More cold weather here and California is doomed...

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Cheery news from Cliff Mass:

A Surge of Cold, Dry Air Envelopes the Northwest and Now Threatens California
Last night, very cold, dry air surged southward out of Canada, pushing into Washington and Oregon.

The pressures, temperature, and wind map for 8 AM this morning tells the story (below). The blue is cold air, with the primo stuff east of Cascades. Note the large pressure difference across the Cascades, which resulted in strong easterly winds in the Columbia Gorge and in Cascade mountain passes.

A bit more:

With very dry air above, the greenhouse warming effect of water vapor in the atmosphere will be lessened, and our temperatures should plummet tonight.  Be prepared for lots of frost when you go out tomorrow morning--and some cooler areas away from water will drop into the teens.

Already down (just checked) to 38°F and dropping. Last morning was a hard freeze with temps down to 30°F. Tomorrow morning will be solid. And California? Some folks just can not get a break:

But the real worry is for the folks in California.  The cold air moving south has an Amazon Prime account and the delivery will be overnight.   By tomorrow morning, the cold, dense air and associated high pressure will have moved southward through Nevada, setting up a large pressure difference across the Sierra Nevada (see map below for 5 AM Wednesday).  This pattern will set up Diablo winds for northern CA and Santa Ana winds for southern CA, threatening both areas.

Time to hunker down. I love the fall - crisp air and gorgeous foliage. Time to prepare for the winter dormancy and rebirth in spring. The cycles of the seasons. Once you learn to live with it, you do not need to fight it.

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This page contains a single entry by DaveH published on October 29, 2019 9:02 PM.

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