Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 9, NWS Columbia, SC

February 15, 2017Clarendon County, Orangeburg County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Feb 15, 2017, 11:49 AM EST for Clarendon County, Orangeburg County, South Carolina. It was in force for 26 min. 2 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: Feb 15, 2017, 11:49 AM EST (16:49 UTC)
Expired: Feb 15, 2017, 12:15 PM EST
In force: 26 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Clarendon County, SC, Orangeburg County, SC

The radar

The Columbia radar (KCAE), 94 km from the middle of the area, began a volume at 16:51 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
Feb 15, 11:53 AM EST	TSTM WND DMG	1 Nne Santee, SC	DOT REPORTED A TREE DOWN ON HWY 6 NEAR THE SANTEE GOLF COURSE.
Feb 15, 12:00 PM EST	HAIL 1.25	2 Ssw Holly Hill, SC	PUBLIC REPORTED HALF DOLLAR SIZED HAIL AT A BUSINESS SOUTH OF HOLLY HILL ON GARDNER BLVD/HWY 453. .

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

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 4.8 hours before the alert went out and 63 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

126 
WUUS52 KCAE 151649
SVRCAE
SCC027-075-151715-
/O.NEW.KCAE.SV.W.0009.170215T1649Z-170215T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
1149 AM EST WED FEB 15 2017

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  South central Clarendon County in central South Carolina...
  Southeastern Orangeburg County in central South Carolina...

* Until 1215 PM EST

* At 1149 AM EST, a severe thunderstorm was located near Indian
  Field, or 20 miles southeast of Brookdale, moving east at 60 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Holly Hill, Bowman, Santee, Eutawville and Vance. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 3348 8015 3346 8013 3345 8015 3346 8016
      3345 8022 3330 8025 3327 8030 3328 8035
      3326 8036 3326 8043 3329 8049 3333 8049
      3333 8051 3322 8072 3347 8063 3347 8061
      3349 8062 3351 8010
TIME...MOT...LOC 1649Z 265DEG 52KT 3331 8058 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

WRS

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 15, 7:59 AM EST	Special Weather Statement	CAE	Edgefield, McCormick, Saluda	46 min
Feb 15, 8:38 AM EST	Special Weather Statement	CAE	Edgefield	52 min
Feb 15, 8:57 AM EST	Special Weather Statement	CAE	Lexington, Richland	63 min
Feb 15, 9:07 AM EST	Special Weather Statement	CAE	Aiken	38 min
Feb 15, 10:06 AM EST	Special Weather Statement	CAE	Bamberg, Barnwell, Calhoun, Clarendon, Orangeburg, Sumter	54 min
Feb 15, 10:35 AM EST	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Orangeburg, Sumter	40 min
Feb 15, 10:50 AM EST	Tornado Warning	CAE	Aiken, Barnwell	29 min
Feb 15, 11:09 AM EST	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	54 min
Feb 15, 11:38 AM EST	Tornado Warning	CAE	Bamberg, Orangeburg	16 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017 Every severe thunderstorm warning in 2017

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.