Alert archive / South Carolina / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 86, NWS Wilmington, NC

September 10, 20154 counties in South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Sep 10, 2015, 8:38 PM EDT for 4 counties in South Carolina. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 10, 2015, 8:38 PM EDT (00:38 UTC)
Expired: Sep 10, 2015, 9:24 PM EDT
In force: 46 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon

Counties Florence County, SC, Georgetown County, SC, Marion County, SC, Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 104 km from the middle of the area, began a volume at 00:38 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, 0.6 hours before the alert went out and 108 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: 1835 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.8

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Wilmington, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 10, 7:45 PM EDT, 53 minutes earlier.

Area forecast discussion, Sep 10, 7:45 PM EDT, 53 minutes before

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Hazardous weather outlook, Sep 10, 7:54 PM EDT, 44 minutes before

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In the hours before

Special weather statement, Sep 10, 8:09 PM EDT, 29 minutes before

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Special weather statement, Sep 10, 8:19 PM EDT, 19 minutes before

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Local storm report, Sep 10, 8:37 PM EDT, 1 minute before

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The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 10, 8:59 PM EDT	Special Marine Warning	ILM		2 hr
Sep 10, 8:59 PM EDT	Special Weather Statement	ILM	Robeson	46 min
Sep 10, 9:23 PM EDT	Special Marine Warning	ILM		97 min
Sep 10, 10:06 PM EDT	Special Weather Statement	ILM	Robeson	54 min
Sep 11, 4:06 PM EDT	Areal Flood Advisory	ILM	New Hanover	54 min
Sep 10, 8:09 PM EDT	Special Weather Statement	ILM	Florence, Williamsburg	66 min
Sep 10, 8:19 PM EDT	Special Weather Statement	ILM	Florence, Williamsburg	56 min
Sep 10, 8:45 PM EDT	Special Weather Statement	ILM	Darlington	60 min
Sep 10, 8:48 PM EDT	Severe Thunderstorm Warning	ILM	Georgetown, Williamsburg	57 min
Sep 10, 9:10 PM EDT	Special Weather Statement	ILM	Horry	50 min
Sep 10, 9:29 PM EDT	Special Weather Statement	ILM	Darlington, Dillon, Marlboro	61 min
Sep 10, 9:32 PM EDT	Special Weather Statement	ILM	Horry	43 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2015 Every severe thunderstorm warning in 2015

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.