Alert archive / North Carolina / Freeze Warnings in 2016

Freeze Warning 1, NWS Greenville-Spartanburg, SC

March 20, 201622 counties in North Carolina; Habersham County, Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this freeze warning at Mar 20, 2016, 3:48 AM EDT for 22 counties in North Carolina; Habersham County, Rabun County, Georgia. It took effect at Mar 21, 2016, 12:00 AM EDT. It was in force for 10 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: Mar 20, 2016, 3:48 AM EDT (07:48 UTC)
In effect from: Mar 21, 2016, 12:00 AM EDT
Expired: Mar 21, 2016, 10:00 AM EDT
In force: 10 hr
Issued by: NWS Greenville-Spartanburg, SC

All 24 counties

Habersham County, GA, Rabun County, GA, Alexander County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 66 km from the middle of the area, began a volume at 07:47 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.8 hours before the alert went out and 317 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: 10 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 990 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 104 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this freeze warning went out at Mar 20, 3:26 AM EDT, 22 minutes earlier.

Area forecast discussion, Mar 20, 3:26 AM EDT, 22 minutes before

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Hazardous weather outlook, Mar 19, 3:30 PM EDT, 12 hours 18 minutes before

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The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 20, 2:12 PM EDT	Winter Weather Advisory	GSP	Graham, Haywood, Jackson, Macon, Swain, Transylvania	20 hr
Mar 20, 2:49 PM EDT	Freeze Watch	GSP	Alexander, Buncombe, Burke, Cabarrus, Caldwell, Catawba and 18 more	24 hr

Nearby

Freeze Warnings in North Carolina, 2016 Freeze Warnings in Georgia, 2016 Freeze Warnings in South Carolina, 2016 Every freeze warning in 2016

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.