Alert archive / South Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Columbia, SC

September 1, 2017Edgefield County, South Carolina

NWS Columbia, SC issued this special weather statement at Sep 1, 2017, 8:03 PM EDT for Edgefield County, South Carolina. It was in force for 27 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
Sep 1, 2017, 8:03 PM EDT (00:03 UTC)
Expired
Sep 1, 2017, 8:30 PM EDT
In force
27 min
Issued by
NWS Columbia, SC

County Edgefield County, SC

The radar

The Columbia radar (KCAE), 85 km from the middle of the area, began a volume at 00:03 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, 0.1 hours before the alert went out and 211 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-pSkew-T log-p diagram, Charleston AFB, SC at 00:00Z on 2017-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2017-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
54 J/kg
Mixed-layer CIN
-293 J/kg
Mixed-layer LCL
1753 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
66 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 Sep 1, 7:46 PM EDT, 17 minutes earlier.

Area forecast discussion, Sep 1, 7:46 PM EDT, 17 minutes before
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Hazardous weather outlook, Sep 1, 2:57 AM EDT, 17 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Columbia SC
257 AM EDT Fri Sep 1 2017

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-020700-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
257 AM EDT Fri Sep 1 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.

Showers and strong thunderstorms are forecast to develop once again
today into this evening as the remnants of Harvey move north of the
area. Severe storms with strong winds, isolated tornadoes, and heavy
rainfall will be possible.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

In the hours before

Local storm report, Sep 1, 3:47 PM EDT, 4 hours 16 minutes before
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Local storm report, Sep 1, 4:05 PM EDT, 3 hours 58 minutes before
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Local storm report, Sep 1, 4:10 PM EDT, 3 hours 53 minutes before
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Local storm report, Sep 1, 4:12 PM EDT, 3 hours 51 minutes before
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Local storm report, Sep 1, 4:19 PM EDT, 3 hours 44 minutes before
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Local storm report, Sep 1, 4:29 PM EDT, 3 hours 34 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 5:13 AM EDTDense Fog AdvisoryCAEChesterfield, Fairfield, Kershaw4 hr

Nearby

Special Weather Statements in South Carolina, 2017Every 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.