Although the rain shadow shielded most of the Puget Sound lowlands from the heaviest rainfall from an atmospheric river that flowed through the area early Monday, it doesn’t mean it won’t be wet for the whole day.
It will be a mostly wet week, according to Seattle’s National Weather Service.
Rain and gusty winds from the southwest will last most of Monday, although the temperatures will briefly be warmer, said meteorologist Justin Pullin early Monday morning. Seattle’s rain shadow – described by NWS as “the area of reduced rainfall on the leeward side of a mountain barrier caused by the air heating and the removal of turbidity as the air descends through the barrier” – limited rainfall early Monday.
“We don’t expect too many inches today,” he said. “Our heavier rain was last night.”
Heavy rain in the mountain passes led to the closure of the three main routes over the cascades – Snoqualmie Pass, Stevens Pass and White Pass – due to increased avalanche risk. The Washington State Department of Transportation said the closings will be re-evaluated on Monday and announced shortly before 8:15 a.m. that the White Pass will reopen at 10 a.m., although WSDOT is still evaluating the other two passes.
We saw a lot of slides and weather on the passes overnight. There are five natural slides on the Stevens Pass. There is still a lot of work to be done to clean up and evaluate before we are sure things are safe. https://t.co/FYntuq4wBD
– Washington State DOT (@wsdot) February 22, 2021
NWS issued a flood watch shortly after 9 a.m. on Monday in Counties King and Lewis. By the end of Monday, after an expected high of 52 degrees, according to pull-in, the rain will have subsided into hit-or-miss showers, but don’t think it’s spring.
A cold front is expected to move in, bringing the possibility of isolated thunderstorms and plummeting temperatures back into the mid-30s by Tuesday evening, he said.
After a short dry break on Wednesday, during which a glimpse into the sun is possible, “we’ll get wet and active again to end the week,” said Pullin.
It’s also possible that the weekend could be dry, despite Pullin ‘saying he doesn’t know if he would go as far as to predict nice weather.
“I’m not sure about that,” he said.
Do you want weather updates via SMS?
Write the word WEATHER at 855-480-9667 or enter your phone number below.