Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 102, NWS Greenville-Spartanburg, SC

August 11, 2021Buncombe County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 11, 2021, 3:51 PM EDT for Buncombe County, North Carolina. It was in force for 39 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, 3:51 PM EDT (19:51 UTC)
Expired
Aug 11, 2021, 4:30 PM EDT
In force
39 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Buncombe County, NC

The radar

The Greer radar (KGSP), 72 km from the middle of the area, began a volume at 19:52 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, 7.9 hours before the alert went out and 232 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 12:00Z on 2021-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 653 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2021-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.1939Sfc1 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
653 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1352 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
-21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

640 
WUUS52 KGSP 111951
SVRGSP
NCC021-112030-
/O.NEW.KGSP.SV.W.0102.210811T1951Z-210811T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
351 PM EDT Wed Aug 11 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Southeastern Buncombe County in western North Carolina...

* Until 430 PM EDT.

* At 351 PM EDT, a severe thunderstorm was located 4 miles southeast
  of Downtown Asheville, or near B.R. Parkway-Nc Arboretum To East
  Asheville, moving southeast at 5 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is expected. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Downtown Asheville, East Asheville, Arden, Black Mountain,
  Swannanoa, Fairview In Buncombe County, Biltmore Forest, Skyland,
  B.R. Parkway-Nc Arboretum To East Asheville and Warren Wilson
  College.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Brief damaging winds will blow down trees and power lines over small
areas. A brief period of large hail is also possible. Seek shelter
inside an interior room.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Please report damaging winds, hail, or flooding to the National
Weather Service by calling toll free, 1, 800, 2 6 7, 8 1 0 1, or by
posting on our Facebook page, or Tweet it using hashtag nwsgsp. Your
message should describe the event and the specific location where it
occurred.

&&

LAT...LON 3560 8229 3559 8229 3555 8223 3548 8230
      3550 8233 3549 8235 3549 8236 3548 8237
      3546 8237 3547 8242 3545 8247 3545 8252
      3553 8261 3568 8248
TIME...MOT...LOC 1951Z 307DEG 5KT 3557 8248 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TDP
1 follow-up statement
695 
WWUS52 KGSP 112025
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
425 PM EDT Wed Aug 11 2021

NCC021-112034-
/O.EXP.KGSP.SV.W.0102.000000T0000Z-210811T2030Z/
Buncombe NC-
425 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUNCOMBE COUNTY
WILL EXPIRE AT 430 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 3560 8229 3559 8229 3555 8223 3548 8230
      3550 8233 3549 8235 3549 8236 3548 8237
      3546 8237 3547 8242 3545 8247 3545 8252
      3553 8261 3568 8248
TIME...MOT...LOC 2024Z 307DEG 5KT 3555 8244 

$$

WJM

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 11, 12:28 PM EDTSpecial Weather StatementGSPHenderson47 min
Aug 11, 1:47 PM EDTSpecial Weather StatementGSPMcDowell28 min
Aug 11, 2:51 PM EDTSpecial Weather StatementGSPBurke24 min
Aug 11, 3:01 PM EDTSevere Thunderstorm WarningGSPBurke, Catawba44 min
Aug 11, 3:24 PM EDTSpecial Weather StatementGSPPolk36 min
Aug 11, 3:53 PM EDTSevere Thunderstorm WarningGSPIredell52 min
Aug 11, 4:01 PM EDTSevere Thunderstorm WarningGSPPolk44 min
Aug 11, 4:03 PM EDTSevere Thunderstorm WarningGSPBurke, Cleveland, Lincoln, Rutherford42 min
Aug 11, 4:24 PM EDTSpecial Weather StatementGSPRutherford36 min
Aug 11, 4:31 PM EDTSpecial Weather StatementGSPIredell29 min
Aug 11, 4:40 PM EDTSevere Thunderstorm WarningGSPCatawba, Iredell50 min
Aug 11, 4:54 PM EDTSpecial Weather StatementGSPRutherford36 min
Aug 11, 5:02 PM EDTSpecial Weather StatementGSPIredell28 min
Aug 11, 5:08 PM EDTSevere Thunderstorm WarningGSPIredell, Rowan34 min
Aug 11, 5:17 PM EDTSevere Thunderstorm WarningGSPCleveland43 min
Aug 11, 5:34 PM EDTSevere Thunderstorm WarningGSPUnion27 min
Aug 11, 5:46 PM EDTSpecial Weather StatementGSPMecklenburg29 min
Aug 11, 5:57 PM EDTSpecial Weather StatementGSPMecklenburg33 min
Aug 11, 6:08 PM EDTSevere Thunderstorm WarningGSPMecklenburg10 min
Aug 11, 6:10 PM EDTSpecial Weather StatementGSPGaston35 min
Aug 11, 6:16 PM EDTSpecial Weather StatementGSPCabarrus29 min
Aug 11, 6:29 PM EDTSevere Thunderstorm WarningGSPCabarrus20 min
Aug 11, 6:47 PM EDTSpecial Weather StatementGSPCabarrus28 min
Aug 11, 6:59 PM EDTAreal Flood AdvisoryGSPCabarrus, Rowan2 hr
Aug 11, 7:28 PM EDTSpecial Weather StatementGSPMecklenburg32 min
Aug 11, 7:31 PM EDTSevere Thunderstorm WarningGSPMecklenburg44 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2021Every severe thunderstorm warning 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.