Alert archive / South Carolina / Special Weather Statements in 2016

Special Weather Statement, NWS Columbia, SC

July 21, 2016Aiken County, South Carolina

NWS Columbia, SC issued this special weather statement at Jul 21, 2016, 7:43 AM EDT for Aiken County, South Carolina. It was in force for 62 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: Jul 21, 2016, 7:43 AM EDT (11:43 UTC)
Expired: Jul 21, 2016, 8:45 AM EDT
In force: 62 min
Issued by: NWS Columbia, SC

County Aiken County, SC

The radar

The Columbia radar (KCAE), 52 km from the middle of the area, began a volume at 11:43 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

Charleston AFB, SC (KCHS), launched 00:00Z, 11.7 hours before the alert went out and 174 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: 1782 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Jul 21, 6:46 AM EDT, 57 minutes earlier.

Area forecast discussion, Jul 21, 6:46 AM EDT, 57 minutes before

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Hazardous weather outlook, Jul 21, 4:37 AM EDT, 3 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
437 AM EDT THU JUL 21 2016

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-220845-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
437 AM EDT THU JUL 21 2016

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 THUNDERSTORMS THIS AFTERNOON MAY PRODUCE DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

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, Jul 21, 6:36 AM EDT, 1 hour 7 minutes before

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Special weather statement, Jul 21, 7:43 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
743 AM EDT THU JUL 21 2016

SCZ030-211245-
AIKEN-
743 AM EDT THU JUL 21 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL AIKEN COUNTY...

AT 742 AM EDT...A STRONG THUNDERSTORM WAS 7 MILES SOUTH OF RIDGE
SPRING...OR 12 MILES SOUTHWEST OF BATESBURG...MOVING SOUTH AT 10 MPH.

WIND GUSTS OF 30 TO 40 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
AIKEN.

TORRENTIAL RAINFALL IS ALSO POSSIBLE WITH THIS STORM. FREQUENT CLOUD
TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN
STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE
A BUILDING OR VEHICLE.

LAT...LON 3378 8169 3380 8164 3377 8150 3360 8138
      3354 8174
TIME...MOT...LOC 1142Z 347DEG 9KT 3374 8164

HC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 9:54 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, McCormick	33 min
Jul 21, 1:34 AM EDT	Special Weather Statement	CAE	Newberry	56 min
Jul 21, 6:36 AM EDT	Special Weather Statement	CAE	Saluda	54 min
Jul 21, 1:09 PM EDT	Special Weather Statement	CAE	Calhoun	51 min
Jul 21, 1:26 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Richland, Sumter	64 min
Jul 21, 1:52 PM EDT	Areal Flood Advisory	CAE	Sumter	113 min
Jul 21, 2:02 PM EDT	Special Weather Statement	CAE	Richland	58 min
Jul 21, 2:17 PM EDT	Special Weather Statement	CAE	McCormick	43 min
Jul 21, 3:35 PM EDT	Special Weather Statement	CAE	Richland	55 min
Jul 21, 3:40 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Richland	26 min
Jul 21, 4:35 PM EDT	Special Weather Statement	CAE	Clarendon	55 min
Jul 21, 4:43 PM EDT	Severe Thunderstorm Warning	CAE	Clarendon, Orangeburg	20 min
Jul 21, 4:54 PM EDT	Severe Thunderstorm Warning	CAE	Orangeburg	35 min
Jul 21, 5:39 PM EDT	Special Weather Statement	CAE	Edgefield	66 min

Nearby

Special Weather Statements in South Carolina, 2016 Every special weather statement in 2016

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.