... Wet and windy week ahead for southwest Washington and northwest
A strong and wet Pacific frontal system will bring periods of
heavy rain and gusty winds to much of southwest Washington and
northwest Oregon starting today... continuing throughout the
midweek period before the front finally exits to our south and
east late Wednesday night or Thursday.
South winds will increase along the coast this afternoon as this
front approaches the Pacific northwest coastal waters. Winds
will be especially strong along the beaches and headlands... where
gusts of 60 to 70 mph are expected at times later today through
early Wednesday. Coastal communities may see gusts upwards of 50
mph as the front slowly sags down the coast tonight and Wednesday.
South winds will also pick up tonight into Wednesday for the
inland valleys and main Metro areas... where gusts of 30 to 40 mph
are possible. Many trees still have a full complement of leaves on
them... which could cause more limbs to break than is often the
case with such winds. As a result... some minor power outages are
possible as the gusty winds develop.
This frontal system also has a solid tap to tropical moisture...
which will enhance rainfall near the front as it slowly moves
through the area tonight through early Thursday. Rain will be
heavy at times along the coast and in the higher terrain... and
possibly in the inland valleys as well.
Currently... rainfall totals of around 2 inches are expected in
the inland valleys by Thursday afternoon. Coastal locations are
expected to receive 2 to 4 inches of rain... and 3 to 6 inches of
rain are forecast for most of the Coast Range and Cascades.
Leaves downed by the rain and gusty winds may clog storm drains
and exacerbate minor urban flooding issues as the rain becomes
heavier Wednesday into Wednesday night. Additionally... there is a
possibility of minor flooding on some faster responding small
streams and rivers due to the heavy rain. Burn scar areas from
recent wildfires in the Cascades may also be subject to debris
flows. All of this will be monitored closely over the coming days.
After a lull on Thursday... it is starting to appear that another
strong system could affect at least part of the area Friday into
this weekend. Details on this system are still quite uncertain...
but it appears southwest Washington and northwest Oregon is in for
a fairly extended period of wet and unsettled Fall weather.