What Makes A Rain Forest?

Tools

By By Steve Pool

SEATTLE - A rain forest generally needs two ingredients -- a moist airflow and some mountainous terrain. In the Olympic Rain Forest's case, our general weather pattern features a constant west or southwest flow off the Pacific Ocean. That of course, carries a lot of moisture along from being over the ocean for thousands of miles.

As that flow hits the west and southwest side of the Olympics, the terrain forces the air upward. As air rises, it cools and condenses, squeezing out its abundant moisture and soon, you've got a rain forest. The Olympic rain forests gets over 200 inches of rain a year.

Hawaii has rain forests from the tropical trade winds running into their mountains, and South America has gobs of rain forests from the moist flow running into the Andes Mountains.

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.