Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 15, 2021Avery County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 15, 2021, 9:45 PM EDT for Avery County, North Carolina. It was in force for 30 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 15, 2021, 9:45 PM EDT (01:45 UTC)
Expired
Aug 15, 2021, 10:15 PM EDT
In force
30 min
Issued by
NWS Greenville-Spartanburg, SC
Hail
0.25 in
Wind
40

County Avery County, NC

The radar

The Knoxville radar (KMRX), 135 km from the middle of the area, began a volume at 01:47 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 00:00Z, 1.8 hours before the alert went out and 180 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2021-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 463 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2021-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
463 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
1107 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
76 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 15, 7:42 PM EDT, 2 hours 3 minutes earlier.

Area forecast discussion, Aug 15, 7:42 PM EDT, 2 hours 3 minutes before
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Hazardous weather outlook, Aug 15, 5:20 AM EDT, 16 hours 25 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
520 AM EDT Sun Aug 15 2021

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-160930-
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-
520 AM EDT Sun Aug 15 2021

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

.DAY ONE...Today and tonight.

Scattered to numerous thunderstorms will develop across the western
Carolinas and northeast Georgia this afternoon and linger into the
evening. A few of these storms could become quite strong and produce
large hail, heavy rainfall, and damaging winds.

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

Deep tropical moisture associated with the remnants of tropical
storm Fred will interact with an old front and the mountains to
produce periodic heavy rainfall through the middle part of the week.
The flood threat will steadily increase on Monday as showers and
thunderstorms wet the soil. At this time, the greatest potential for
excessive rain appears to be Tuesday and Tuesday night as a remnant
circulation from Fred moves northward to the west of the region.
This could result in a flash flooding threat, especially in areas
that receive multiple rounds of heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

None.

SBK/PM

In the hours before

Special weather statement, Aug 15, 8:18 PM EDT, 1 hour 27 minutes before
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Special weather statement, Aug 15, 8:30 PM EDT, 1 hour 15 minutes before
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Special weather statement, Aug 15, 8:53 PM EDT, 52 minutes before
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Special weather statement, Aug 15, 9:05 PM EDT, 40 minutes before
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Special weather statement, Aug 15, 9:18 PM EDT, 27 minutes before
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Special weather statement, Aug 15, 9:45 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.

IssuedProductOfficeCountiesLasted
Aug 15, 8:06 PM EDTSpecial Weather StatementGSPCleveland24 min
Aug 15, 8:07 PM EDTSpecial Weather StatementGSPTransylvania23 min
Aug 15, 8:09 PM EDTSpecial Weather StatementGSPMcDowell36 min
Aug 15, 8:18 PM EDTSpecial Weather StatementGSPRutherford27 min
Aug 15, 8:30 PM EDTSpecial Weather StatementGSPCatawba, Lincoln30 min
Aug 15, 8:53 PM EDTSpecial Weather StatementGSPTransylvania52 min
Aug 15, 9:05 PM EDTSpecial Weather StatementGSPCatawba25 min
Aug 15, 9:18 PM EDTSpecial Weather StatementGSPMcDowell27 min
Aug 16, 2:52 AM EDTAreal Flood AdvisoryGSPBuncombe, Haywood, Henderson, Jackson, Transylvania3 hr
Aug 16, 3:02 AM EDTFlash Flood WarningGSPHaywood, Jackson, Transylvania5 hr
Aug 16, 4:39 AM EDTFlash Flood WarningGSPJackson, Transylvania3 hr
Aug 16, 4:59 AM EDTFlash Flood WarningGSPHenderson, Transylvania3 hr
Aug 16, 7:43 AM EDTFlash Flood Warning Considerable damage threatGSPTransylvania4 hr
Aug 16, 8:51 AM EDTSpecial Weather StatementGSPCatawba39 min
Aug 16, 9:49 AM EDTSpecial Weather StatementGSPCatawba, Lincoln41 min
Aug 16, 10:24 AM EDTFlash Flood WarningGSPCatawba, Lincoln3 hr
Aug 16, 2:20 PM EDTFlash Flood WatchGSPAvery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more40 hr
Aug 16, 3:46 PM EDTSpecial Weather StatementGSPGaston, Mecklenburg59 min
Aug 16, 4:46 PM EDTSpecial Weather StatementGSPTransylvania59 min
Aug 16, 5:14 PM EDTSpecial Weather StatementGSPDavie, Iredell76 min
Aug 16, 6:53 PM EDTAreal Flood AdvisoryGSPJackson, Transylvania3 hr
Aug 16, 8:33 AM EDTSpecial Weather StatementGSPOconee42 min
Aug 16, 9:23 AM EDTSpecial Weather StatementGSPOconee52 min
Aug 16, 10:12 AM EDTFlash Flood WarningGSPOconee3 hr

Nearby

Special Weather Statements in North Carolina, 2021Every 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.