If this had been December or January I’d be searching for my snow shovel, bag of deicer, and windshield scraper.
A good climate sample for lowland snow will likely be in place on Friday, however this IS mid-October, with the bottom and ambiance nonetheless comparatively heat from summer time heating.
Not fairly this dangerous. Picture by cheukiecfu
But should you imagine the fashions, some people over Northwest Washington will see snowflakes on Friday and bountiful snow will hit the Cascades and jap Washington.
Let me present the newest forecast maps….you may be searching for a sizzling chocolate and a wool cap earlier than I’m completed.
Tomorrow (Wednesday) will give the mountains a small style of the upcoming white deal with, with a ridge of excessive strain/heights offshore and a trough of decrease strain shifting into the northwest (see higher degree map under). The end result will
be some mild snow within the Cascades, with as a lot as Eight inches at larger elevations.
Doesn’t excite you? Just wait.
Below is the 24-h snowfall forecast ending 5 PM Friday for the UW excessive decision WRF forecasting system.
Wow. 8-12 inches over the Cascades and Olympics, bountiful snow over a lot of jap Washington, and even snow at sea degree north of Bellingham. High temperatures for Friday won’t get out of the 40s.
Some mannequin forecasts are much more aggressive with lowland snow. The newest European Center snow prediction for a similar interval even brings some snow to Everett (see under).
The sea degree strain sample forecast for Friday is traditional for Puget Sound snow. Below is the ocean degree strain forecast (strong traces) for five PM Friday. Surface winds are proven as are low-level temperatures (purple is coldest, adopted by blue and white).
A good (for snow) arrange, with low strain centered over southwest WA, and a big north-south strain distinction over western WA, which is able to usher in cool air from BC. Not fairly good for Seattle snow … having a stronger low on the coast and colder sir in BC could be higher…. however who’s going to complain in October? An excellent sample for snow east of the Cascade crest.
Early subsequent week the upper-level ridge will strengthen and lengthen in direction of the coast, and the trough will push southward in direction of Arizona. (see higher degree map for Tuesday at 5 PM). Expect fast warming and snow soften right here in Washington State.
But there’s something very ominous on this evolution. Cold air and related excessive strain will transfer into the intermountain West and a robust strain gradient will type over the Sierra Nevada (see floor strain map, with low degree temperatures for 11 AM Monday). Such robust strain variations might drive highly effective winds which may provoke or rev up wildfires in CA. Will have to look at this.
Finally, what was the earliest main snowfall at Sea Tac? It was October 27, 1971 when 2 inches fell. We will not beat on Friday.
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