Delightful Weekend Ahead

Posted by Rufus La Lone on

Monday January 17
Not a lot of precipitation ahead for the rest of January.  A delightful weekend is coming soon.  Refill time.
A very weak system will usher in showers at times for areas mainly north of Chehalis / Olympia later today through Tue.  NW OR may catch a shower here & there, but should miss most of the precipitation.  A system due in later on Wed will carry a bit more moisture, so expect rain & showers overnight Wed Jan 19 into Thu the 20th for both OR & WA; NW WA will be get the most rainfall.  By Friday, high pressure will rebuild & center east of the Cascades, setting up an offshore breeze for the coming weekend.  Nice.
Yes, Spring-like temps are possible again this coming weekend - Jan 22,23 - esp for western OR.  As noted above, an offshore breeze should minimize the foggy mornings and present a sunny blue sky with temps in the upper 50s (maybe even lower 60s in southern OR).  Strong east WINDS across most of California.
The offshore air flow component will diminish as the week of Jan 24th get under way, allowing for foggy-bottoms to return in the usual locations (ie: southern Willamette Valley, etc).  A Low may drift south, off the PNW coast, but should not yield much precipitation inland.  By later that week, we are seeing all kinds of solutions on the model charts, so we’ll simply report the trend is for continued dry conditions, with increasing chance for rain returning by the last weekend of January.  Some solutions develop a rather strong storm system moving down along the Alaskan Panhandle/BC coast, which, if it verifies, may return the PNW to a wintery pattern (coastal & Cascade range snow and notably colder temps).
Early February continues to look COLDER with snow levels dropping below Cascade passes & into the coast ranges, as well as across the eastern basins.  We’ll have to wait for long-range charts to settle down, but for now, we will caution that another round of wintery weather cannot be ruled out for early February (and, we will be monitoring another Yukon High pressure ridge above 1040 mb).  Keep your Mug handy.
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