I thought it would be fun to have a running topic where we can post major events on this day in history. I'm mainly looking for events for the PNW Western Lowlands, but major events for anywhere in the West are welcome.
I'll start it off with November 18th...
The big cold wave / snow events in November 1985 were just getting started on this date. My daily temperature range was 35-26 with just a trace of snow on the ground, but much more was very near. Landsburg already had 2 inches on the ground.
Sea-Tac Airport had a massive 9.4" dump with a low of 28 in 1946.
EDIT: Upon further investigation it's obvious the 1946 snowstorm was a classic AR event that turned to snow well before the moisture ran out.