Time and Day: 0900 Monday
The Snapshot: It was exciting to see the dusting of snow in the
high country this morning. The rain will end today, mostly dry tomorrow, rain
returns on Wednesday, with heavy precipitation possible by the weekend.
The Science: The rain will fizzle away today as an upper-level
ridge drifts through the region. Tomorrow will be mostly dry with some sun
breaks.
Things get interesting on Wednesday when the first of a series of storms
begins to track through the Pacific NW. A
low-pressure cell developing off the Southern BC coast during the next few days
will act like a gear that directs the storm track into the region. The jet stream has shifted north and will entrain
a ton of moisture, strengthen the wind pressure gradients and allow cooler air into
the mix.
Long Range: Mountain snow?
Perhaps around 6000’on Wednesday/Thursday. Freezing levels rise to +-8000’ over the weekend
as a subtropical plume of moisture enters the area – i.e. heavy rain likely. The PNW seasonal rain/snow machine will remain
very active into early next week. Stay
tuned.
JM
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