National Weather Service - Portland has issued a Special Weather Statement at 4:00 p.m. today:
The air mass over northwest Oregon and southwest Washington is cool and unstable this afternoon and evening due to the recent passage of a cold front. This pattern can produce what is called cold air funnel clouds. These funnels do not usually touch the ground. However... if they do touch the ground they are dangerous and can be damaging. Had a third party report of what appears to be one of these near Tangent Oregon this afternoon. In the last hour... some thunderstorms have begun to develop over portions of the area. The potential for this event should decrease after sunset.