Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 11, 2021Graham County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 11, 2021, 8:09 PM EDT for Graham County, North Carolina. It was in force for 36 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 11, 2021, 8:09 PM EDT (00:09 UTC)
Expired: Aug 11, 2021, 8:45 PM EDT
In force: 36 min
Issued by: NWS Greenville-Spartanburg, SC

County Graham County, NC

The radar

The Knoxville radar (KMRX), 87 km from the middle of the area, began a volume at 00:11 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, 0.2 hours before the alert went out and 240 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: 328 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 1363 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 25 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 11, 6:50 PM EDT, 1 hour 19 minutes earlier.

Area forecast discussion, Aug 11, 6:50 PM EDT, 1 hour 19 minutes before

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Hazardous weather outlook, Aug 11, 4:11 PM EDT, 3 hours 58 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
411 PM EDT Wed Aug 11 2021

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-122015-
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-
411 PM EDT Wed Aug 11 2021

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

.DAY ONE...Tonight.

Scattered thunderstorms will continue this afternoon into this
evening across portions of the forecast area. Some of these storms
could become strong to severe. Main impacts are cloud-to-ground
lightning, brief damaging wind gusts, and heavy downpours which may
lead to localized flash flooding.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Local storm report, Aug 11, 7:22 PM EDT, 47 minutes before

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Special weather statement, Aug 11, 7:28 PM EDT, 41 minutes before

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Local storm report, Aug 11, 7:35 PM EDT, 34 minutes before

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Local storm report, Aug 11, 7:39 PM EDT, 30 minutes before

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Local storm report, Aug 11, 7:55 PM EDT, 14 minutes before

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Special weather statement, Aug 11, 8:09 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 11, 8:27 PM EDT	Flash Flood Warning	GSP	Mecklenburg	3 hr
Aug 12, 1:34 PM EDT	Special Weather Statement	GSP	Jackson	26 min
Aug 12, 2:46 PM EDT	Special Weather Statement	GSP	Caldwell	44 min
Aug 12, 2:48 PM EDT	Special Weather Statement	GSP	Transylvania	27 min
Aug 12, 3:23 PM EDT	Special Weather Statement	GSP	Transylvania	37 min
Aug 12, 3:45 PM EDT	Special Weather Statement	GSP	Caldwell	30 min
Aug 12, 3:47 PM EDT	Special Weather Statement	GSP	Alexander	28 min
Aug 12, 4:10 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Burke, Caldwell, Catawba	50 min
Aug 12, 4:13 PM EDT	Special Weather Statement	GSP	Iredell	32 min
Aug 12, 4:26 PM EDT	Special Weather Statement	GSP	Rutherford	34 min
Aug 12, 4:55 PM EDT	Special Weather Statement	GSP	Rowan	35 min
Aug 12, 5:06 PM EDT	Severe Thunderstorm Warning	GSP	Iredell, Rowan	23 min
Aug 12, 5:18 PM EDT	Special Weather Statement	GSP	Burke	27 min
Aug 12, 5:30 PM EDT	Special Weather Statement	GSP	Davie, Rowan	30 min
Aug 12, 6:12 PM EDT	Special Weather Statement	GSP	Polk	33 min
Aug 12, 4:35 PM EDT	Special Weather Statement	GSP	Pickens	25 min
Aug 12, 4:57 PM EDT	Special Weather Statement	GSP	Greenville	33 min

Nearby

Special Weather Statements in North Carolina, 2021 Every special weather statement in 2021

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.