Alert archive / North Carolina / Tornado Warnings in 2021

Tornado Warning 47, NWS Greenville-Spartanburg, SC

August 17, 20215 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this tornado warning at Aug 17, 2021, 4:59 PM EDT for 5 counties in North Carolina. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 17, 2021, 4:59 PM EDT (20:59 UTC)
Expired
Aug 17, 2021, 5:45 PM EDT
In force
46 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Avery County, NC, Burke County, NC, McDowell County, NC, Mitchell County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 120 km from the middle of the area, began a volume at 20:59 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.

What was reported inside it

TimeReportWhereRemark
Aug 17, 5:34 PM EDTTSTM WND DMG3 Wsw Jonas Ridge, NCSMALL TREE LIMBS DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 17, 10:42 AM EDTTornado WatchSPC8 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 9.0 hours before the alert went out and 195 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 2021-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 522 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 2021-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
522 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

050 
WFUS52 KGSP 172059
TORGSP
NCC011-023-111-121-199-172145-
/O.NEW.KGSP.TO.W.0047.210817T2059Z-210817T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Greenville-Spartanburg SC
459 PM EDT Tue Aug 17 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Tornado Warning for...
  Central McDowell County in western North Carolina...
  Mitchell County in western North Carolina...
  Southwestern Avery County in western North Carolina...
  Northeastern Yancey County in western North Carolina...
  West central Burke County in western North Carolina...

* Until 545 PM EDT.
    
* At 459 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 5 miles north of Marion, or 4 miles west of Lake James,
  moving northwest at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Spruce Pine, B.R. Parkway-Craggy To Little Switzerland and B.R. 
  Parkway-Little Switzerland To Linville around 520 PM EDT.
  Bakersville around 540 PM EDT.

Other locations impacted by this dangerous thunderstorm include Nebo,
Buladean, Bandana, Ingalls and North Cove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

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 3572 8183 3565 8203 3610 8233 3615 8219
      3614 8218 3615 8215 3611 8213 3611 8210
      3610 8208 3611 8206 3613 8205 3612 8203
      3615 8201
TIME...MOT...LOC 2059Z 156DEG 27KT 3576 8197 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

RWH
1 follow-up statement
531 
WWUS52 KGSP 172114
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
514 PM EDT Tue Aug 17 2021

NCC023-172124-
/O.CAN.KGSP.TO.W.0047.000000T0000Z-210817T2145Z/
Burke NC-
514 PM EDT Tue Aug 17 2021

...THE TORNADO WARNING FOR WEST CENTRAL BURKE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 PM EDT for western North
Carolina.

LAT...LON 3615 8201 3597 8193 3596 8194 3591 8191
      3589 8191 3577 8211 3610 8233 3615 8219
      3614 8218 3615 8215 3611 8213 3610 8208
      3611 8206 3613 8205 3612 8203
TIME...MOT...LOC 2114Z 143DEG 29KT 3586 8206 

$$

NCC011-111-121-199-172145-
/O.CON.KGSP.TO.W.0047.000000T0000Z-210817T2145Z/
McDowell NC-Mitchell NC-Avery NC-Yancey NC-
514 PM EDT Tue Aug 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR NORTH
CENTRAL MCDOWELL...MITCHELL...SOUTHWESTERN AVERY AND NORTHEASTERN
YANCEY COUNTIES...
    
At 514 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Spruce Pine, moving northwest at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Spruce Pine around 520 PM EDT.
  Bakersville around 540 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Buladean, Bandana, Ingalls, Altamont and Ashford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3615 8201 3597 8193 3596 8194 3591 8191
      3589 8191 3577 8211 3610 8233 3615 8219
      3614 8218 3615 8215 3611 8213 3610 8208
      3611 8206 3613 8205 3612 8203
TIME...MOT...LOC 2114Z 143DEG 29KT 3586 8206 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

RWH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 2:22 AM EDTRiver Flood WarningGSPHenderson, Transylvania4 days
Aug 17, 3:01 AM EDTRiver Flood AdvisoryGSPBuncombe, Henderson79 min
Aug 17, 3:27 AM EDTRiver Flood AdvisoryGSPBuncombe26 hr
Aug 17, 3:59 AM EDTRiver Flood WarningGSPMadison40 hr
Aug 17, 4:12 AM EDTRiver Flood WarningGSPBuncombe31 hr
Aug 17, 4:20 AM EDTRiver Flood WarningGSPBuncombe, Henderson4 days
Aug 17, 11:36 AM EDTTornado Warning Tornado observedGSPAlexander, Iredell39 min
Aug 17, 12:05 PM EDTSpecial Weather StatementGSPIredell25 min
Aug 17, 12:06 PM EDTTornado WarningGSPIredell39 min
Aug 17, 12:33 PM EDTTornado WarningGSPAlexander12 min
Aug 17, 12:42 PM EDTTornado Warning Tornado observedGSPIredell18 min
Aug 17, 1:09 PM EDTFlash Flood WarningGSPJackson, Macon, Transylvania5 hr
Aug 17, 1:25 PM EDTFlash Flood WarningGSPTransylvania4 hr
Aug 17, 1:56 PM EDTSpecial Weather StatementGSPTransylvania34 min
Aug 17, 2:01 PM EDTSpecial Weather StatementGSPCatawba, Lincoln29 min
Aug 17, 2:02 PM EDTSpecial Weather StatementGSPIredell28 min
Aug 17, 2:02 PM EDTSpecial Weather StatementGSPAlexander28 min
Aug 17, 2:31 PM EDTTornado WarningGSPBurke, Caldwell44 min
Aug 17, 2:31 PM EDTTornado WarningGSPMacon19 min
Aug 17, 3:02 PM EDTTornado WarningGSPCaldwell43 min
Aug 17, 3:06 PM EDTTornado WarningGSPAlexander, Caldwell39 min
Aug 17, 3:12 PM EDTFlash Flood WarningGSPHaywood3 hr
Aug 17, 3:41 PM EDTFlash Flood WarningGSPBuncombe5 hr
Aug 17, 3:48 PM EDTTornado WarningGSPAlexander, Burke, Caldwell, Catawba42 min
Aug 17, 4:07 PM EDTTornado WarningGSPAvery, Burke, McDowell, Mitchell53 min
Aug 17, 4:08 PM EDTFlash Flood WarningGSPMadison9 hr
Aug 17, 4:16 PM EDTFlash Flood WarningGSPBuncombe, Henderson5 hr
Aug 17, 4:17 PM EDTTornado WarningGSPAvery, Burke, Caldwell43 min
Aug 17, 4:20 PM EDTTornado WarningGSPHenderson, Polk, Rutherford12 min
Aug 17, 4:24 PM EDTFlash Flood Warning Considerable damage threatGSPHaywood4 hr
Aug 17, 4:35 PM EDTFlash Flood WarningGSPBuncombe, Henderson, Polk, Rutherford8 hr
Aug 17, 4:50 PM EDTFlash Flood WarningGSPMcDowell9 hr
Aug 17, 4:58 PM EDTFlash Flood WarningGSPYancey4 hr
Aug 17, 5:14 PM EDTFlash Flood Warning Considerable damage threatGSPTransylvania4 hr
Aug 17, 5:17 PM EDTRiver Flood WarningGSPHaywood12 hr
Aug 17, 5:26 PM EDTTornado WarningGSPAvery, McDowell, Mitchell, Rutherford, Yancey49 min
Aug 17, 5:28 PM EDTTornado WarningGSPAvery, Burke, Caldwell47 min
Aug 17, 5:32 PM EDTFlash Flood WarningGSPMitchell4 hr
Aug 17, 5:48 PM EDTRiver Flood WarningGSPBuncombe26 hr
Aug 17, 6:00 PM EDTFlash Flood WarningGSPAvery, Burke, Caldwell9 hr
Aug 17, 6:16 PM EDTFlash Flood WarningGSPHenderson, Polk, Rutherford3 hr
Aug 17, 6:42 PM EDTTornado WarningGSPPolk, Rutherford48 min
Aug 17, 6:57 PM EDTFlash Flood WarningGSPBurke, McDowell6 hr
Aug 17, 7:59 PM EDTTornado WarningGSPCleveland46 min

Nearby

Tornado Warnings in North Carolina, 2021Every tornado warning in 2021Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.