In Seattle, if you can see the mountain, it's going to rain. If you can't
see the mtn it is raining!

Actually, Mt Tahoma is a an excellent forecaster of rain, all joking aside.

The first clear day that a cloud forms just above the summit is usually the
last day before it begins raining again. No wonder they renamed the moutain
Rainier. It's Rainier here than almost anywhere else.