What Is A Warm Front?


By By Steve Pool

SEATTLE - As we mentioned in March 5th's column, a front is a boundary between warm air and cold air. With a warm front, you have an area of warm air moving in over colder air. You can pick them out on weather maps as red line with red semi-circles.

Since warm air is lighter than cold air, the warm air will ride over the top of the colder air, where it will cool, condense, and squeeze out moisture.

Warm fronts are generally weak weather-makers, bringing in a steady light rain or drizzle. It can also create fog as the warm air condenses as it meets up with the colder surface air. Since cold air is heavy and tough to budge, warm fronts can be slow-movers, keeping the rains around for dozens of hours.

For More Information:


Your Photos

YouNews Sunset Beach, Oak Harbor Sunset Beach, Oak Harbor
I took this photo tonight at 4:37. Just a calm and beautiful day on the Salish Sea.
YouNews Bordeaux & Paris Bordeaux & Paris

This is my UW daughter and her weekly video from Paris......I think she does a great job and would like to share with others.......especially touching seeing video of where the attacks happened and her feelings....a future news caster...