Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 69, NWS Columbia, SC

May 24, 2017Columbia County, Lincoln County, McDuffie County, Georgia; Edgefield County, McCormick County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 24, 2017, 1:21 PM EDT for Columbia County, Lincoln County, McDuffie County, Georgia; Edgefield County, McCormick County, South Carolina. It was in force for 39 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: May 24, 2017, 1:21 PM EDT (17:21 UTC)
Expired: May 24, 2017, 2:00 PM EDT
In force: 39 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

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

The radar

The Columbia radar (KCAE), 132 km from the middle of the area, began a volume at 17:22 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
May 24, 10:04 AM EDT	Tornado Watch	SPC	11 hr
May 24, 11:03 AM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 5.4 hours before the alert went out and 188 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: 145 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 674 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

887 
WUUS52 KCAE 241721
SVRCAE
GAC073-181-189-SCC037-065-241800-
/O.NEW.KCAE.SV.W.0069.170524T1721Z-170524T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
121 PM EDT WED MAY 24 2017

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Columbia County in east central Georgia...
  Northwestern McDuffie County in east central Georgia...
  Southeastern Lincoln County in east central Georgia...
  Southwestern Edgefield County in central South Carolina...
  Southeastern McCormick County in central South Carolina...

* Until 200 PM EDT

* At 120 PM EDT, a severe thunderstorm was located 8 miles northwest
  of Thomson, moving northeast at 40 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Parksville, Clarks Hill and Modoc. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

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

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.

&&

A tornado watch remains in effect until 600 PM EDT for east central
Georgia...and central South Carolina. A tornado watch also remains in
effect until 600 PM EDT for east central Georgia...and central South
Carolina.

LAT...LON 3364 8261 3363 8261 3364 8259 3363 8258
      3364 8257 3364 8252 3366 8251 3365 8249
      3370 8252 3387 8215 3363 8197 3348 8259
      3359 8264
TIME...MOT...LOC 1720Z 242DEG 36KT 3358 8256 

HAIL...0.88IN
WIND...60MPH
 
$$

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 1:57 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Lincoln, McDuffie	48 min
May 24, 2:57 PM EDT	Areal Flood Advisory	CAE	Columbia, McDuffie	2 hr
May 24, 4:15 PM EDT	Severe Thunderstorm Warning	CAE	Burke	45 min
May 24, 2:28 AM EDT	Special Weather Statement	CAE	Bamberg	47 min
May 24, 2:30 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, Lexington, Newberry, Saluda	45 min
May 24, 2:33 PM EDT	Tornado Warning	CAE	Edgefield, Saluda	27 min
May 24, 3:00 PM EDT	Tornado Warning	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	30 min
May 24, 3:14 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	61 min
May 24, 3:28 PM EDT	Tornado Warning	CAE	Fairfield, Newberry	32 min
May 24, 3:48 PM EDT	Severe Thunderstorm Warning	CAE	Lancaster	42 min
May 24, 3:54 PM EDT	Tornado Warning	CAE	Lancaster	36 min
May 24, 4:12 PM EDT	Areal Flood Advisory	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	2 hr
May 24, 4:48 PM EDT	Special Weather Statement	CAE	Aiken	27 min
May 24, 5:40 PM EDT	River Flood Advisory	CAE	Lexington, Richland	48 hr
May 24, 6:46 PM EDT	River Flood Warning	CAE	Calhoun, Lexington, Richland	3 days

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.