Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Columbia, SC

June 20, 2021Aiken County, South Carolina

NWS Columbia, SC issued this special weather statement at Jun 20, 2021, 1:35 PM EDT for Aiken County, South Carolina. It was in force for 25 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, 1:35 PM EDT (17:35 UTC)
Expired: Jun 20, 2021, 2:00 PM EDT
In force: 25 min
Issued by: NWS Columbia, SC

County Aiken County, SC

The radar

The Columbia radar (KCAE), 54 km from the middle of the area, began a volume at 17:34 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, 5.6 hours before the alert went out and 171 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.

040 
WWUS82 KCAE 201735
SPSCAE

Special Weather Statement
National Weather Service Columbia SC
135 PM EDT Sun Jun 20 2021
 
SCZ025>027-030-201800-
Lexington SC-Aiken SC-Saluda SC-Edgefield SC-
135 PM EDT Sun Jun 20 2021

...Strong Thunderstorms Will Impact Portions of southwestern
Lexington...northeastern Aiken...southeastern Saluda and eastern
Edgefield Counties Until 200 PM EDT....

At 135 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm over Aiken Municipal Airport, or near Aiken,
moving northeast at 55 mph.

  HAZARD...gusty winds 40 to 50 mph and localized minor flooding.

  IMPACT...expect minor damage to tree limbs and blowing around of 
           light, unsecured objects. Localized minor flooding of low 
           lying and poor drainage areas is also possible.

Some locations in the path of this storm include...
Aiken, Batesburg-Leesville, Aiken Mall, USC Aiken, Citizens Park,
Aiken Municipal Airport, Graniteville, Gilbert, Summit, Monetta,
Fredonia, Hopeland Gardens, Murray, Camp Kinard, Delmar, Hibernia,
Steedman, Kneece, New Holland and Samaria Fire Station.

Heavy rainfall is occurring with this storm, and may cause localized
flooding. Do not drive your vehicle through flooded roadways.

This includes Interstate 20 in South Carolina between mile markers 16
and 48.
 
LAT...LON 3346 8171 3356 8182 3404 8152 3383 8122
TIME...MOT...LOC 1735Z 211DEG 47KT 3363 8165 

$$
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, 1:52 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, 3:13 PM EDT	Special Weather Statement	CAE	Calhoun, Lexington	47 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.