Alert archive / South Carolina / Lake Wind Advisories in 2018

Lake Wind Advisory 8, NWS Charleston, SC

April 15, 2018Berkeley County, South Carolina

NWS Charleston, SC issued this lake wind advisory at Apr 15, 2018, 6:39 PM EDT for Berkeley County, South Carolina. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Apr 15, 2018, 6:39 PM EDT (22:39 UTC)
Expired: Apr 16, 2018, 6:00 PM EDT
In force: 23 hr
Issued by: NWS Charleston, SC

County Berkeley County, SC

The radar

The Charleston,SC radar (KCLX), 118 km from the middle of the area, began a volume at 22:39 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, 10.7 hours before the alert went out and 33 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: 844 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.5

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Charleston, SC wrote its last area forecast discussion before this lake wind advisory went out at Apr 15, 5:49 PM EDT, 50 minutes earlier.

Area forecast discussion, Apr 15, 5:49 PM EDT, 50 minutes before

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Hazardous weather outlook, Apr 15, 5:46 PM EDT, 53 minutes before

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In the hours before

Local storm report, Apr 15, 4:45 PM EDT, 1 hour 54 minutes before

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Special weather statement, Apr 15, 4:52 PM EDT, 1 hour 47 minutes before

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Local storm report, Apr 15, 5:03 PM EDT, 1 hour 36 minutes before

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Local storm report, Apr 15, 5:17 PM EDT, 1 hour 22 minutes before

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Special weather statement, Apr 15, 5:25 PM EDT, 1 hour 14 minutes before

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Special weather statement, Apr 15, 5:55 PM EDT, 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 3:19 AM EDT	Gale Warning	CHS		28 hr
Apr 15, 3:21 AM EDT	Wind Advisory	CHS	Berkeley, Colleton, Dorchester	15 hr
Apr 15, 1:45 PM EDT	Special Weather Statement	CHS	Allendale	45 min
Apr 15, 2:23 PM EDT	Special Weather Statement	CHS	Beaufort, Colleton, Hampton, Jasper	52 min
Apr 15, 3:23 PM EDT	Special Weather Statement	CHS	Berkeley, Charleston, Colleton, Dorchester	52 min
Apr 15, 3:53 PM EDT	Special Marine Warning	CHS		82 min
Apr 15, 4:32 PM EDT	Special Weather Statement	CHS	Berkeley	28 min
Apr 15, 5:25 PM EDT	Special Weather Statement	CHS	Beaufort, Colleton	35 min
Apr 15, 5:55 PM EDT	Special Weather Statement	CHS	Charleston, Colleton, Dorchester	50 min
Apr 15, 6:35 PM EDT	Special Marine Warning	CHS		40 min
Apr 15, 6:45 PM EDT	Special Weather Statement	CHS	Berkeley, Charleston	45 min
Apr 15, 7:28 PM EDT	Special Weather Statement	CHS	Berkeley	47 min
Apr 15, 12:10 PM EDT	Special Weather Statement	CHS	Candler, Evans, Jenkins, Tattnall	50 min
Apr 15, 12:57 PM EDT	Special Weather Statement	CHS	Bulloch, Candler, Evans, Long, Tattnall	48 min
Apr 15, 12:59 PM EDT	Special Weather Statement	CHS	Jenkins, Screven	46 min
Apr 15, 1:18 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Screven	42 min
Apr 15, 1:32 PM EDT	Special Weather Statement	CHS	Bryan, Effingham, Liberty, McIntosh	43 min
Apr 15, 2:26 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Liberty, Long, McIntosh	49 min
Apr 15, 3:16 PM EDT	Special Weather Statement	CHS	McIntosh	29 min
Apr 15, 3:20 PM EDT	Special Weather Statement	CHS	Effingham	25 min
Apr 15, 3:43 PM EDT	Special Weather Statement	CHS	Chatham, McIntosh	47 min
Apr 15, 4:15 PM EDT	Special Weather Statement	CHS	Chatham	30 min
Apr 15, 4:52 PM EDT	Special Weather Statement	CHS	Chatham	38 min

Nearby

Lake Wind Advisories in South Carolina, 2018 Every lake wind advisory in 2018

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.