ALERT For Dense Fog At Mid-Upper Elevations Along And SW of the High Knob Massif-Tennessee Valley Divide ( This Includes The Town of Wise )
High Knob Massif Webcam – University Of Virginia’s College At Wise
Now that the low-level jet streak has passed ( which was only predicted here ) the ALERT is now changed to one for low clouds bases ( Dense Fog ) with SW upslope flow.
Lonesome Pine Airport
Travelers should use extreme caution along U.S. 23 through the head of Powell Valley where this type of flow can often generate some of the most dense fog.
Former Alert
ALERT For A Period Of Strong SSW to WSW Winds Developing Into Friday Morning — Especially At The Middle-Upper Elevations
A low-level jet streak near the 850 MB level will move over the mountains into Friday morning. Wind gusts of 20-40+ mph will develop at mid-upper elevations, with local gusts over 50 mph being possible on the highest peaks.
*Rain showers will continue overnight into morning hours of Friday, becoming increasingly wind driven and locally heavy. Downpours will be most likely with strong SW upslope flow into the High Knob Massif and Tennessee Valley Divide.
Expect the high country to be engulfed in clouds, with fog drip from trees adding to rainfall, throughout Friday into Saturday morning across the High Knob Massif.
*A wet pattern will continue into early Sunday with another round of strong winds. Another ALERT may be needed on Saturday.
Another prolonged period in the clouds, with fog drip from trees, will develop later Saturday into Sunday at the upper elevations in the High Knob Massif.
*A wintry pattern develops next week. Systems with possible accumulating snow are being monitored for the December 4-6 and December 8-9 periods. Stay tuned for later timing updates.
