Alert archive / South Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 21, NWS Greenville-Spartanburg, SC

January 11, 2020Chester County, York County, South Carolina; Mecklenburg County, Union County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jan 11, 2020, 9:55 PM EST for Chester County, York County, South Carolina; Mecklenburg County, Union County, North Carolina. It was in force for 65 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
Jan 11, 2020, 9:55 PM EST (02:55 UTC)
Expired
Jan 11, 2020, 11:00 PM EST
In force
65 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Mecklenburg County, NC, Union County, NC, Chester County, SC, York County, SC

The radar

The Columbia radar (KCAE), 116 km from the middle of the area, began a volume at 02:57 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 watch it was issued in

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

IssuedProductOfficeLasted
Jan 11, 5:38 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.9 hours before the alert went out and 147 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 00:00Z on 2020-01-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 00:00Z on 2020-01-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 426 square meters per square second.19395878Sfc1 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
16 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
426 m²/s²
0-3 km storm-relative helicity
489 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

353 
WUUS52 KGSP 120255
SVRGSP
NCC119-179-SCC023-091-120400-
/O.NEW.KGSP.SV.W.0021.200112T0255Z-200112T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
955 PM EST Sat Jan 11 2020

The National Weather Service in Greenville-Spartanburg has issued a

* Severe Thunderstorm Warning for...
  Southern Mecklenburg County in the Piedmont of North Carolina...
  Union County in the Piedmont of North Carolina...
  Eastern Chester County in Upstate South Carolina...
  Eastern York County in Upstate South Carolina...

* Until 1100 PM EST.

* At 955 PM EST, severe thunderstorms were located along a line
  extending from 7 miles south of Gastonia to 12 miles southeast of
  Chester, moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Rock Hill, Monroe, South Charlotte, Southwest Charlotte, Matthews,
  Mint Hill, Indian Trail, Weddington, Fort Mill and Stallings.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Conditions are favorable for the development of brief, weak
tornadoes. 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.

&&

A Tornado Watch remains in effect until midnight EST for the Piedmont
of North Carolina...and Upstate South Carolina.

LAT...LON 3481 8032 3482 8080 3494 8078 3508 8091
      3501 8091 3492 8086 3484 8087 3483 8090
      3470 8086 3464 8090 3455 8087 3456 8111
      3516 8115 3515 8102 3517 8100 3521 8055
      3516 8044 3518 8037 3517 8036 3519 8028
TIME...MOT...LOC 0255Z 254DEG 48KT 3515 8112 3457 8108 

HAIL...<.75IN
WIND...60MPH
 
$$

MOORE
1 follow-up statement
546 
WWUS52 KGSP 120323
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
1023 PM EST Sat Jan 11 2020

SCC023-091-120332-
/O.CAN.KGSP.SV.W.0021.000000T0000Z-200112T0400Z/
Chester SC-York SC-
1023 PM EST Sat Jan 11 2020

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHESTER AND EASTERN
YORK COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area, therefore the warning has been cancelled.

A Tornado Watch remains in effect until midnight EST for the Piedmont
of North Carolina.

LAT...LON 3481 8032 3482 8080 3494 8078 3501 8084
      3518 8088 3521 8055 3516 8044 3518 8037
      3517 8036 3519 8028
TIME...MOT...LOC 0322Z 265DEG 40KT 3519 8065 3503 8063 3485 8065 

$$

NCC119-179-120400-
/O.CON.KGSP.SV.W.0021.000000T0000Z-200112T0400Z/
Mecklenburg NC-Union NC-
1023 PM EST Sat Jan 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EST
FOR SOUTHEASTERN MECKLENBURG AND UNION COUNTIES...

At 1022 PM EST, severe thunderstorms were located along a line
extending from 11 miles east of Uptown Charlotte to 5 miles northwest
of Monroe to 11 miles northeast of Lancaster, moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Monroe, South Charlotte, Matthews, Mint Hill, Indian Trail,
Weddington, Stallings, Unionville, Wesley Chapel and Wingate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Conditions are favorable for the development of brief, weak
tornadoes. 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.

&&

A Tornado Watch remains in effect until midnight EST for the Piedmont
of North Carolina.

LAT...LON 3481 8032 3482 8080 3494 8078 3501 8084
      3518 8088 3521 8055 3516 8044 3518 8037
      3517 8036 3519 8028
TIME...MOT...LOC 0322Z 265DEG 40KT 3519 8065 3503 8063 3485 8065 

HAIL...<.75IN
WIND...60MPH
 
$$

MOORE

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 11, 7:13 PM ESTSevere Thunderstorm WarningGSPGreenville, Pickens62 min
Jan 11, 7:39 PM ESTSevere Thunderstorm WarningGSPAnderson, Oconee51 min
Jan 11, 7:54 PM ESTTornado WarningGSPAnderson36 min
Jan 11, 8:21 PM ESTSevere Thunderstorm WarningGSPAbbeville, Greenwood39 min
Jan 11, 8:29 PM ESTSevere Thunderstorm WarningGSPAnderson, Greenville, Laurens, Pickens, Spartanburg45 min
Jan 11, 8:34 PM ESTTornado WarningGSPAbbeville, Greenwood, Laurens26 min
Jan 11, 8:56 PM ESTSevere Thunderstorm WarningGSPGreenwood, Laurens, Spartanburg, Union49 min
Jan 11, 8:59 PM ESTSevere Thunderstorm WarningGSPCherokee, Spartanburg, Union46 min
Jan 11, 9:21 PM ESTSevere Thunderstorm WarningGSPCherokee, Chester, Union, York39 min
Jan 11, 9:36 PM ESTTornado WarningGSPChester, Union, York24 min
Jan 11, 7:02 PM ESTSevere Thunderstorm WarningGSPBuncombe, Haywood, Henderson, Transylvania43 min
Jan 11, 7:19 PM ESTAreal Flood AdvisoryGSPHenderson, Transylvania4 hr
Jan 11, 7:32 PM ESTSevere Thunderstorm WarningGSPBuncombe, Henderson, McDowell, Polk, Rutherford, Yancey31 min
Jan 11, 7:53 PM ESTSevere Thunderstorm WarningGSPBurke, McDowell, Mitchell, Polk, Rutherford, Yancey52 min
Jan 11, 8:02 PM ESTSevere Thunderstorm WarningGSPAvery, Burke, Caldwell43 min
Jan 11, 8:22 PM ESTSevere Thunderstorm WarningGSPAlexander, Burke, Caldwell, Catawba, Cleveland, Lincoln and 2 more53 min
Jan 11, 8:57 PM ESTSevere Thunderstorm WarningGSPAlexander, Catawba, Cleveland, Gaston, Iredell, Lincoln48 min
Jan 11, 9:36 PM ESTFlash Flood WarningGSPMcDowell3 hr
Jan 11, 9:41 PM ESTSevere Thunderstorm WarningGSPCabarrus, Catawba, Davie, Gaston, Iredell, Lincoln and 2 more49 min
Jan 11, 10:19 PM ESTSevere Thunderstorm WarningGSPCabarrus, Davie, Mecklenburg, Rowan41 min
Jan 11, 10:31 PM ESTTornado WarningGSPUnion17 min
Jan 11, 10:46 PM ESTRiver Flood AdvisoryGSPBuncombe, Henderson22 hr
Jan 11, 11:05 PM ESTRiver Flood AdvisoryGSPHenderson, Transylvania8 hr
Jan 11, 11:06 PM ESTAreal Flood WarningGSPHenderson, Transylvania3 hr
Jan 12, 1:03 AM ESTAreal Flood AdvisoryGSPBurke, Caldwell4 hr
Jan 12, 2:44 AM ESTAreal Flood AdvisoryGSPTransylvania6 hr
Jan 12, 5:32 AM ESTAreal Flood AdvisoryGSPBurke, Caldwell6 hr
Jan 12, 6:54 AM ESTRiver Flood WarningGSPHenderson, Transylvania50 hr

Nearby

Severe Thunderstorm Warnings in South Carolina, 2020Severe Thunderstorm Warnings in North Carolina, 2020Every severe thunderstorm warning in 2020

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.