This weekend, the Smoky Mountains are forecast to experience dense fog, which may have a substantial impact on travel and outdoor activities. The fog, a common weather phenomenon in the area due to its distinctive topography and climate, forms when air near the ground cools to the dew point, causing water vapor to condense into small droplets. The high elevation and frequent temperature inversions of the Smoky Mountains make them particularly prone to fog, especially in the early morning. This weekend's fog is predicted to be very thick, significantly reducing visibility.