Alert archive / South Carolina / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 68, NWS Wilmington, NC

July 4, 2019Williamsburg County, South Carolina

NWS Wilmington, NC issued this severe thunderstorm warning at Jul 4, 2019, 2:57 PM EDT for Williamsburg 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 counties it named.

The facts

Issued: Jul 4, 2019, 2:57 PM EDT (18:57 UTC)
Expired: Jul 4, 2019, 3:24 PM EDT
In force: 27 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Williamsburg County, SC

The radar

The Wilmington radar (KLTX), 127 km from the middle of the area, began a volume at 19:00 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 12:00Z, 7.0 hours before the alert went out and 84 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: 1703 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 4, 2:13 PM EDT, 44 minutes earlier.

Area forecast discussion, Jul 4, 2:13 PM EDT, 44 minutes before

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Hazardous weather outlook, Jul 4, 11:48 AM EDT, 3 hours 9 minutes before

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In the hours before

Special weather statement, Jul 4, 1:53 PM EDT, 1 hour 4 minutes before

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Local storm report, Jul 4, 2:25 PM EDT, 32 minutes 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
Jul 4, 10:34 AM EDT	Beach Hazards Statement	ILM	New Hanover, Pender	9 hr
Jul 4, 11:30 AM EDT	Heat Advisory	ILM	Brunswick, Columbus	6 hr
Jul 4, 12:15 PM EDT	Coastal Flood Advisory	ILM	Brunswick, New Hanover, Pender	14 hr
Jul 4, 4:00 PM EDT	Special Weather Statement	ILM	Pender	60 min
Jul 4, 4:08 PM EDT	Special Weather Statement	ILM	Robeson	67 min
Jul 4, 4:19 PM EDT	Severe Thunderstorm Warning	ILM	Bladen, Robeson	26 min
Jul 4, 5:01 PM EDT	Special Weather Statement	ILM	Bladen, Robeson	59 min
Jul 4, 7:48 PM EDT	Special Marine Warning	ILM		31 min
Jul 4, 1:53 PM EDT	Special Weather Statement	ILM	Williamsburg	67 min
Jul 4, 2:25 PM EDT	Severe Thunderstorm Warning	ILM	Florence, Georgetown, Williamsburg	35 min
Jul 4, 4:06 PM EDT	Special Weather Statement	ILM	Darlington	54 min
Jul 4, 4:35 PM EDT	Areal Flood Advisory	ILM	Darlington, Florence, Marlboro	2 hr

Nearby

Severe Thunderstorm Warnings in South Carolina, 2019 Every severe thunderstorm warning in 2019

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.