Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 73, NWS Columbia, SC

August 17, 2021Bamberg County, Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Aug 17, 2021, 4:48 PM EDT for Bamberg County, Orangeburg County, South Carolina. It was in force for 42 min. 3 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 17, 2021, 4:48 PM EDT (20:48 UTC)
Expired: Aug 17, 2021, 5:30 PM EDT
In force: 42 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bamberg County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 54 km from the middle of the area, began a volume at 20:48 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 17, 5:33 PM EDT	TSTM WND DMG	6 Nnw Brookdale, SC	PUBLIC REPORTED A FUNNEL CLOUD DROPPED DOWN NEAR CHURCH ALONG NEW HOPE AND COLUMBIA RD. EM FOUND 100 YD OF TREES FALLEN IN MULTIPLE DIRECTIONS. POSSIBLY TORNADO DAMAGE. TIME ESTIMATED FROM RADAR.
Aug 17, 5:33 PM EDT	TSTM WND DMG	6 Nnw Brookdale, SC	SC HIGHWAY PATROL REPORTS TREE ON ROADWAY AT COLUMBIA ROAD AND NEW HOPE ROAD. TIME ESTIMATED BY RADAR.
Aug 17, 5:40 PM EDT	TORNADO	6 Nnw Brookdale, SC	THE NATIONAL WEATHER SERVICE STORM SURVEY TEAM CONFIRMED A LOW-END EF1 TORNADO JUST NORTH-NORTHWEST OF THE CITY OF ORANGEBURG. THE TORNADO HAD A PATH LENGTH JUST UNDER 1 MILE, A WIDTH THAT RANGED FROM 25 TO 50 YARDS, PEAK WINDS OF 88 MPH, AND WAS ON THE GROUND

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

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, 8.8 hours before the alert went out and 106 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.

906 
WUUS52 KCAE 172048
SVRCAE
SCC009-075-172130-
/O.NEW.KCAE.SV.W.0073.210817T2048Z-210817T2130Z/

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

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Central Bamberg County in central South Carolina...
  Central Orangeburg County in central South Carolina...

* Until 530 PM EDT.

* At 448 PM EDT, a severe thunderstorm was located near Bamberg,
  moving north at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Orangeburg, Bamberg, Brookdale, Branchville, Orangeburg County
  Airport, Claflin College, Edisto Gardens, South Carolina State
  University, Rowesville, Cordova, Cope, Wilkinson Heights, Prince of
  Orange Mall and Edisto.

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 3325 8108 3367 8101 3363 8097 3364 8094
      3361 8094 3362 8087 3361 8081 3352 8069
      3351 8070 3350 8069 3320 8086
TIME...MOT...LOC 2048Z 196DEG 27KT 3329 8096 

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, 4:25 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	50 min
Aug 17, 4:31 PM EDT	Areal Flood Advisory	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	59 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.