ALERT For Lowering Cloud Bases And Dense Fog Development During Monday Afternoon Into Tuesday In Locations Along And North Of The High Knob Massif & Tennessee Valley Divide (At Elevations Above 2000-2500 feet)
The first strong cold front of the autumn season will lower cloud bases and spread rain across the mountain landscape Monday into Tuesday, with temperatures falling through the 50s Monday afternoon into Tuesday in locations along and north of the High Knob Massif and Tennessee Valley Divide.
Surface Wind Streamline Trajectories
Update_Monday Evening_7 October 2019
Air flowing south across the Ohio River and upward into the Cumberland Overthrust Block is generating low cloud bases and very dense fog, with near zero visibility at times, across large areas of Wise & Dickenson counties. Please slow down and use extreme caution.
Dense fog will develop on northerly upslope flow, with dropping cloud bases into middle elevations (below 3000 feet) by later Monday into Tuesday. Caution is advised.
Mountain Area Forecast (Monday-Tuesday)
Overnight Into Monday Morning
Cloudy. Chance of a shower or drizzle. Gusty SSE-SSW winds 5-15 mph, with higher gusts, at elevations below 2700 feet. Winds S-SE at 10-20 mph, with higher gusts, above 2700 feet. Low clouds with dense fog at highest elevations. Temperatures varying from mid-upper 50s to the lower-middle 60s (coolest highest elevations).
Monday Afternoon
Rain developing. Chance of thunder and local downpours. Turning much cooler. Lowering cloud bases with dense fog development from upper elevations into the middle elevations by late afternoon. Scattered fog in other locations. Winds shifting NNW-N at 5-15 mph with higher gusts. Temperatures dropping into the 50s by mid-late afternoon from Norton-Wise north-northeast, warmer south of the High Knob Massif.
Monday Night Into Tuesday Morning
Periods of light rain and drizzle. Cool. Dense fog at mid-upper elevations. Winds N-NE at 5-15 mph with higher gusts. Temperatures varying from mid-upper 40s to the low-mid 50s, coolest highest elevations, milder toward the south into the Great Valley.
Live Interactive Doppler Radar
Tuesday Morning Through The Afternoon
Dense fog through the day at upper elevations, with cloud bases slowly lifting or partially lifting off middle elevations. Chance of light rain and drizzle. Winds N-NE at 5-15 mph with higher gusts, especially along mountain ridges. Temperatures mainly in the 50s to around 60 degrees (40s to low 50s at highest elevations), warmer across river valleys of the Clinch, Powell, and Holston.