Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

May 1, 2017McCormick County, South Carolina; Lincoln County, McDuffie County, Georgia

NWS Columbia, SC issued this special weather statement at May 1, 2017, 2:21 PM EDT for McCormick County, South Carolina; Lincoln County, McDuffie County, Georgia. It was in force for 24 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 1, 2017, 2:21 PM EDT (18:21 UTC)
Expired: May 1, 2017, 2:45 PM EDT
In force: 24 min
Issued by: NWS Columbia, SC

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

The radar

The Columbia radar (KCAE), 130 km from the middle of the area, began a volume at 18:22 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 nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.4 hours before the alert went out and 189 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: 118 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 300 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted.

481 
WWUS82 KCAE 011821
SPSCAE

Special Weather Statement
National Weather Service Columbia SC
221 PM EDT MON MAY 1 2017

GAZ040-063-064-SCZ018-011845-
McDuffie-Lincoln-Columbia-McCormick-
221 PM EDT MON MAY 1 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN
COLUMBIA...MCDUFFIE...LINCOLN AND NORTHWESTERN MCCORMICK COUNTIES...

At 219 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Washington to 7 miles north of
Deepstep. Movement was northeast at 40 mph.

Winds around 40 mph are possible with these storms.

Locations impacted include...
Thomson, McCormick, Lincolnton, Lake Strom Thurmond, Willington and
Mount Carmel.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3364 8261 3363 8258 3365 8258 3364 8256
      3365 8249 3383 8260 3386 8257 3386 8261
      3393 8263 3396 8257 3406 8244 3406 8233
      3397 8230 3402 8225 3399 8222 3333 8243
      3334 8250 3336 8255 3341 8255 3360 8265
TIME...MOT...LOC 1819Z 236DEG 35KT 3380 8276 3312 8298 

$$

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 2:45 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	45 min
May 1, 3:25 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	50 min
May 1, 3:55 PM EDT	Special Weather Statement	CAE	Newberry	50 min
May 1, 5:24 PM EDT	Special Weather Statement	CAE	Fairfield, Lancaster	51 min
May 1, 6:41 PM EDT	Special Weather Statement	CAE	Kershaw	34 min
May 1, 7:03 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Calhoun, Orangeburg	42 min
May 1, 7:58 PM EDT	Special Weather Statement	CAE	Clarendon, Sumter	62 min

Nearby

Special Weather Statements in Georgia, 2017 Special Weather Statements in South Carolina, 2017 Every special weather statement 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.