Tuesday, June 18th, 3:30 AM
The marine layer is building back in from the coast, and many of us near the Portland metro will see our skies turn gray around sunrise. The marine layer will probably be with us throughout most of the morning before it burns off, so expect a slow warm-up. High pressure is also backing off of the Pacific Northwest, which will initiate a cooling trend starting today. High temps around the metro will top out in the mid to upper 70s, while the coast is expected to stay in the upper 50s and low 60s. We won’t see as much sunshine along the coast due to a thicker marine layer. Expect almost a repeat day on Wednesday, although temperatures will be several degrees cooler. Thursday could feature some drizzle and isolated showers as a trough of low pressure digs into the Northwest. Cloudier skies will help drop our high temps into the upper 60s, while a little bit of snow could occur on the Cascades. Snow levels are forecast to drop to roughly 5,000 feet Thursday, so the freezing line should be just above pass level. We can’t rule out a little wintry mix down near the passes, but it shouldn’t affect the roads. Conditions will dry out as we finish the week and start the weekend, and more sunshine should also emerge. High temps are expected to return to the low to mid 70s between Friday and Saturday, but could dip back into the upper 60s and low 70s by Sunday and Monday.
Have a great Tuesday!