Mountain Area Forecast ( Oct 12-14 )
The Potential For The First Widespread Frost-Freeze Of The Season Is Being Monitored For Next Week With An Autumn Air Mass Pushing Into The Appalachians
Although numerous frosty mornings have already been observed in mountain valleys, with local sub-freezing temperatures as well, no widespread frost-freeze has yet been experienced. River valleys that fog up, and a few favored mid-elevation thermal belts, might still be able to remain above freezing. This may be progressive and not long-lived, with above average temperatures returning by late next week into the following week by day. Nights look to continue to be cold, especially in valleys, with large diurnal temp ranges.
Reference My History Of Autumn Color 2017 for an update on color changes & recorded temperatures in the High Knob high country.
Overnight Into Thursday Morning
Areas of dense fog developing in lower-middle elevations. Becoming mostly clear in the upper elevations. Light winds, except W-NW at 5-10 mph, with some higher gusts, on upper elevation mountain ridges. Temperatures varying from 30s to mid 40s in colder valleys at upper elevations in the high country of the High Knob Massif to the lower-middle 50s.
*NOTE – Temperatures Thursday will be cooler than currently in my forecast if a low-level cloud deck develops and does not mix out as currently expected. That remains a small possibility to be noted, especially in locations along & west-northwest of the Tennessee Valley Divide and High Knob Massif.
Partly to mostly sunny. Deep blue skies above any clouds. Generally light winds. Temperatures varying from low-mid 60s in upper elevations to the low-mid 70s ( warmer in river valleys, especially southward into eastern Tennessee ).
Thursday Night Into Friday Morning
Partly to mostly clear. Areas of dense valley fog. Light valley winds. Winds SE-S at 5-15 mph, with higher gusts, along middle-upper elevation mountain ridges. Large temp spread between cooler valleys and milder mountain ridges, varying from 40s to lower 50s in cooler valleys to the lower-middle 60s on exposed ridges-plateaus.
Partly cloudy. Winds SSE-SSW at 5-10 mph with some higher gusts. Temperatures varying from 60s in upper elevations to the mid-upper 70s.
Friday Night Into Saturday Morning
Partly to mostly clear. Areas of dense valley fog. Light valley winds. Winds S-SW at 5-10 mph, with some higher gusts, along mid-upper elevation mountain ridges. Large vertical temperature spread between cooler valleys and exposed ridges-plateaus. Temperatures varying from the 40s in colder mountain valleys to the upper 50s to low 60s.