Alert archive / South Carolina / Frost Advisories in 2011

Frost Advisory 14, NWS Greenville-Spartanburg, SC

October 30, 20118 counties in South Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this frost advisory at Oct 30, 2011, 2:50 PM EDT for 8 counties in South Carolina; 4 counties in Georgia. It took effect at Oct 31, 2011, 5:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Oct 30, 2011, 2:50 PM EDT (18:50 UTC)
In effect from: Oct 31, 2011, 5:00 AM EDT
Expired: Oct 31, 2011, 9:00 AM EDT
In force: 4 hr
Issued by: NWS Greenville-Spartanburg, SC

Counties Elbert County, GA, Franklin County, GA, Hart County, GA, Stephens County, GA, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 41 km from the middle of the area, began a volume at 18:50 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, 6.8 hours before the alert went out and 276 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: 1701 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -207 m²/s²
0-3 km storm-relative helicity: 30 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this frost advisory went out at Oct 29, 7:39 PM EDT, 19 hours 11 minutes earlier.

Area forecast discussion, Oct 29, 7:39 PM EDT, 19 hours 11 minutes before

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Hazardous weather outlook, Oct 29, 7:07 PM EDT, 19 hours 43 minutes before

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Nearby

Frost Advisories in South Carolina, 2011 Frost Advisories in Georgia, 2011 Every frost advisory in 2011

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.