Fog can occur during a warm front.
A weather front can be a cold front, a warm front or an occlusion.
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"A warm front brings light to moderate continuous rain and fog" this is from What weather does a warm front bring? What weather does a cold front bring? - Yahoo! Answers
it when a cold front and a warm front meet
Warm.
Warm air, which brings warm temperatures.
statinary
a warm front
Warm front
a warm front
In drizzly rain followed by clear warm weather, a warm front typically forms. This occurs when warm, moist air rises over cooler air, resulting in precipitation as the air cools and condenses. Once the warm front passes, the weather clears as the warm air settles in, bringing higher temperatures and clearer skies. This transition often leads to a noticeable change in weather conditions.
A cold front normally moves at twice the speed of a warm front. An occluded front forms when a cold front catches up with a warm front. Occluded fronts are of two types:1. Cold occlusion : If the airmass of the advancing cold front is colder than the cool airmass of the warm front, the advancing cold front undercuts and lifts both the warm and cool airmass of the warm front. The weather is initially warm front type but during the passage of front, showery weather of cold front occurs. This occlusion is common in summer. 2. Warm occlusion : When the airmass behind the advancing cold front is less colder (cool) than the cold airmass of the warm front ahead, the advancing cold front overrides the warm front ahead. The weather in such a case is similar to that of warm front. This type of occlusion occurs in winters and is less common.