And that is not all. Many locations in western Washington did not get above the mid-60s, resulting in the coldest daytime highs since mid-June...something illustrated at Sea Tac AP:
August 26, 2018
Rain, Better Air Quality, And the End of Major Heat Waves for Perhaps the Rest of the Summer
With the upper level trough passage today, increasing onshore flow and rain has greatly cleaned up the air over the entire region. In fact, as shown in the figure, the air quality over the Northwest hasn't been this good in months (green is the best).
And that is not all. Many locations in western Washington did not get above the mid-60s, resulting in the coldest daytime highs since mid-June...something illustrated at Sea Tac AP:
The latest long-range ensemble forecasts (running the models many times) suggests no heat wave (over 80F) for the next two weeks (the US/Canada NAEFS ensemble is shown below, temperatures are in °C, with 20C about 68F). And by mid-September the sun is weakening rapidly, so the chances of major heat declines.
Although we undoubtedly will get a taste of more Canadian smoke this week, concentrations will probably be modest.
And that is not all. Many locations in western Washington did not get above the mid-60s, resulting in the coldest daytime highs since mid-June...something illustrated at Sea Tac AP:
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Smoke in the West Means Relief in the East. The Big Threat Comes Later this Week
As predicted, the winds aloft have turned easterly (from the east), resulting in smoke from eastern Washington moving aloft over western Was...
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For those worried about below-normal mountain snow, your worries are over..... a major snow dump is ahead. You can also expect great skiing,... -
As predicted, the winds aloft have turned easterly (from the east), resulting in smoke from eastern Washington moving aloft over western Was...
Best news all week!
ReplyDeleteGreat to take a full breath while I watched the sun rise here in Dungeness this morning.
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ReplyDeleteIs it possible to make a generalization about what amount of rainfall is required to suppress fires? (A tenth of an inch, a quarter inch, half inch, inch? And would it need to fall within, say, 24 hours?) And, what would be a typical date by which such rainfall could be expected in the current burn areas creating all this smoke: (a) Vancouver Island (b) interior British Columbia (c) Along and east of the Cascades and eastern Washington (d) Oregon?
Wildfires are typically not completely suppressed until snow accumulates on the ground.
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