High pressure will slide offshore early today, while a developing warm front edges northward from the Ohio Valley. The lingering effects of the high will keep the summits mainly clear this morning, but the approach of the front combined with daytime heating will result in the development of midday clouds, which will land the summits in and out of the fog through the afternoon hours. In addition, a late-day rain shower or two is possible, a risk that will carry over into the early part of tonight. After topping out near the 40 degree mark today, temperatures will recede well into the 30s overnight, with continued light winds, and clearing skies. With the weather map remaining relatively unchanged, the same sort of scenario will progress for Sunday, with early morning clear skies giving way to afternoon cloudiness and periodic fog.