... Near dangerous wind chill expected Friday night and Saturday
across the Cascades and through the Columbia River gorge...
Another surge of Arctic air will bring some of the coldest air
since December 2009 into the region late Friday... and remain over
the region this weekend. Expect daytime highs to be only in the
teens and 20s... and overnight lows to single digits to teens.
Coldest temperatures will be over the higher terrain.
At the same time... a strong pressure gradient over the Pacific
northwest will create very windy conditions over the Cascades and
foothills... and through the Columbia River gorge. East winds of 20
to 30 mph with gusts 45 to 50 mph can be expected over the
Cascades... with 25 to 40 mph with gusts to 60 mph in the western
Columbia River gorge Friday night and Saturday.
This combinations of gusty east winds and cold temperatures will
create dangerously low wind chill over the region Friday night and
Saturday. Wind chill values will run from 10 below to 10 above
during this time... but could drop as low as -20 degrees in
Those who must be outside should dress in adequate clothing and
minimize exposure. Pets and livestock are also affected by the
cold. Ensure pets and livestock have a warm dry shelter... and
access to food and fresh unfrozen water.
Frost bite can occur in less than 30 minutes... and hypothermia
may occur if precautions are not taken.