SEATTLE — Western Washington is in for its liveliest storm of the season so far, with wet and gusty conditions forecast across the lowlands into Tuesday and another healthy dose of snow in the mountains.

“A strong storm system will move into the region starting Sunday night and continuing into early Tuesday, bringing heavy snow to the mountains, strong winds to much of the region, and high surf along the Pacific Coast beaches,” NWS Seattle summarized Sunday. “Expect 1 to 2 feet of snow at the Cascade passes Sunday night through early Tuesday, with higher amounts in the higher elevations. This snow, along with strong winds, may create poor visibility, difficult travel, and dangerous conditions.”

A wind advisory will be in place for most of Puget Sound until after dusk Monday, as forecasters predict gusts as high as 40 mph around Seattle and winds strongest along the Strait.

Monday will also pack the potential for isolated thunderstorms developing across the region, with higher changes along the coast and on the Olympic Peninsula.

Forecasters said the incoming influx of rain could lead to some inundation for low-lying and flood-prone areas, as some rivers experience rapid rises, but widespread flooding is not expected. As of Sunday evening, only the Skokomish River in Mason County was forecast to hit flood stage.

For those with trips planned over the Cascades, Snoqualmie Pass may pick up more than a foot of fresh snow before Wednesday morning, while Stevens Pass could see closer to two feet. The Northwest Avalanche Center warned that very dangerous conditions could persist through Tuesday.

Fortunately, the weather is poised to calm down, dry out, and warm up starting Wednesday, with temperatures on track to break into the mid-60s for most by Thursday. Parts of the Southwest Interior could even hit 70 degrees.

Here is the five-day weather outlook for the Seattle area:

• Monday: 49°/41° (Showers/wind advisory)
• Tuesday: 52°/36° (Chance of rain)
• Wednesday: 58°/41° (Mostly sunny)
• Thursday: 66°/47° (Partly sunny)
• Friday: 56°/42° (Chance of rain)