Alert archive / Georgia / Freeze Watches in 2018

Freeze Watch 8, NWS Atlanta, GA

April 16, 20184 counties in Georgia

NWS Atlanta, GA issued this freeze watch at Apr 16, 2018, 3:30 AM EDT for 4 counties in Georgia. It took effect at Apr 17, 2018, 2:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 16, 2018, 3:30 AM EDT (07:30 UTC)
In effect from: Apr 17, 2018, 2:00 AM EDT
Expired: Apr 16, 2018, 1:59 PM EDT
In force
Issued by: NWS Atlanta, GA

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

The radar

The Knoxville radar (KMRX), 163 km from the middle of the area, began a volume at 07:28 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, 7.5 hours before the alert went out and 166 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: 1077 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 73 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 watch 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 freeze watch went out at Apr 15, 7:53 PM EDT, 7 hours 37 minutes earlier.

Area forecast discussion, Apr 15, 7:53 PM EDT, 7 hours 37 minutes before

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Hazardous weather outlook, Apr 15, 5:23 PM EDT, 10 hours 7 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
Apr 15, 9:47 PM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	24 hr
Apr 16, 1:59 PM EDT	Freeze Warning	FFC	Dawson, Fannin, Gilmer, Lumpkin, Murray, Pickens and 3 more	19 hr

Nearby

Freeze Watches in Georgia, 2018 Every freeze watch 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.