An extreme weather pattern is set to develop as a strong ridge builds into the area where the Aleutian low pressure system is usually at. This is set to push the Aleutian low further down stream into the Pacific NW, which could unleash a tsunami of low pressure systems into the Western US.
From NWS Portland AFD
Impacts from this could be high, a magnitude 9 out of 10. The cold airmass seems to be going nowhere for now.
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