Fog will persist throughout the night, mainly in the valleys, and will be locally dense in spots. It will dissipate for most impacted areas by 8am or 9am this morning. Motorists should use caution and be prepared for sudden changes in visibility. Keep greater distance between vehicles, use low beam headlights, and allow more time to reach your destination safely.

Areas of fog have developed across the region this morning. The fog is locally dense, with visibilities of a quarter of a mile or less in some locations, especially in the river valleys. The fog will continue through early this morning, before dissipating after sunrise. Use caution if traveling this morning. Slow down and allow extra time to reach your destination.