Alert archive / South Carolina / Heat Advisories in 2015

Heat Advisory 7, NWS Charleston, SC

June 21, 2015Berkeley County, Colleton County, Dorchester County, South Carolina

NWS Charleston, SC issued this heat advisory at Jun 21, 2015, 2:43 AM EDT for Berkeley County, Colleton County, Dorchester County, South Carolina. It took effect at Jun 21, 2015, 12:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jun 21, 2015, 2:43 AM EDT (06:43 UTC)
In effect from: Jun 21, 2015, 12:00 PM EDT
Expired: Jun 21, 2015, 7:00 PM EDT
In force: 7 hr
Issued by: NWS Charleston, SC

Counties Berkeley County, SC, Colleton County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 79 km from the middle of the area, began a volume at 06:43 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 6.7 hours before the alert went out and 340 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1759 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat 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 heat advisory went out at Jun 21, 12:47 AM EDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jun 21, 12:47 AM EDT, 1 hour 56 minutes before

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Hazardous weather outlook, Jun 20, 6:37 PM EDT, 8 hours 6 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
Jun 21, 3:16 PM EDT	Heat Advisory	CHS	Allendale, Berkeley, Colleton, Dorchester, Hampton	27 hr

Nearby

Heat Advisories in South Carolina, 2015 Heat Advisories in Georgia, 2015 Every heat advisory 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.