Special Weather Statement issued February 21 at 7:51AM EST by NWS

…PATCH DENSE FOG WILL PERSIST THROUGH MUCH OF THE MORNING… Patchy dense fog will continue across the region through much of the morning. Visibilities will drop to near or below one quarter of a mile at times in spots. Motorists should be prepared to encounter areas of greatly reduced visibilities, allow for increased distance between vehicles and

Source: National Weather Service Alerts for Vermont