Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Greenville-Spartanburg, SC

August 11, 2021Burke County, Catawba County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 11, 2021, 3:01 PM EDT for Burke County, Catawba County, North Carolina. It was in force for 44 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 11, 2021, 3:01 PM EDT (19:01 UTC)
Expired
Aug 11, 2021, 3:45 PM EDT
In force
44 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Burke County, NC, Catawba County, NC

The radar

The Greer radar (KGSP), 118 km from the middle of the area, began a volume at 19:06 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 11, 3:04 PM EDTTSTM WND DMGMorganton, NCPUBLIC REPORTED TREES DOWN ON POWERLINES ON HILLSIDE LN CAUSING POWER OUTAGE.

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 12:00Z, 7.0 hours before the alert went out and 148 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.

667 
WUUS52 KGSP 111901
SVRGSP
NCC023-035-111945-
/O.NEW.KGSP.SV.W.0099.210811T1901Z-210811T1945Z/

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

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Western Catawba County in the Piedmont of North Carolina...
  Southeastern Burke County in western North Carolina...

* Until 345 PM EDT.

* At 300 PM EDT, a severe thunderstorm was located near Morganton, or
  near Drexel, moving east at 10 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Morganton, Longview, Valdese, Icard, Drexel, Hildebran, Connelly
  Springs, Rutherford College, Lake Rhodhiss and Hickory Regional
  Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3581 8159 3578 8155 3579 8145 3577 8144
      3576 8138 3577 8137 3577 8136 3578 8135
      3559 8136 3564 8172 3582 8171
TIME...MOT...LOC 1900Z 272DEG 10KT 3573 8163 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

TDP
1 follow-up statement
595 
WWUS52 KGSP 111938
SVSGSP

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

NCC023-035-111948-
/O.EXP.KGSP.SV.W.0099.000000T0000Z-210811T1945Z/
Catawba NC-Burke NC-
338 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CATAWBA AND
SOUTHEASTERN BURKE COUNTIES WILL EXPIRE AT 345 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.  However heavy 
rain and lightning are still possible with this thunderstorm.

LAT...LON 3581 8159 3578 8155 3579 8145 3577 8144
      3576 8138 3577 8137 3577 8136 3578 8135
      3559 8136 3564 8172 3582 8171
TIME...MOT...LOC 1938Z 272DEG 10KT 3573 8152 

$$

TDP

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, 3:24 PM EDTSpecial Weather StatementGSPPolk36 min
Aug 11, 3:51 PM EDTSevere Thunderstorm WarningGSPBuncombe39 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.