Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Columbia, SC

December 20, 20126 counties in South Carolina

NWS Columbia, SC issued this special weather statement at Dec 20, 2012, 6:37 PM EST for 6 counties in South Carolina. It was in force for 83 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: Dec 20, 2012, 6:37 PM EST (23:37 UTC)
Expired: Dec 20, 2012, 8:00 PM EST
In force: 83 min
Issued by: NWS Columbia, SC

Counties Edgefield County, SC, Fairfield County, SC, Lancaster County, SC, Lexington County, SC, Newberry County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 63 km from the middle of the area, began a volume at 23:39 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, 11.6 hours before the alert went out and 323 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2398 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 408 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Dec 20, 5:36 PM EST, 1 hour 1 minute earlier.

Area forecast discussion, Dec 20, 5:36 PM EST, 1 hour 1 minute before

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Hazardous weather outlook, Dec 20, 4:28 PM EST, 2 hours 9 minutes before

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In the hours before

Special weather statement, Dec 20, 6:37 PM EST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
637 PM EST THU DEC 20 2012

SCZ015-016-018-020>022-025>028-030-210100-
AIKEN-CHESTERFIELD-EDGEFIELD-FAIRFIELD-KERSHAW-LANCASTER-LEXINGTON-
MCCORMICK-NEWBERRY-RICHLAND-SALUDA-
637 PM EST THU DEC 20 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF CHESTERFIELD...
EDGEFIELD...FAIRFIELD...KERSHAW...LANCASTER...LEXINGTON...
MCCORMICK...NEWBERRY...RICHLAND...SALUDA AND AIKEN COUNTIES THROUGH
800 PM EST...

AT 630 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG RAIN SHOWERS...ALONG A LINE EXTENDING FROM 27 MILES NORTHWEST
OF IRWIN TO 9 MILES NORTHEAST OF PARKSVILLE...MOVING EAST AT 25 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BATESBURG...EDGEFIELD...IRMO...IRWIN...JOHNSTON...
LANCASTER...LEESVILLE...LEXINGTON...NEWBERRY...
RED BANK...RIDGE SPRING...SALUDA...WHITMIRE AND WINNSBORO...

GUSTY WINDS OF 40 TO 50 MPH MAY ACCOMPANY THIS LINE OF SHOWERS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR USE
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.COLUMBIA.GOV TO RELAY
SEVERE WEATHER REPORTS. &&

LAT...LON 3494 8078 3482 8079 3482 8041 3372 8133
      3379 8224 3398 8208 3396 8202 3413 8188
      3418 8192 3453 8163 3445 8153 3450 8143
      3458 8142 3455 8088 3464 8090 3470 8086
      3483 8091 3492 8087 3504 8090
TIME...MOT...LOC 2333Z 275DEG 21KT 3498 8113 3385 8207

HC

Nearby

Special Weather Statements in South Carolina, 2012 Every special weather statement in 2012

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.