October 15, 2025

What a Change A Week Makes

A week ago, there was no snow on the mountains and major smoke from wildfires on the eastern slopes of the Cascades.


Monday morning, lots of snow in the mountains and no apparent smoke.


A week ago, several surface monitors indicated poor quality with very bad air near Wenatchee.


Monday morning, nearly all sensors showed good air quality (green).


A week ago, the Snoqualmie River (near Carnation) was at record low levels for the date.  This is no longer true, and soon the river will rise to ABOVE normal levels.


Temperatures that were consistently rising above average highs are now consistently below normal highs, as illustrated by a plot of high and low temperatures at SeaTac airport.


A major weather shift since last week.  

And after a few dry days, expect rain to return Friday and  into the weekend (see total through Monday morning below).   

Moderate to heavy rain on the western sides of regional mountains and a nice rainshadow from Seattle northward over the lowlands.  Enjoy.






11 comments:

  1. Tuesday morning 10/14 the temp was 38 degrees at Spiritridge, Bellevue near I-90. The new season is here.

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  2. I heard Bremerton may have gotten down to 37 one night this week. The seasons are a changin'.

    I am enjoying the weather we're having presently though. Clear blue skies, lots of sun, ample shade, and a crisp feeling in thr air. Perfect fall weather for the Pacific Northwest!

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  3. KELN Ellensburg "matched" a record low (21°) early morning on the 14th, Tuesday. Northeast of the airport about 5 miles and 500 feet higher, I had 19°.

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  4. We have had frost here in Snohomish and temperatures around 30 the last couple of nights. Love the cold nights and the sunny days. Looks like rain's a'coming though.

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  5. No such thing as a "nice" rain shadow!...All areas of W. Washington need more rain.

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  6. KBLI dropped to 30F on Wednesday morning - the earliest freeze since 2019 and 10 days ahead of the current 30 year mean first freeze date.

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  7. There's a spot on my typical bike route with a great view of Whitehorse and Three Fingers. On Saturday, they were both barren, and on Sunday they were obfuscated by clouds. On Monday's ride, I descended the hill with the great view and I was somewhat surprised to see the mountains had gotten strikingly white. It's nice to look at, but it's a subtle reminder that the lowlands still have two months of gradually deteriorating weather ahead. The weather right now is peak fall, I wish it would stick around until Christmas!

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  8. I measured 32oF this morning at 800AM in Birdsview, Concrete, WA at about 250 ft altitude. Davis Instruments Vantage Pro2.

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  9. Most definitely the seasons are a changin'. Wednesday morning in Tacoma, it dropped to 37F. Had to scrape the windshield before leaving for work at 6AM.

    Cold enough that my flannels are on the bed, and have for a week or so.

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  10. We've had four frosty nights in a row up here in the valley near Mt Baker (31.5, 28.9, 29.5, 31.5 F) - looking forward to having a blanket of clouds roll in to warm things up. Clear nights are SO nippy!

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  11. Hi Cliff, could you do a piece on the storm that hit Alaska? Was it analogous to the Columbus Day storm of 1962?

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