251 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: 911 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 12, 5:38 PM EDT, 43 minutes earlier.

Area forecast discussion, Aug 12, 5:38 PM EDT, 43 minutes before

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Hazardous weather outlook, Aug 12, 2:29 PM EDT, 3 hours 52 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
229 PM EDT Wed Aug 12 2020

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-131830-
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-
229 PM EDT Wed Aug 12 2020

This Hazardous Weather Outlook is for northeast Georgia, Piedmont
North Carolina, western North Carolina, and Upstate South Carolina.

.DAY ONE...This afternoon and tonight.

Scattered to numerous thunderstorms have developed across the region
this afternoon, and these storms will persist into the evening hours
before slowly diminishing overnight. The primary threats from these
storms will be from frequent cloud to ground lightning, locally heavy
rainfall, and gusty winds. Slowly-moving, and occasionally
stationary, thunderstorms and heavy rain showers will pose a threat
of locally excessive rainfall and flash flooding, especially in
locations that have received heavy rainfall over the past few days.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

HG

In the hours before

Special weather statement, Aug 12, 5:11 PM EDT, 1 hour 10 minutes before

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Special weather statement, Aug 12, 5:34 PM EDT, 47 minutes before

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Special weather statement, Aug 12, 5:40 PM EDT, 41 minutes before

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Special weather statement, Aug 12, 5:54 PM EDT, 27 minutes before

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Special weather statement, Aug 12, 6:13 PM EDT, 8 minutes before

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Special weather statement, Aug 12, 6:21 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
Aug 12, 2:35 AM EDT	Special Weather Statement	GSP	Lincoln	40 min
Aug 12, 12:59 PM EDT	Special Weather Statement	GSP	Gaston	31 min
Aug 12, 1:32 PM EDT	Special Weather Statement	GSP	Cleveland	28 min
Aug 12, 1:50 PM EDT	Special Weather Statement	GSP	Polk	25 min
Aug 12, 2:07 PM EDT	Special Weather Statement	GSP	Yancey	23 min
Aug 12, 2:37 PM EDT	Special Weather Statement	GSP	Cleveland	38 min
Aug 12, 3:37 PM EDT	Special Weather Statement	GSP	Avery, Yancey	38 min
Aug 12, 4:09 PM EDT	Special Weather Statement	GSP	Caldwell	51 min
Aug 12, 4:48 PM EDT	Areal Flood Advisory	GSP	Caldwell	3 hr
Aug 12, 4:52 PM EDT	Special Weather Statement	GSP	Mecklenburg	23 min
Aug 12, 5:07 PM EDT	Special Weather Statement	GSP	Alexander	38 min
Aug 12, 5:11 PM EDT	Special Weather Statement	GSP	Buncombe	34 min
Aug 12, 5:27 PM EDT	Areal Flood Advisory	GSP	Alexander, Iredell	3 hr
Aug 12, 5:34 PM EDT	Special Weather Statement	GSP	Mecklenburg	26 min
Aug 12, 5:40 PM EDT	Special Weather Statement	GSP	Davie	35 min
Aug 12, 5:54 PM EDT	Special Weather Statement	GSP	Mecklenburg	36 min
Aug 12, 6:02 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	2 hr
Aug 12, 6:13 PM EDT	Special Weather Statement	GSP	Davie	62 min
Aug 12, 6:44 PM EDT	Special Weather Statement	GSP	Union	46 min
Aug 12, 7:24 PM EDT	Special Weather Statement	GSP	Transylvania	36 min
Aug 12, 7:36 PM EDT	Areal Flood Advisory	GSP	Transylvania	4 hr
Aug 12, 1:37 PM EDT	Special Weather Statement	GSP	Laurens	38 min
Aug 12, 2:19 PM EDT	Special Weather Statement	GSP	Laurens	26 min
Aug 12, 2:44 PM EDT	Special Weather Statement	GSP	Cherokee	46 min
Aug 12, 3:00 PM EDT	Special Weather Statement	GSP	Laurens	30 min
Aug 12, 3:24 PM EDT	Special Weather Statement	GSP	Laurens	36 min
Aug 12, 4:25 PM EDT	Special Weather Statement	GSP	Spartanburg	35 min
Aug 12, 7:28 PM EDT	Special Weather Statement	GSP	Pickens	32 min
Aug 12, 7:19 PM EDT	Special Weather Statement	GSP	Habersham	26 min

Nearby

Special Weather Statements in North Carolina, 2020 Every special weather statement 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.