Alert archive / Georgia / Freeze Watches in 2018
Freeze Watch 9, NWS Atlanta, GA
NWS Atlanta, GA issued this freeze watch at Apr 18, 2018, 2:39 PM EDT for Fannin County, Towns County, Union County, Georgia. It took effect at Apr 20, 2018, 4:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 18, 2018, 2:39 PM EDT (18:39 UTC)
- In effect from
- Apr 20, 2018, 4:00 AM EDT
- Expired
- Apr 19, 2018, 3:41 AM EDT
- In force
- Issued by
- NWS Atlanta, GA
Counties Fannin County, GA, Towns County, GA, Union County, GA
The radar
The Knoxville radar (KMRX), 155 km from the middle of the area, began a volume at 18:40 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, 6.7 hours before the alert went out and 273 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 318 m²/s²
- 0-3 km storm-relative helicity
- 394 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 18, 1:40 PM EDT, 59 minutes earlier.
Area forecast discussion, Apr 18, 1:40 PM EDT, 59 minutes before
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</html>Hazardous weather outlook, Apr 18, 3:37 AM EDT, 11 hours 2 minutes before
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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.