Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 87, NWS Columbia, SC

May 29, 20174 counties in South Carolina; Columbia County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at May 29, 2017, 6:12 PM EDT for 4 counties in South Carolina; Columbia County, Georgia. It was in force for 63 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: May 29, 2017, 6:12 PM EDT (22:12 UTC)
Expired: May 29, 2017, 7:15 PM EDT
In force: 63 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 1.25 in
Wind: 70.0 mph

Counties Columbia County, GA, Aiken County, SC, Edgefield County, SC, McCormick County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 98 km from the middle of the area, began a volume at 22:14 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, 6:14 PM EDT	HAIL 1	2 W Clarks Hill, SC	REPORTED QUARTER SIZE HAIL AT THE LAKE THURMOND VISITORS CENTER.
May 29, 6:37 PM EDT	HAIL 2.75	Johnston, SC	BASEBALL SIZE HAIL REPORT ON LEE STREET. RECEIVED VIA SOCIAL MEDIA.

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

Charleston AFB, SC (KCHS), launched 12:00Z, 10.2 hours before the alert went out and 217 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: 156 J/kg
Mixed-layer CIN: -337 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

139 
WUUS52 KCAE 292212
SVRCAE
GAC073-SCC003-037-065-081-292315-
/O.NEW.KCAE.SV.W.0087.170529T2212Z-170529T2315Z/

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

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northeastern Columbia County in east central Georgia...
  Central Edgefield County in central South Carolina...
  Northwestern Aiken County in central South Carolina...
  South central Saluda County in central South Carolina...
  Southeastern McCormick County in central South Carolina...

* Until 715 PM EDT

* At 612 PM EDT, a severe thunderstorm was located 9 miles north of
  Evans, moving east at 45 mph.

  HAZARD...70 mph wind gusts and half dollar 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, Johnston, Ridge Spring, Monetta, Trenton, Ward, Murphys
  Estates, Clarks Hill and Modoc.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3369 8228 3368 8228 3369 8224 3369 8222
      3370 8224 3371 8223 3391 8161 3361 8149
      3357 8231 3368 8232
TIME...MOT...LOC 2212Z 263DEG 39KT 3364 8220 

HAIL...1.25IN
WIND...70MPH
 
$$

awp

1 follow-up statement

047 
WWUS52 KCAE 292245
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
645 PM EDT MON MAY 29 2017

GAC073-SCC065-292254-
/O.CAN.KCAE.SV.W.0087.000000T0000Z-170529T2315Z/
Columbia GA-McCormick SC-
645 PM EDT MON MAY 29 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COLUMBIA AND
SOUTHEASTERN MCCORMICK COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM EDT for
central South Carolina.

LAT...LON 3369 8198 3369 8195 3377 8206 3391 8161
      3361 8149 3364 8185 3366 8192
TIME...MOT...LOC 2244Z 251DEG 36KT 3373 8183 

$$

SCC003-037-081-292315-
/O.CON.KCAE.SV.W.0087.000000T0000Z-170529T2315Z/
Edgefield SC-Aiken SC-Saluda SC-
645 PM EDT MON MAY 29 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR CENTRAL EDGEFIELD...NORTHWESTERN AIKEN AND SOUTH CENTRAL SALUDA
COUNTIES...

At 644 PM EDT, a severe thunderstorm was located 7 miles southeast of
Edgefield, or 14 miles northwest of Aiken, moving east at 40 mph.

HAZARD...70 mph wind gusts and half dollar 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, Johnston, Ridge Spring, Monetta, Trenton and Ward. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3369 8198 3369 8195 3377 8206 3391 8161
      3361 8149 3364 8185 3366 8192
TIME...MOT...LOC 2244Z 251DEG 36KT 3373 8183 

HAIL...1.25IN
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, 5:35 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	55 min
May 29, 5:53 PM EDT	Special Weather Statement	CAE	Lexington	52 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.