Washburn, ME – A rare atmospheric inversion is causing low visibility and a unique optical effect known as a “sun dog” this morning in Washburn, ME. Drivers in the area, particularly near Castle Hill Road, are urged to proceed cautiously due to dense fog and the sudden emergence of this meteorological phenomenon.
According to the National Weather Service in Caribou, a steep temperature inversion formed today, with surface temperatures recorded at 44.6°F and temperatures at 1,739 feet above the ground reaching 64.5°F. This sharp temperature difference caused steam rising from a local potato processing plant to cool rapidly, creating the conditions for a visible “sun dog.” The steam’s quick cooling and flattening in the warmer air above led to optical effects and fog formation.
Motorists should be aware of the low visibility caused by the fog and sun dog, which may lead to delays on local roads.
