By Michael Doll – AccuWeather
On the heels of a storm that produced wind gusts of 100 mph and caused electricity disruptions to tens of thousands of customers, another storm will strengthen in the northeastern Pacific and slam the Northwest early this week.
Another bout of drenching rain and tree-toppling winds is expected from the northwestern U.S. to British Columbia late on Monday into Tuesday.
This next storm will take shape as a result of a merger between one storm and a rare northeastern Pacific tropical system.
Ana is currently tracking northeastward in an area of the Pacific where very few tropical systems have tracked before.
Ana will merge with another storm to its northwest and form a single storm over the northeastern Pacific on Monday.
While the new storm will lose its tropical characteristics, it will still have the added moisture and energy to bring heavy rainfall and winds strong enough to bring down trees and power lines.
Rain will overspread areas from western Oregon to western British Columbia late on Monday through Tuesday, and some of it can fall heavily at times.
The Pacific Northwest has already received an abundance of rainfall over the past week and the additional rainfall could cause some flooding in spots.
Some of the coastal ranges have received over 5 inches of rain since Oct. 19, while parts of the Olympics have seen over 10 inches.
Places like Seattle and Vancouver, British Columbia, could have another inch or more of rainfall. The coastal ranges and foothills of the Cascades may receive another 4 inches or more.
Snow levels in the Cascades will be above pass level on Monday night and Tuesday. This will be one less concern for travelers going through Snoqualmie and Stevens passes in Washington, but wet roads and gusty winds will make for less than ideal driving conditions.
Wind gusts along the coast could exceed 60 mph with gusts of 40 to 50 mph farther inland. Gusts of 40 mph or higher are possible for Seattle and Portland, Oregon.
Additional disruptions to electricity service are possible on Monday night into Tuesday.
This is unwelcome news for those that lost electricity on Saturday night across the region.
Crews from Seattle City Light and Puget Sound Energy will certainly look to restore power on Sunday and Monday before the next storm arrives.
At one point on Saturday night, over 144,000 electric utility customers were without power in the Seattle metro and Puget Sound areas.
Flights coming in and out of Sea-Tac Airport and Portland International could be delayed as a result of the winds and reduced visibility.
Calmer weather will follow for the region on Wednesday with more rain expected late in the week.