Sierra cement, yellow snow, pineapple express. Haboob, Texas norther, bomb cyclone. They seem like ridiculous terms used to describe a messy bedroom or types of ice cream. But they’re actually weather ...

Editor’s note: The KOIN 6 Weather team is presenting weather and science lessons to help serve our teachers and students. Click here for more lessons. PORTLAND, Ore. (KOIN) — Sometimes weather and ...