A weak system sweeping through the Pacific Northwest on this final Tuesday of April is spreading rain and mountain snow showers across the Northwest and the northern Great Basin.
An upper-level disturbance moving onshore from the Pacific Ocean is bringing the risk of rain and mountain snow showers from Washington and Oregon into Idaho and western Montana for much of Tuesday. Any light snow will be confined to the highest elevations of the region.
There could even be an isolated thunderstorm in western Washington or northwestern Oregon on Tuesday afternoon and into the early-evening hours.
Total rainfall amounts will be less than a half-inch, and any snow will stay above pass level, so we don't expect any impacts to road or air travel.
This system will weaken Tuesday evening and eventually dissipate Tuesday night, bringing an end to the showers across these areas.
Drier conditions will return to most of the Northwest on Wednesday before the next system moves into the region on Thursday.