Alert archive / Georgia / Winter Weather Advisories in 2017

Winter Weather Advisory 3, NWS Atlanta, GA

March 13, 20176 counties in Georgia

NWS Atlanta, GA issued this winter weather advisory at Mar 13, 2017, 2:57 PM EDT for 6 counties in Georgia. It took effect at Mar 13, 2017, 8:00 PM EDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Mar 13, 2017, 2:57 PM EDT (18:57 UTC)
In effect from: Mar 13, 2017, 8:00 PM EDT
Expired: Mar 14, 2017, 9:56 AM EDT
In force: 14 hr
Issued by: NWS Atlanta, GA

Counties Fannin County, GA, Gilmer County, GA, Lumpkin County, GA, Towns County, GA, Union County, GA, White County, GA

The radar

The Atlanta radar (KFFC), 162 km from the middle of the area, began a volume at 18:59 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.0 hours before the alert went out and 278 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: 1179 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 189 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 winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this winter weather advisory went out at Mar 12, 7:55 PM EDT, 19 hours 2 minutes earlier.

Area forecast discussion, Mar 12, 7:55 PM EDT, 19 hours 2 minutes before

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The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 13, 2:39 PM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	29 hr

Nearby

Winter Weather Advisories in Georgia, 2017 Every winter weather advisory in 2017

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.