Dense Fog Blankets NC Mountain Valleys, I-26 and I-40 Affected
Dense fog continues to create hazardous driving conditions along I-26 and I-40 in western NC mountains this morning.

ASHEVILLE, NORTH CAROLINA β Dense fog continued to impact mountain valleys across western North Carolina on Tuesday morning, prompting the National Weather Service to issue a special weather statement warning motorists of suddenly changing visibility conditions.
The fog advisory, issued at 3:57 AM EDT by the National Weather Service office in Greenville-Spartanburg, South Carolina, highlighted dangerous driving conditions along major interstate corridors including I-26 in the Asheville and Hendersonville areas and I-40 through the Pigeon River gorge.
Visibility Concerns for Morning Commuters
According to the weather service, visibility may decrease suddenly and over short distances in the affected mountain valleys. The fog conditions pose particular risks for motorists during the morning commute hours.
Weather officials advised drivers to slow down, increase following distance, and turn on low-beam headlights when traveling through the fog-affected areas. The use of high-beam headlights is not recommended in foggy conditions as they can reflect off water droplets and reduce visibility further.
Expected Improvement After Sunrise
The National Weather Service reported that the fog is expected to burn off shortly after sunrise as temperatures warm and atmospheric conditions change. Mountain valleys are particularly susceptible to fog formation during overnight hours when cooler air settles in low-lying areas.
The weather advisory emphasized that motorists should use extra caution when traveling through the affected regions during Tuesday morning. The Pigeon River gorge area along I-40, which connects Tennessee and North Carolina through mountainous terrain, is known for challenging driving conditions during foggy weather.
Safety Recommendations
Transportation officials regularly advise drivers to adjust their driving habits during foggy conditions. Reduced speeds allow for better reaction time when visibility is compromised, while increased following distances provide additional stopping room.
The fog advisory covers the mountainous regions of western North Carolina, where elevation changes and valley formations create ideal conditions for fog development during certain weather patterns. These areas experience fog more frequently than surrounding regions due to their topographical characteristics.

