Freezing Fog Advisory Issued for Oregon’s Southern Blue Mountains
The National Weather Service has issued a freezing fog advisory, effective from 11:44 p.m. Friday until 10 a.m. Saturday, for the Foothills of the Southern Blue Mountains in Oregon. The advisory warns of visibility drops to one-quarter mile or less due to freezing fog—a condition that can create hazardous driving conditions. Motorists are urged to slow down, use headlights, and maintain increased spacing between vehicles.
Freezing fog occurs when surface temperatures fall to or below freezing, allowing tiny droplets of supercooled liquid to form. These droplets freeze upon contact with surfaces, producing rime, or delicate ice structures, which can coat roads, vehicles, and vegetation. The phenomenon significantly heightens transportation risks, particularly on roadways where black ice—an almost invisible layer of clear ice—can form, creating a deceptive danger for drivers.
To navigate these perilous conditions safely, travelers are advised to prioritize visibility by using low-beam headlights and to avoid high-beams which may increase glare. Staying vigilant and reducing speed is crucial, especially in areas where icy conditions are likely. Additionally, maintaining a significant following distance and adhering to lane markings can assist in safe navigation.
In aviation, even thin ice accumulate on aircraft can result in severe risks, emphasizing the importance of proper de-icing treatments before flights.
As freezing fog envelops the region, residents and travelers must exercise caution and remain informed. Knowledge and vigilance are vital for ensuring safety during these challenging weather conditions.
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