Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 75, NWS Columbia, SC

August 31, 2021Columbia County, Lincoln County, McDuffie County, Georgia; Edgefield County, McCormick County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 31, 2021, 2:21 PM EDT for Columbia County, Lincoln County, McDuffie County, Georgia; Edgefield County, McCormick County, South Carolina. It was in force for 39 min. 6 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: Aug 31, 2021, 2:21 PM EDT (18:21 UTC)
Expired: Aug 31, 2021, 3:00 PM EDT
In force: 39 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Edgefield County, SC, McCormick County, SC

The radar

The Columbia radar (KCAE), 129 km from the middle of the area, began a volume at 18:21 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
Aug 31, 2:29 PM EDT	TSTM WND DMG	4 Ne Harlem, GA	COLUMBIA COUNTY SHERIFF OFFICE REPORTED TREES DOWN AT LOUISVILLE AND GRANT ROAD. TIME ESTIMATED BY RADAR.
Aug 31, 2:30 PM EDT	TSTM WND DMG	3 Nw Grovetown, GA	PUBLIC REPORT, VIA SOCIAL MEDIA, OF A TREE DOWN ON FERMOY LANE, ALONG WITH ESTIMATED WIND GUSTS OF 60 MPH. TIME ESTIMATED.
Aug 31, 2:35 PM EDT	TSTM WND DMG	9 S Lincolnton, GA	TREES WERE REPORTED DOWN AT 5500 THOMSON HWY. TIME ESTIMATED.
Aug 31, 2:45 PM EDT	TSTM WND DMG	4 Sse Clarks Hill, SC	TREES DOWN AT HWY 28 AND HOPEWELL CHURCH RD. TIME ESTIMATED.
Aug 31, 2:45 PM EDT	TSTM WND DMG	Modoc, SC	TREES DOWN AT FORREST DR AND BRECKENRIDGE LN. TIME ESTIMATED.
Aug 31, 2:55 PM EDT	TSTM WND DMG	Plum Branch, SC	TREES DOWN AT 284 OLD AUGUSTA RD NEAR PLUM BRANCH. TIME ESTIMATED.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.4 hours before the alert went out and 191 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: 209 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 708 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 283 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

905 
WUUS52 KCAE 311821
SVRCAE
GAC073-181-189-SCC037-065-311900-
/O.NEW.KCAE.SV.W.0075.210831T1821Z-210831T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
221 PM EDT Tue Aug 31 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  McDuffie County in east central Georgia...
  Columbia County in east central Georgia...
  Lincoln County in east central Georgia...
  Southwestern Edgefield County in central South Carolina...
  Central McCormick County in central South Carolina...

* Until 300 PM EDT.

* At 221 PM EDT, severe thunderstorms were located along a line
  extending from near Wrightsboro to near Harlem, moving northeast at
  40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Grovetown, Evans, Thomson, Martinez, McCormick, Harlem, Lincolnton,
  Appling, Clarks Hill Recreation Area, Elijah Clark State Park,
  Riverwood, Mistletoe State Park, Wrightsboro, Hamilton Branch State
  Park, J. Strom Thurmond Dam, Mccormick County Airport,
  Thomson-McDuffie County Airport, Dearing, Parksville and Plum
  Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Severe thunderstorms can produce large capsizing waves and frequent
lightning. If on or near Lake Strom Thurmond move away from the water
and take shelter!

&&

LAT...LON 3361 8263 3364 8261 3363 8258 3365 8258
      3364 8256 3366 8251 3365 8249 3376 8255
      3400 8232 3397 8231 3398 8229 3364 8190
      3332 8235 3354 8262 3360 8265
TIME...MOT...LOC 1821Z 221DEG 36KT 3358 8254 3338 8227 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

awp

1 follow-up statement

355 
WWUS52 KCAE 311839
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
239 PM EDT Tue Aug 31 2021

GAC073-181-189-SCC037-065-311900-
/O.CON.KCAE.SV.W.0075.000000T0000Z-210831T1900Z/
McDuffie GA-Columbia GA-Lincoln GA-Edgefield SC-McCormick SC-
239 PM EDT Tue Aug 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTH CENTRAL MCDUFFIE...COLUMBIA...LINCOLN...SOUTHWESTERN
EDGEFIELD AND CENTRAL MCCORMICK COUNTIES...

At 239 PM EDT, severe thunderstorms were located along a line
extending from near Mistletoe State Park to Evans, moving northeast
at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Evans, Martinez, McCormick, Lincolnton, Appling, Clarks Hill
Recreation Area, Elijah Clark State Park, Riverwood, Mistletoe State
Park, Hamilton Branch State Park, J. Strom Thurmond Dam, Mccormick
County Airport, Parksville, Plum Branch, Scott's Landing, Knox Scout
Reservation, Double Branches, Wildwood Park, New Hope and Riverside
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Severe thunderstorms can produce large capsizing waves and frequent
lightning. If on or near Lake Strom Thurmond move away from the water
and take shelter!

&&

LAT...LON 3363 8248 3366 8251 3365 8249 3376 8255
      3400 8232 3397 8231 3398 8229 3364 8190
      3342 8228 3358 8243 3363 8247
TIME...MOT...LOC 1839Z 221DEG 36KT 3371 8241 3351 8214 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

awp

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 31, 2:09 PM EDT	Special Weather Statement	CAE	Columbia, Lincoln, McDuffie	36 min
Aug 31, 2:59 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick, Newberry, Saluda	46 min
Aug 31, 3:16 PM EDT	Special Weather Statement	CAE	Richland	29 min
Aug 31, 3:24 PM EDT	Special Weather Statement	CAE	Calhoun	36 min
Aug 31, 3:56 PM EDT	Special Weather Statement	CAE	Orangeburg	34 min
Aug 31, 4:11 PM EDT	Special Weather Statement	CAE	Aiken	34 min
Aug 31, 4:37 PM EDT	Special Weather Statement	CAE	Calhoun, Orangeburg	23 min
Aug 31, 4:43 PM EDT	Special Weather Statement	CAE	Kershaw	32 min
Aug 31, 5:07 PM EDT	Special Weather Statement	CAE	Lancaster	38 min
Aug 31, 5:10 PM EDT	Special Weather Statement	CAE	Lexington	35 min
Aug 31, 5:19 PM EDT	Special Weather Statement	CAE	Bamberg	26 min
Aug 31, 6:01 PM EDT	Special Weather Statement	CAE	Chesterfield	29 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021 Severe Thunderstorm Warnings in South 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.