Why journey to the northern climes when Arctic air is coming to you?
Excessive strain and really chilly air at the moment are shifting into British Columbia.
It wish to attain us, however the mountains–the Rockies and Cascades–are initially blocking it.
However like like a marginal soccer group, there are gaps in our protection. Actually gaps in our terrain.
And the chilly offense is about to make a profitable finish run to attain a frosty purpose.
Let me present you….
The state of affairs this morning reveals chilly temperatures (purple and brown colours) within the Canadian Arctic. An intense strain change is on the interface between heat air to the southwst and chilly air within the inside.
Zooming in temperatures and winds in Washington State, at 10 AM in the present day the state was divided by Cascades (similar to our politics!). Chilly within the east (purple colours) and hotter within the west (inexperienced colours).
By tonight at 10 PM, a lot colder air strikes into southern BC (whereas shades), and cooler air pushes via the Fraser River valley north of BC and into NW Washington.
Sunday morning at 7 AM, colder air is pushing south into the Okanagon River Valley in north central Washington and modifed arctic air is surging within the Northwest Washington, pushed by robust northeasterly winds escaping the Fraser River Valley,
The method continues via Sunday at 10 PM and in the event you look fastidiously you will note northerly winds pushing into Puget Sound. Chilly air is de facto shifting southward into japanese Washington.
What about snow tonight and tomorrow?
Precipitation is already shifting into the area, however it’s falling as rain over the lowlands.
The snow complete forecast via 4 AM from the NOAA HRRR mannequin reveals mountain snow, however little over the lowlands with two excptions. (see under). The primary is round Bellingham, the place chilly air from the Fraser Valley will assist mild snow, and the second is on the northest facet of the Olympics, the place the Fraser Valley circulate is compelled upwards.
For the interval via 4 AM Monday, there may be extra NW Washington snow and a band of sunshine snow over Seattle. That’s most likely related to a weak convergence zone; it totals lower than 1 inch in its core. Southwest WA will get some mild snow as properly.
Later Sunday and Monday must be a dry, however chilly interval.
