Alert archive / North Carolina / Tornado Warnings in 2021

Tornado Warning 15, NWS Greenville-Spartanburg, SC

April 10, 20214 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this tornado warning at Apr 10, 2021, 8:15 PM EDT for 4 counties in North Carolina. It was in force for 45 min. 2 reports 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: Apr 10, 2021, 8:15 PM EDT (00:15 UTC)
Expired: Apr 10, 2021, 9:00 PM EDT
In force: 45 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, Caldwell County, NC, McDowell County, NC

The radar

The Greer radar (KGSP), 107 km from the middle of the area, began a volume at 00:19 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

Time	Report	Where	Remark
Apr 10, 8:15 PM EDT	TSTM WND DMG	Nebo, NC	BROADCAST MEDIA REPORTED DAMAGE TO METAL ROOF AND BROKEN CHIMNEY ON HOME IN THE MUD CREEK AREA.
Apr 10, 8:30 PM EDT	TSTM WND DMG	4 Nne Glen Alpine, NC	BROADCAST MEDIA REPORTED NUMEROUS TREES DOWN ON HWY 181 AT BOWMAN AVE

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.3 hours before the alert went out and 176 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: 205 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 741 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 261 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

998 
WFUS52 KGSP 110015
TORGSP
NCC011-023-027-111-110100-
/O.NEW.KGSP.TO.W.0015.210411T0015Z-210411T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Greenville-Spartanburg SC
815 PM EDT Sat Apr 10 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Tornado Warning for...
  Northeastern McDowell County in western North Carolina...
  West central Caldwell County in western North Carolina...
  Southeastern Avery County in western North Carolina...
  Western Burke County in western North Carolina...

* Until 900 PM EDT.
    
* At 815 PM EDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles east of Marion, or near Lake James State Park,
  moving north 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...
  Glen Alpine around 820 PM EDT.
  Table Rock around 840 PM EDT.
  B.R. Parkway-Linville Falls To Grandfather around 900 PM EDT.

Other locations impacted by this dangerous thunderstorm include Nebo,
Edgemont, Collettsville, Oak Hill and Jonas Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A brief, weak tornado is likely. Mobile homes could be flipped.
Falling trees can cause death or serious injury, and major damage to
houses. Move to a basement or an interior room on the lowest floor of
a sturdy building.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

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 3563 8183 3566 8194 3603 8189 3598 8163
TIME...MOT...LOC 0015Z 196DEG 25KT 3570 8187 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

8

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:31 PM EDT	Special Weather Statement	GSP	Alexander, Catawba, Iredell	44 min
Apr 10, 8:38 PM EDT	Special Weather Statement	GSP	Cabarrus, Mecklenburg, Union	52 min
Apr 10, 8:46 PM EDT	Severe Thunderstorm Warning	GSP	Caldwell	44 min
Apr 10, 9:26 PM EDT	Special Weather Statement	GSP	Davie, Iredell	34 min
Apr 10, 9:35 PM EDT	Special Weather Statement	GSP	Cabarrus, Rowan	25 min

Nearby

Tornado Warnings in North Carolina, 2021 Every tornado warning in 2021 Tornadoes 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.