Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Greenville-Spartanburg, SC

March 18, 2021Avery County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Mar 18, 2021, 5:22 PM EDT for Avery County, North Carolina. It was in force for 18 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: Mar 18, 2021, 5:22 PM EDT (21:22 UTC)
Expired: Mar 18, 2021, 5:40 PM EDT
In force: 18 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Avery County, NC

The radar

The Knoxville radar (KMRX), 135 km from the middle of the area, began a volume at 21:22 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, 9.4 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-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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 470 m²/s²
0-3 km storm-relative helicity: 562 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

179 
WUUS52 KGSP 182122
SVRGSP
NCC011-182200-
/O.NEW.KGSP.SV.W.0003.210318T2122Z-210318T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
522 PM EDT Thu Mar 18 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Northwestern Avery County in western North Carolina...

* Until 600 PM EDT.

* At 522 PM EDT, a severe thunderstorm was located near Beech
  Mountain, or near Beech Mountain In Avery County, moving east at 10
  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...
  Banner Elk, Elk Park, Beech Mountain In Avery County and Seven
  Devils.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Scattered trees and power lines will be blown down in the warned
area. Seek shelter inside an interior room.

Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg 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 3628 8190 3626 8189 3625 8190 3624 8190
      3623 8191 3621 8191 3619 8188 3619 8186
      3616 8183 3614 8182 3612 8203 3628 8192
TIME...MOT...LOC 2122Z 258DEG 10KT 3620 8194 

HAIL...1.00IN
WIND...60MPH
 
$$

KRENTZ

1 follow-up statement

994 
WWUS52 KGSP 182140
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
540 PM EDT Thu Mar 18 2021

NCC011-182150-
/O.CAN.KGSP.SV.W.0003.000000T0000Z-210318T2200Z/
Avery NC-
540 PM EDT Thu Mar 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN AVERY COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

LAT...LON 3628 8190 3626 8189 3625 8190 3624 8190
      3623 8191 3621 8191 3619 8188 3619 8186
      3616 8183 3614 8182 3612 8203 3628 8192
TIME...MOT...LOC 2130Z 258DEG 10KT 3621 8188 

$$

KRENTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 1:49 PM EDT	Special Weather Statement	GSP	Rutherford	41 min
Mar 18, 2:25 PM EDT	Special Weather Statement	GSP	Cleveland	35 min
Mar 18, 2:58 PM EDT	Special Weather Statement	GSP	Lincoln	47 min
Mar 18, 4:01 PM EDT	Special Weather Statement	GSP	Mecklenburg	29 min
Mar 18, 4:05 PM EDT	Special Weather Statement	GSP	Davie	25 min
Mar 18, 4:26 PM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg	34 min
Mar 18, 4:38 PM EDT	Tornado Warning	GSP	Mecklenburg, Union	37 min
Mar 18, 5:13 PM EDT	Tornado Warning	GSP	Cabarrus, Mecklenburg, Union	31 min
Mar 18, 5:54 PM EDT	Special Weather Statement	GSP	Union	36 min
Mar 18, 6:32 PM EDT	Areal Flood Advisory	GSP	Transylvania	3 hr
Mar 18, 6:52 PM EDT	River Flood Advisory	GSP	Henderson, Transylvania	31 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 2021 Every 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.