Alert archive / North Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 140, NWS Greenville-Spartanburg, SC

August 14, 2021Mecklenburg County, Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Aug 14, 2021, 3:39 PM EDT for Mecklenburg County, Union County, North Carolina. It was in force for 51 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 14, 2021, 3:39 PM EDT (19:39 UTC)
Expired
Aug 14, 2021, 4:30 PM EDT
In force
51 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Mecklenburg County, NC, Union County, NC

The radar

The Columbia radar (KCAE), 119 km from the middle of the area, began a volume at 19:42 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 14, 4:15 PM EDTTSTM WND DMG2 Nnw Waxhaw, NCTREES DOWN NEAR CUTHBERTSON RD & S PROVIDENCE RD.

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, 7.7 hours before the alert went out and 143 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 2021-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1624 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 2021-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
1624 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
954 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

851 
WUUS52 KGSP 141939
SVRGSP
NCC119-179-142030-
/O.NEW.KGSP.SV.W.0140.210814T1939Z-210814T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
339 PM EDT Sat Aug 14 2021

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Southeastern Mecklenburg County in the Piedmont of North
  Carolina...
  Western Union County in the Piedmont of North Carolina...

* Until 430 PM EDT.

* At 339 PM EDT, a severe thunderstorm was located 4 miles west of
  Monroe, or near Wesley Chapel, moving west 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...
  Monroe, Matthews, Indian Trail, Weddington, Stallings, Unionville,
  Wesley Chapel, Wingate, Waxhaw and Lake Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

Torrential rainfall is occurring with this storm, and may lead to
minor flooding. Do not drive your vehicle through flooded roadways.

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 3482 8046 3482 8080 3494 8078 3501 8084
      3517 8072 3506 8043
TIME...MOT...LOC 1939Z 103DEG 5KT 3498 8061 

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

$$

HG
2 follow-up statements
765 
WWUS52 KGSP 142013
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
413 PM EDT Sat Aug 14 2021

NCC119-142022-
/O.CAN.KGSP.SV.W.0140.000000T0000Z-210814T2030Z/
Mecklenburg NC-
413 PM EDT Sat Aug 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MECKLENBURG
COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved south 
of Mecklenburg County. Therefore, the warning has been cancelled 
fore Mecklenburg County.

LAT...LON 3482 8046 3482 8080 3494 8078 3501 8083
      3505 8075 3514 8064 3514 8063 3502 8046
      3497 8044
TIME...MOT...LOC 2012Z 043DEG 13KT 3488 8073 

$$

NCC179-142030-
/O.CON.KGSP.SV.W.0140.000000T0000Z-210814T2030Z/
Union NC-
413 PM EDT Sat Aug 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR WESTERN UNION COUNTY...

At 412 PM EDT, a severe thunderstorm was located 10 miles southeast
of Indian Land, or near Waxhaw, moving southwest at 15 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...
Monroe, Indian Trail, Weddington, Stallings, Wesley Chapel, Wingate,
Waxhaw, Lake Park, Mineral Springs and Hemby Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 3482 8046 3482 8080 3494 8078 3501 8083
      3505 8075 3514 8064 3514 8063 3502 8046
      3497 8044
TIME...MOT...LOC 2012Z 043DEG 13KT 3488 8073 

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

$$

HG
954 
WWUS52 KGSP 142026
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
426 PM EDT Sat Aug 14 2021

NCC179-142036-
/O.EXP.KGSP.SV.W.0140.000000T0000Z-210814T2030Z/
Union NC-
426 PM EDT Sat Aug 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN UNION 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.  However, gusty 
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3482 8046 3482 8080 3494 8078 3501 8083
      3505 8075 3514 8064 3514 8063 3502 8046
      3497 8044
TIME...MOT...LOC 2026Z 103DEG 5KT 3488 8075 

$$

HG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:37 PM EDTSpecial Weather StatementGSPCabarrus23 min
Aug 13, 9:10 PM EDTSpecial Weather StatementGSPCabarrus35 min
Aug 13, 11:13 PM EDTSpecial Weather StatementGSPRowan32 min
Aug 13, 11:15 PM EDTSevere Thunderstorm WarningGSPDavie, Rowan45 min
Aug 13, 11:45 PM EDTSpecial Weather StatementGSPCabarrus30 min
Aug 13, 11:49 PM EDTSpecial Weather StatementGSPRowan26 min
Aug 14, 12:10 AM EDTSpecial Weather StatementGSPRowan35 min
Aug 14, 12:17 AM EDTSpecial Weather StatementGSPCabarrus28 min
Aug 14, 12:31 AM EDTAreal Flood AdvisoryGSPRowan119 min
Aug 14, 12:33 AM EDTSevere Thunderstorm WarningGSPCabarrus, Rowan42 min
Aug 14, 1:02 AM EDTSpecial Weather StatementGSPRowan28 min
Aug 14, 1:13 AM EDTSpecial Weather StatementGSPRowan32 min
Aug 14, 1:32 AM EDTAreal Flood AdvisoryGSPCabarrus, Rowan118 min
Aug 14, 1:37 AM EDTSpecial Weather StatementGSPRowan23 min
Aug 14, 2:03 AM EDTFlash Flood WarningGSPCabarrus117 min
Aug 14, 2:17 PM EDTSpecial Weather StatementGSPLincoln28 min
Aug 14, 2:19 PM EDTSpecial Weather StatementGSPUnion26 min
Aug 14, 2:33 PM EDTSevere Thunderstorm WarningGSPMecklenburg, Union42 min
Aug 14, 2:43 PM EDTSevere Thunderstorm WarningGSPUnion47 min
Aug 14, 2:46 PM EDTSpecial Weather StatementGSPCatawba, Lincoln29 min
Aug 14, 2:53 PM EDTSevere Thunderstorm WarningGSPCatawba, Lincoln33 min
Aug 14, 3:04 PM EDTSevere Thunderstorm WarningGSPHenderson, Transylvania21 min
Aug 14, 3:13 PM EDTSevere Thunderstorm WarningGSPMecklenburg47 min
Aug 14, 3:30 PM EDTSpecial Weather StatementGSPMecklenburg30 min
Aug 14, 4:00 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan45 min
Aug 14, 4:08 PM EDTSpecial Weather StatementGSPBurke37 min
Aug 14, 4:12 PM EDTAreal Flood AdvisoryGSPMecklenburg96 min
Aug 14, 4:22 PM EDTSevere Thunderstorm WarningGSPBuncombe, Henderson53 min
Aug 14, 4:25 PM EDTSevere Thunderstorm WarningGSPBurke, Caldwell50 min
Aug 14, 4:28 PM EDTSpecial Weather StatementGSPUnion32 min
Aug 14, 4:33 PM EDTSevere Thunderstorm WarningGSPDavie, Iredell, Rowan42 min
Aug 14, 4:34 PM EDTSevere Thunderstorm WarningGSPBurke, McDowell, Rutherford41 min
Aug 14, 4:35 PM EDTSevere Thunderstorm WarningGSPMcDowell, Rutherford40 min
Aug 14, 4:45 PM EDTSpecial Weather StatementGSPTransylvania30 min
Aug 14, 4:55 PM EDTSevere Thunderstorm WarningGSPBurke, McDowell, Rutherford50 min
Aug 14, 5:01 PM EDTSpecial Weather StatementGSPBuncombe29 min
Aug 14, 5:14 PM EDTSpecial Weather StatementGSPIredell31 min
Aug 14, 5:16 PM EDTSpecial Weather StatementGSPPolk29 min
Aug 14, 5:27 PM EDTAreal Flood AdvisoryGSPCaldwell2 hr
Aug 14, 5:42 PM EDTSpecial Weather StatementGSPJackson33 min
Aug 14, 5:44 PM EDTSpecial Weather StatementGSPPolk31 min
Aug 14, 5:53 PM EDTSpecial Weather StatementGSPHenderson37 min
Aug 14, 6:02 PM EDTAreal Flood AdvisoryGSPMcDowell118 min
Aug 14, 6:20 PM EDTSpecial Weather StatementGSPSwain25 min
Aug 14, 6:51 PM EDTAreal Flood AdvisoryGSPBuncombe, McDowell, Rutherford114 min
Aug 14, 7:38 PM EDTAreal Flood AdvisoryGSPBuncombe, Henderson112 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.