Fall has definitely arrived. The first wave will be moving out of the region Thursday with a few residual showers and high temperatures falling to the mid-60s. Temperatures rebound on Friday to about 70 degrees with dry conditions and partly cloudy skies. The next storm system digs through the Pacific Northwest over the weekend, dropping temperatures again into the 60s, and giving us a slight chance of some showers Saturday. As skies clear out late Sunday, we can expect some very cold temperatures Monday morning, and the colder microclimates will likely see some significant frosts.