Today will deliver one last day of very warm and dry conditions across the Willamette Valley and Umpqua Basin, although afternoon high temperatures will be slightly cooler than the past couple of days, generally in the upper 80s to low 90s.
A significant weather pattern change to cooler and wetter conditions begins later today and continues through the weekend, as an upper-level low pressure system moves into the Pacific Northwest from the Gulf of Alaska.
Temperatures will cool to near normal, with highs in the mid-70s across the interior lowlands on Friday. A cold front is expected to reach the coast by late today and spread into the I-5 corridor by late tonight into Friday morning, bringing widespread rain…