Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Columbia, SC

June 20, 2021Calhoun County, Lexington County, South Carolina

NWS Columbia, SC issued this special weather statement at Jun 20, 2021, 3:13 PM EDT for Calhoun County, Lexington County, South Carolina. It was in force for 47 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: Jun 20, 2021, 3:13 PM EDT (19:13 UTC)
Expired: Jun 20, 2021, 4:00 PM EDT
In force: 47 min
Issued by: NWS Columbia, SC

Counties Calhoun County, SC, Lexington County, SC

The radar

The Columbia radar (KCAE), 18 km from the middle of the area, began a volume at 19:14 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 nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 7.2 hours before the alert went out and 165 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: 1312 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 848 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

As transmitted.

240 
WWUS82 KCAE 201913
SPSCAE

Special Weather Statement
National Weather Service Columbia SC
313 PM EDT Sun Jun 20 2021
 
SCZ020-026>028-030-035-037-041-135-136-202000-
Central Orangeburg SC-Lexington SC-Barnwell SC-Aiken SC-Calhoun SC-
Bamberg SC-Newberry SC-Richland SC-Saluda SC-
Northwestern Orangeburg SC-
313 PM EDT Sun Jun 20 2021

...Strong Thunderstorms Will Impact Portions of northwestern Central
Orangeburg...Lexington...northeastern Barnwell...northeastern
Aiken...northwestern Calhoun...northwestern Bamberg...southeastern
Newberry...southwestern Richland...southeastern Saluda and
Northwestern Orangeburg Counties Until 400 PM EDT....

At 312 PM EDT...National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Ridge Spring to
8 miles north of Blackville, moving northeast at 30 mph.

  HAZARD...gusty winds 40 mph.

  IMPACT...expect minor damage to tree limbs and blowing around of 
           light, unsecured objects.

Some locations in the path of these storms include...
Lexington, West Columbia, Cayce, Irmo, Batesburg-Leesville,
Springdale, Oak Grove, Highway 6 at Lake Murray Dam, Red Bank, South
Congaree, Pine Ridge, St. Matthews, Gaston, Prosperity, Ridge Spring,
West Columbia Riverwalk, Dreher Island State Park, Congaree National
Park, SC State Farmer's Market and Columbia Metro Airport.

This includes the following highways...
 Interstate 126 near mile marker 1.
 Interstate 20 in South Carolina between mile markers 30 and 63.
 Interstate 26 between mile markers 79 and 87, and between mile
markers 109 and 143.
 Interstate 77 between mile markers 0 and 5.

LAT...LON 3429 8150 3372 8064 3335 8122 3386 8168
TIME...MOT...LOC 1912Z 207DEG 27KT 3387 8159 3347 8124 

$$
awp

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 2:03 AM EDT	Flash Flood Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 12 more	17 hr
Jun 20, 1:18 PM EDT	Special Weather Statement	CAE	Edgefield	42 min
Jun 20, 1:35 PM EDT	Special Weather Statement	CAE	Aiken	25 min
Jun 20, 1:52 PM EDT	Areal Flood Advisory	CAE	Aiken, Fairfield, Kershaw, Lexington, Newberry, Richland	113 min
Jun 20, 2:18 PM EDT	Special Weather Statement	CAE	Aiken	27 min
Jun 20, 2:25 PM EDT	Tornado Warning	CAE	Aiken, Lexington, Saluda	35 min
Jun 20, 3:33 PM EDT	Areal Flood Advisory	CAE	Aiken, Fairfield, Kershaw, Lexington, Newberry, Richland and 1 more	117 min
Jun 20, 3:49 PM EDT	Special Weather Statement	CAE	Lexington, Richland	26 min
Jun 20, 4:04 PM EDT	Flash Flood Warning	CAE	Calhoun, Fairfield, Kershaw, Lexington, Newberry, Richland	3 hr
Jun 20, 4:16 PM EDT	Special Weather Statement	CAE	Richland	44 min
Jun 20, 4:34 PM EDT	Special Weather Statement	CAE	Calhoun, Orangeburg	41 min
Jun 20, 5:03 PM EDT	Special Weather Statement	CAE	Kershaw	27 min
Jun 20, 5:10 PM EDT	Areal Flood Advisory	CAE	Fairfield, Kershaw, Lancaster	3 hr
Jun 20, 5:29 PM EDT	Special Weather Statement	CAE	Clarendon, Lee, Sumter	46 min
Jun 20, 5:35 PM EDT	Special Weather Statement	CAE	Kershaw, Lancaster	55 min
Jun 20, 6:06 PM EDT	Areal Flood Advisory	CAE	Chesterfield, Kershaw, Lancaster	3 hr
Jun 20, 6:31 PM EDT	Special Weather Statement	CAE	Chesterfield	59 min

Nearby

Special Weather Statements in South Carolina, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.