A late post tonight, but this one should get us through the weekend.
Saturday looks to be a repeat of Friday, as the strong ridge continues its hold over the Northwest. With the sunshine (after AM fog), we should easily reach the mid 60s again Saturday afternoon.
Everything changes Sunday. A cold, but weak system drops out of the Northwest… allowing the coldest air of the season-to-date to plunge into the Northern Rockies and Northern Plains States. Some of that chilly air will make it west of the Cascades… courtesy of the east wind that I expect will pick up Sunday night or Monday morning. With the front’s passage Sunday, there is an opportunity for a little light rain… with the best chance of that happening in the morning.
How cold will the arriving cold air be? I’m thinking low-mid 50s for highs Monday and Tuesday… and lows could be anywhere from 25 to 37 — depending on the wind. Windy areas (such as Troutdale, PDX, and along the Cascade foothills) may not have a freeze… but valley locations where the wind dies down could have their first widespread hard freeze of the season early next week.
After Wednesday, the models are hinting that a pattern change towards mild and wet weather may be coming. There is still no sign of any cold, wet storms that are necessary to start building the Cascade snowpack. Bummer…
Enjoy the weekend… especially Saturday’s sunshine!
– Drew J
PS – Mark returns Monday… the day we move into our brand new weather center!!! (But you won’t see it on TV for at least another week…)