Fog is a visibility problem more than a temperature problem. Drivers and runners should read condition wording and sky icons for mist or fog even when the thermometer looks fine.
Valley towns and coasts can hold fog after hills clear. If you pin both, expect timing differences on the same morning.
Meridian does not replace highway or aviation visibility products. Use it as a heads-up to check official travel advice before early starts.
As sun rises, fog often lifts — the hourly strip helps you see whether your departure sits inside or after that window.
