Alert archive / South Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

June 30, 2017McCormick County, South Carolina

NWS Columbia, SC issued this special weather statement at Jun 30, 2017, 4:45 PM EDT for McCormick County, South Carolina. It was in force for 45 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: Jun 30, 2017, 4:45 PM EDT (20:45 UTC)
Expired: Jun 30, 2017, 5:30 PM EDT
In force: 45 min
Issued by: NWS Columbia, SC

County McCormick County, SC

The radar

The Columbia radar (KCAE), 95 km from the middle of the area, began a volume at 20:45 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, 8.8 hours before the alert went out and 226 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: 449 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this special weather statement went out at Jun 30, 2:48 PM EDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jun 30, 2:48 PM EDT, 1 hour 57 minutes before

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Hazardous weather outlook, Jun 30, 3:44 AM EDT, 13 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Columbia SC
344 AM EDT Fri Jun 30 2017

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-010745-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
344 AM EDT Fri Jun 30 2017

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...Today and Tonight.

Scattered to numerous thunderstorms are expected today producing
locally heavy rainfall in the stronger storms.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jun 30, 4:45 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Columbia SC
445 PM EDT FRI JUN 30 2017

GAZ040-064-SCZ018-025-026-302130-
Lincoln-Columbia-McCormick-Saluda-Edgefield-
445 PM EDT FRI JUN 30 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN COLUMBIA...
SOUTHEASTERN LINCOLN...NORTHWESTERN EDGEFIELD...WESTERN SALUDA AND
NORTHEASTERN MCCORMICK COUNTIES...

At 444 PM EDT, a strong thunderstorm was located over Lake Thurmond
, or 23 miles south of Abbeville, moving northeast at 30 mph.

Winds around 40 mph are possible with this storm.

Locations impacted include...
McCormick, Parksville, Plum Branch and Modoc.

LAT...LON 3388 8243 3399 8221 3397 8218 3399 8215
      3398 8208 3398 8205 3396 8205 3396 8201
      3401 8198 3384 8191 3368 8236
TIME...MOT...LOC 2044Z 246DEG 27KT 3384 8230

awp

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 11:48 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Saluda	117 min
Jun 30, 5:30 PM EDT	Special Weather Statement	CAE	Aiken	30 min
Jun 30, 5:59 PM EDT	Special Weather Statement	CAE	Aiken	46 min
Jun 30, 6:10 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington	50 min
Jun 30, 6:58 PM EDT	Special Weather Statement	CAE	Lexington, Richland	62 min
Jun 30, 7:14 PM EDT	Special Weather Statement	CAE	Bamberg, Orangeburg	61 min
Jun 30, 5:18 PM EDT	Special Weather Statement	CAE	Richmond	42 min
Jun 30, 5:33 PM EDT	Special Weather Statement	CAE	Burke	27 min

Nearby

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.