... Coolest weather so far this season expected this week...
The coolest weather so far this season is expected through Wednesday
before temperatures begin to recover Thursday and Friday.
A chilly air mass will be left behind after precipitation tapers off
Tuesday night... leading to chilly overnight night lows Tuesday and
Wednesday nights. Wednesday night could be the coldest night so far
this season for most valley locations. Outlying valleys are expected
to dip into the upper 30s... with more urban areas falling well into
the 40s. Some high elevation valleys... and possibly the Upper Hood
River Valley... may see their first frost of the season Thursday
Recreationalists hiking or camping... especially in the Cascades...
should prepare themselves for the chilly autumn weather early
this week. People in the typically colder outlying valleys may
want to consider protecting their plants against frost... in case
temperatures fall a couple degrees lower than currently expected