The 14th Annual High Knob Naturalist Rally will continue virtually through this week and next.

First Major Autumn Cold Front

The first major cold front of the autumn season to transport polar air southward will begin impacting the mountain area Monday Night into Tuesday. A marginal risk of severe storms will be possible along and just ahead of the cold front.

While localized showers and areas of drizzle will be possible Monday, the main shield of rain-embedded thunderstorms will spread across the mountains Monday night. Downpours and a sharp drop in temperature are expected overnight as winds shift northerly into Tuesday morning.

Be alert for water level rises and ponding of water within poor drainage, low-lying locations overnight into Tuesday morning

Cloud bases are expected to lower on upsloping winds that will shift northerly behind the cold front, with lifting of moist air up across middle-upper elevations along and southeast of the Virginia-Kentucky stateline (especially in locations along and N-NW of the High Knob Massif-TN Valley Divide).

ALERT For Dense Fog Development Tuesday At Middle & Upper Elevations Along-North Of The High Knob Massif-Tennessee Valley Divide On Upsloping Northerly Winds

Recall my elevation breakdown for forecasting is:

Below 2000 Feet = Lower Elevations
2000-3000 Feet = Middle Elevations
Above 3000 Feet = Upper Elevations

Expect temperatures mainly in the 40s to around 50 degrees at mid-upper elevations Tuesday in locations along and north of the High Knob Massif-Tennessee Valley Divide (with colder wind chills at higher elevations)