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 It's Quadruplets! It's Quadruplets!
On May 2, I found a newly built Dark-eyed Oregon Junco nest in one of my hanging baskets. By May 9 we had 4 eggs. This past Monday, May 18, the eggs hatched, 3 between 9am and noon, the final one during the night into Tuesday.
YouNews What can I say What can I say
I know this is a "played out" location - but I couldn't resist as the weather was so nice tonight!