Alert archive / South Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

March 1, 20178 counties in South Carolina; Burke County, Richmond County, Georgia

NWS Columbia, SC issued this special weather statement at Mar 1, 2017, 10:39 PM EST for 8 counties in South Carolina; Burke County, Richmond County, Georgia. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 1, 2017, 10:39 PM EST (03:39 UTC)
Expired: Mar 2, 2017, 12:45 AM EST
In force: 2 hr
Issued by: NWS Columbia, SC

Counties Burke County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Clarendon County, SC, Lee County, SC, Orangeburg County, SC, Sumter County, SC

The radar

The Charleston,SC radar (KCLX), 72 km from the middle of the area, began a volume at 03:40 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 00:00Z, 3.7 hours before the alert went out and 292 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: 432 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1410 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.5

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 Mar 1, 10:07 PM EST, 32 minutes earlier.

Area forecast discussion, Mar 1, 10:07 PM EST, 32 minutes before

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Hazardous weather outlook, Mar 1, 3:19 AM EST, 19 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
319 AM EST Wed Mar 1 2017

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-020830-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
319 AM EST Wed Mar 1 2017

...LAKE WIND ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 3 AM EST
THURSDAY...

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

.DAY ONE...Today and Tonight.

Thunderstorms tonight could possibly contain damaging wind. The
threat will be mainly 900 pm to 200 am. Hail may also occur.

Please listen to NOAA Weather Radio or go to weather.gov on the
internet for more information about the following hazard.

   Lake Wind Advisory.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A freeze warning may be needed for Friday night and Saturday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required tonight.

In the hours before

Local storm report, Mar 1, 8:50 PM EST, 1 hour 49 minutes before

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Local storm report, Mar 1, 8:52 PM EST, 1 hour 47 minutes before

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Special weather statement, Mar 1, 8:52 PM EST, 1 hour 47 minutes before

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Special weather statement, Mar 1, 8:54 PM EST, 1 hour 45 minutes before

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Special weather statement, Mar 1, 9:14 PM EST, 1 hour 25 minutes before

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Special weather statement, Mar 1, 10:39 PM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 1, 7:11 PM EST	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	79 min
Mar 1, 8:15 PM EST	Severe Thunderstorm Warning	CAE	Kershaw, Lancaster	45 min
Mar 1, 8:52 PM EST	Special Weather Statement	CAE	Fairfield, Newberry	38 min
Mar 1, 8:54 PM EST	Special Weather Statement	CAE	Chesterfield	51 min
Mar 1, 9:14 PM EST	Special Weather Statement	CAE	Edgefield, Lexington, McCormick, Richland, Saluda	91 min

Nearby

Special Weather Statements in South Carolina, 2017 Special Weather Statements in Georgia, 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.