Here comes Western Washington's first frost

Why it matters: Up to 20 inches of snow could accumulate in the mountain passes, potentially causing dangerous driving conditions, according to the National Weather Service.

Details: Freezing overnight temperatures are expected tonight in much of inland Western Washington, weather service meteorologist Matthew Cullen told Axios.

• Gusts of up to 20 miles per hour are also possible.
• A second weather front, drier but colder, is likely to arrive Thursday, he said.

That could bring overnight lows in the mid-30s to Seattle and the mid-20s to foothills and valleys in the Puget Sound region, said meteorologist Kayla Mazurkiewicz.