Alert archive / Georgia / Freeze Warnings in 2018

Freeze Warning 7, NWS Charleston, SC

November 27, 20185 counties in South Carolina; 8 counties in Georgia

NWS Charleston, SC issued this freeze warning at Nov 27, 2018, 3:21 AM EST for 5 counties in South Carolina; 8 counties in Georgia. It took effect at Nov 28, 2018, 2:00 AM EST. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 27, 2018, 3:21 AM EST (08:21 UTC)
In effect from: Nov 28, 2018, 2:00 AM EST
Expired: Nov 28, 2018, 9:00 AM EST
In force: 7 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Jenkins County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 33 km from the middle of the area, began a volume at 08:22 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, 8.4 hours before the alert went out and 134 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: 82 kt
0-1 km storm-relative helicity: -74 m²/s²
0-3 km storm-relative helicity: 126 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 freeze warning 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 freeze warning went out at Nov 27, 12:34 AM EST, 2 hours 47 minutes earlier.

Area forecast discussion, Nov 27, 12:34 AM EST, 2 hours 47 minutes before

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Hazardous weather outlook, Nov 26, 10:37 PM EST, 4 hours 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
Nov 27, 3:26 AM EST	Gale Watch	CHS		11 hr
Nov 27, 5:41 AM EST	Small Craft Advisory	CHS		29 hr
Nov 27, 2:30 PM EST	Gale Warning	CHS		13 hr
Nov 27, 2:30 PM EST	Lake Wind Advisory	CHS	Berkeley	13 hr

Nearby

Freeze Warnings in Georgia, 2018 Freeze Warnings in South Carolina, 2018 Every freeze warning 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.