Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 72, NWS Columbia, SC

August 17, 2021Fairfield County, Newberry County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 17, 2021, 4:25 PM EDT for Fairfield County, Newberry County, South Carolina. It was in force for 50 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: Aug 17, 2021, 4:25 PM EDT (20:25 UTC)
Expired: Aug 17, 2021, 5:15 PM EDT
In force: 50 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Fairfield County, SC, Newberry County, SC

The radar

The Columbia radar (KCAE), 59 km from the middle of the area, began a volume at 20:26 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.

Issued	Product	Office	Lasted
Aug 17, 10:42 AM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.4 hours before the alert went out and 209 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: 1066 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

646 
WUUS52 KCAE 172025
SVRCAE
SCC039-071-172115-
/O.NEW.KCAE.SV.W.0072.210817T2025Z-210817T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
425 PM EDT Tue Aug 17 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Fairfield County in central South Carolina...
  East central Newberry County in central South Carolina...

* Until 515 PM EDT.

* At 424 PM EDT, a severe thunderstorm was located over VC Summer
  Nuclear Station, moving northeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  VC Summer Nuclear Station, Monticello, Blair, Blackstock,
  Jenkinsville and Feasterville Fire Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM EDT for central South
Carolina.

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

&&

LAT...LON 3456 8111 3455 8110 3426 8129 3429 8144
      3457 8140
TIME...MOT...LOC 2024Z 203DEG 20KT 3429 8135 

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

$$

CJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 12:31 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, McCormick, Saluda	59 min
Aug 17, 12:59 PM EDT	Tornado Warning	CAE	Edgefield	46 min
Aug 17, 1:34 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Saluda	56 min
Aug 17, 1:44 PM EDT	Tornado Warning	CAE	Edgefield, McCormick, Saluda	17 min
Aug 17, 1:55 PM EDT	Tornado Warning	CAE	Aiken, Edgefield, Lexington, Saluda	50 min
Aug 17, 2:08 PM EDT	Tornado Warning	CAE	Aiken	37 min
Aug 17, 2:31 PM EDT	Tornado Warning	CAE	Barnwell	44 min
Aug 17, 3:12 PM EDT	Tornado Warning	CAE	Lexington, Saluda	48 min
Aug 17, 3:17 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Newberry, Saluda	58 min
Aug 17, 3:48 PM EDT	Tornado Warning	CAE	Fairfield, Lexington, Newberry, Richland	42 min
Aug 17, 4:31 PM EDT	Areal Flood Advisory	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	59 min
Aug 17, 4:48 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Orangeburg	42 min
Aug 17, 4:56 PM EDT	Tornado Warning	CAE	Orangeburg	34 min
Aug 17, 5:29 PM EDT	Areal Flood Advisory	CAE	Calhoun, Kershaw, Lexington, Richland	3 hr
Aug 17, 5:29 PM EDT	Tornado Warning	CAE	Calhoun, Orangeburg	46 min
Aug 17, 7:43 PM EDT	Special Weather Statement	CAE	Aiken	32 min

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.