Winter Weather in Lower Chehalis Valley Area, Washington

A period of winter weather set in at the beginning of December, generally resulting in an average of 1 inch of new snow Dec 1-3.

A period of wintry weather was noted across the Western Washington lowlands at the beginning of December, earlier than what is typically experienced. Snow began at the end of November with several rounds continuing through the first few days of September. While accumulations did not meet winter storm criteria Dec 1-2, widespread heavy snow accumulations were experienced on Dec 3. These conditions were largely due to Fraser outflow in the low levels. with deep upper troughing in the upper levels.