Mountain Area Forecast ( Dec 5-8 )
A period of accumulating snow will be possible late Saturday into Sunday AM ( December 9-10 ), especially in locations along & north-northwest of the High Knob Massif and Tennessee Valley Divide, with a new surge of bitterly cold air.
Overnight Into Tuesday Morning
Becoming cloudy. Windy, especially along mid-upper elevation mountain ridges. Large vertical temp spread through early overnight between sheltered valleys and exposed ridges. SSE-SSW winds 10-20 mph, with higher gusts, below 2700 feet. S to SW winds 15-30 mph, with gusts over 40 mph, on mid-upper elevation ridges. Temps varying from 30s in colder valleys to the mid 40s to mid 50s along mountain ridges & exposed plateaus. Wind chills in the 30s along upper elevation mountain ridges.
Tuesday Morning Through The Afternoon
Cloudy & windy with rain developing. Local downpours. Winds SSW-WSW at 10-25 mph, with higher gusts. Turning cooler by late. Temperatures varying from low-mid 40s to the low-mid 50s. Low cloud bases with dense fog at upper elevations. Wind chills in the 30s along upper elevation mountain ridges.
Tuesday Night Into Wednesday Morning
Partly-mostly cloudy. A chance of flurries. Turning colder. Winds WNW to NW at 5-15 mph, with higher gusts. Temps from low-mid 20s to lower 30s. Wind chills in the 10s and 20s, except single digits in gusts at highest elevations.
High clouds. Cold. Winds SW-W at 5-10 mph, with some higher gusts. Temperatures varying from upper 20s to lower 30s in upper elevations to upper 30s and lower 40s. Wind chills in the 20s to lower 30s on mountain ridges, except 10s in stronger gusts at highest elevations.
Wednesday Night Into Thursday Morning
Mostly cloudy ( high clouds ) and cold. Winds WSW-WNW at 5-15 mph, with higher gusts. Temperatures widespread in the 20s to around 30 degrees. Wind chills in the 10s & 20s, coldest at highest elevations.
Partly to mostly cloudy. Cold. Winds WSW-WNW at 5-10 mph, with some higher gusts. Temperatures varying from upper 20s to lower 30s in upper elevations to the upper 30s to lower 40s.
Thursday Night Into Friday Morning
Mostly cloudy. A chance of flurries. Cold. Winds WNW-NNW at 10 mph or less. Temperatures varying from the lower-middle 10s to the low-middle 20s.
A very cold pattern is taking shape for the eastern USA, with this initial push of cold air being only seasonably cold. Increasingly cold air, with potential for extreme cold, is being monitored for this weekend into the next 1-2 weeks in separated surges.
Weather Discussion ( Harsh Potential )
Late Tuesday Evening Update
Only a few changes to this update, including the addition of a word of caution for everyone to be watchful of icy patches on any above ground or outdoor surfaces that remain wet as temperatures continue to drop overnight.
As of Midnight temps had fallen into the middle 20s at highest elevations, in clouds, with wind chills dropping to around or below 10 degrees in gusts ( temps at the summit of High Knob tend to run a couple degrees colder than this live data from the Black Mountain mesonet ).
Rainfall with Tuesday’s cold frontal boundary averaged 0.75″ to 1.25″ over the High Knob Massif, and along higher portions of the Tennessee Valley Divide, with lesser amounts elsewhere.
The main change to Wednesday is to increase cloudiness, as it looks like it may be difficult to shake the high clouds as tonight’s frontal system stalls far to the south. This will make it a chore for many places to get out of the 30s in upslope locations along and west to southwest of the Tennessee Valley Divide and High Knob Massif.