Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 86, NWS Columbia, SC

May 29, 2017Edgefield County, McCormick County, South Carolina; Lincoln County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at May 29, 2017, 5:35 PM EDT for Edgefield County, McCormick County, South Carolina; Lincoln County, Georgia. It was in force for 55 min. 9 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: May 29, 2017, 5:35 PM EDT (21:35 UTC)
Expired: May 29, 2017, 6:30 PM EDT
In force: 55 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Lincoln County, GA, Edgefield County, SC, McCormick County, SC

The radar

The Columbia radar (KCAE), 97 km from the middle of the area, began a volume at 21:35 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
May 29, 5:50 PM EDT	TSTM WND DMG	1 S Plum Branch, SC	HAM RADIO OPERATOR REPORTS TREES DOWN PLUM BRANCH RD/HWY 230.
May 29, 5:50 PM EDT	HAIL 0.88	1 Ssw Plum Branch, SC	HAM RADIO OPERATOR REPORTS NICKEL-SIZE HAIL ALONG PLUM BRANCH ROAD NEAR BEAVER CREEK RANGE.
May 29, 6:12 PM EDT	HAIL 1.5	7 Wnw Edgefield, SC	1.5-INCH HAIL REPORTED ON JONES ROAD. RECEIVED VIA SOCIAL MEDIA.
May 29, 6:12 PM EDT	HAIL 2.75	11 Nw Edgefield, SC	EDGEFIELD COUNTY EM REPORTS BASEBALL-SIZE HAIL HWY 25 AND HWY 378.
May 29, 6:18 PM EDT	TSTM WND DMG	7 Wnw Edgefield, SC	SCHP REPORTS TREE IN ROADWAY SC283 AND WALKER ROAD.
May 29, 6:20 PM EDT	TSTM WND DMG	4 Nw Edgefield, SC	EDGEFIELD COUNTY DISPATCH REPORTS MULTIPLE TREES DOWN HWY 25 AND HWY 283 INTERSECTION AREA.
May 29, 6:20 PM EDT	HAIL 1.75	4 Nw Edgefield, SC	EDGEFIELD COUNTY DISPATCH REPORTS GOLF-BALL SIZE HAIL OBSERVED HWY 25 AND HWY 283 INTERSECTION AREA.
May 29, 6:20 PM EDT	HAIL 1.75	5 Nw Edgefield, SC	GOLF BALL-SIZE HAIL REPORTED ON HWY 25 NW OF EDGEFIELD. RECEIVED VIA SOCIAL MEDIA.
May 29, 6:30 PM EDT	HAIL 1.75	9 N Edgefield, SC	EDGEFIELD COUNTY EM REPORTS HAIL RANGING FROM PEA-SIZE TO A LITTLE LARGER THAN GOLF-BALL SIZE. SEVERAL REPORTS OF DAMAGED VEHICLES. MAJOR IMPACT AREA LONG CANE RD AND HWY 378 WEST TO MCCORMICK COUNTY LINE.

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
May 29, 3:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.6 hours before the alert went out and 224 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: 27 J/kg
Mixed-layer CIN: -236 J/kg
Mixed-layer LCL: 1043 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: -88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

128 
WUUS52 KCAE 292135
SVRCAE
GAC181-SCC037-065-292230-
/O.NEW.KCAE.SV.W.0086.170529T2135Z-170529T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
535 PM EDT MON MAY 29 2017

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  East central Lincoln County in east central Georgia...
  Edgefield County in central South Carolina...
  McCormick County in central South Carolina...

* Until 630 PM EDT

* At 533 PM EDT, a severe thunderstorm was located near Lincolnton,
  or 22 miles north of Thomson, moving east at 25 mph.

  HAZARD...70 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings. 

* Locations impacted include...
  Edgefield, McCormick, Trenton, Parksville, Plum Branch and Modoc. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a DANGEROUS SITUATION. Trees reported down in Lincoln County 
Georgia. SEEK SHELTER NOW inside a sturdy structure and stay away 
from windows!

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.

If on or near Strom Thurmond Lake get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 3403 8232 3397 8230 3402 8224 3398 8221
      3397 8218 3399 8215 3398 8205 3395 8204
      3398 8191 3374 8179 3368 8215 3369 8229
      3403 8244
TIME...MOT...LOC 2133Z 262DEG 23KT 3379 8240 

HAIL...1.00IN
WIND...70MPH
 
$$

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 8:09 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Lexington, Orangeburg, Sumter	42 min
May 28, 8:44 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon, Sumter	31 min
May 29, 4:42 PM EDT	Special Weather Statement	CAE	McCormick	63 min
May 29, 4:51 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	54 min
May 29, 5:11 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	64 min
May 29, 5:53 PM EDT	Special Weather Statement	CAE	Lexington	52 min
May 29, 6:12 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick, Saluda	63 min
May 29, 6:15 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, Lexington, Newberry, Saluda	60 min
May 29, 6:31 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	59 min
May 29, 6:55 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Calhoun, Lexington, Richland	65 min
May 29, 7:11 PM EDT	Severe Thunderstorm Warning	CAE	Lexington, Richland, Saluda	64 min
May 29, 7:32 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Richland, Sumter	28 min
May 29, 7:48 PM EDT	Flash Flood Warning	CAE	Lexington, Richland	57 min
May 29, 7:52 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Richland, Sumter	53 min
May 29, 6:49 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, McDuffie	41 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017 Severe Thunderstorm Warnings in Georgia, 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.