What Is A Cold Front?

Tools

By By Steve Pool

SEATTLE - A front is a boundary between warm and cold air. With a cold front, you have an area of cold air moving into an area of warm air. You can pick them out on weather maps as a blue line with blue triangles. The triangles point in the direction the front is moving.

Since cold air is heavier than warm air, the cold air pushes underneath the warm air, causing the warm air to rise. The warm air then condenses as it reaches cooler altitudes, creating clouds and, eventually, precipitation.

If the difference in temperatures is very large, you can get a strong front that can create thunderstorms, or even tornadoes. Luckily around here, the Pacific Ocean keeps the temperatures differences to a minimum.

For More Information:

www.usatoday.com.

Your Photos

YouNews Chasing Rainbow. Chasing Rainbow.
While I was busy working, suddenly I turned my head towards the window to see a perfect rainbow and a cruise ship moving fast towards it. Frantically I grabbed my camera and ran to the balcony to take the shot just when the ship appeared to be entering the rainbow.
YouNews Seattle Couple Embraces Seattle Storm Seattle Couple Embraces Seattle Storm
A lot of guests had trouble getting to Nick and Jane's wedding, but there seemed to be a magical bubble around the wedding itself - sunny and only a few big gusts while safe in the church... until well into the cozy inside Broadmoor Golf Club reception.
YouNews Coudy and windy afternoon Coudy and windy afternoon
I took this photo this afternoon at Kerry Park. It was windy, cloudy and a few drizzles falling at times.