The National Weather Service is forecasting an unusual spring windstorm this evening and into early Tuesday morning that could result in isolated power outages.

The strong late-season Pacific frontal system is expected to pack sustained winds of 30 mph, with gusts up to 45 mph, in the interior of Western Washington, with 45 mph sustained winds and 60 mph gusts on the coast and Strait of Juan de Fuca.

The storm would not be much of a blip on the radar if this was winter, according to Ted Buehner, a warning coordination meteorologist for the National Weather Service.

However, trees have leafed out, which means a greater likelihood of downed limbs and trees, he said, which could lead to damaged power lines and outages.

The lowlands can expect a quarter-inch to an inch of rain, with up to three inches in the mountains, according to the weather service.

No flooding is expected, but there is an increased chance of avalanches in the mountains because of the wind and the rain falling on snow.

For more information, go to the National Weather ServiceWeb site.

Another Pacific weather system will hit Western Washington on Wednesday with more rain, but not much wind, according to the weather service.

Drier spring weather is forecast starting Thursday and lasting through the Mother’s Day weekend.