Alert archive / Georgia / Freeze Watches in 2020

Freeze Watch 3, NWS Atlanta, GA

November 17, 202023 counties in Georgia

NWS Atlanta, GA issued this freeze watch at Nov 17, 2020, 4:09 AM EST for 23 counties in Georgia. It took effect at Nov 18, 2020, 12:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Nov 17, 2020, 4:09 AM EST (09:09 UTC)
In effect from: Nov 18, 2020, 12:00 AM EST
Expired: Nov 17, 2020, 12:15 PM EST
In force
Issued by: NWS Atlanta, GA

All 23 counties

Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Haralson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Walker County, GA, White County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 114 km from the middle of the area, began a volume at 09:10 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

Birmingham, AL (KBMX), launched 00:00Z, 9.2 hours before the alert went out and 230 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: 2872 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -81 m²/s²
0-3 km storm-relative helicity: -105 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 Nov 17, 4:09 AM EST, 0 minutes earlier.

Area forecast discussion, Nov 17, 4:09 AM EST, 0 minutes before

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Hazardous weather outlook, Nov 16, 7:30 PM EST, 8 hours 39 minutes before

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In the hours before

Special weather statement, Nov 17, 4:09 AM EST, 0 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
Nov 17, 12:15 PM EST	Frost Advisory	FFC	Baldwin, Banks, Bibb, Clarke, Crawford, Glascock and 21 more	20 hr
Nov 17, 12:15 PM EST	Freeze Warning	FFC	Barrow, Bartow, Butts, Carroll, Catoosa, Chattooga and 40 more	20 hr

Nearby

Freeze Watches in Georgia, 2020 Every freeze watch in 2020

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.