Seattle weather: Rain, mountain snow ramp up Wednesday

As we count down to the Astronomical Spring, you might be surprised to know a Meteorological Spring has already started. So what's the difference? Meteorological Spring starts on March 1 and runs through May.

This is when official NOAA records are kept for consistency. Astronomical Spring starts when the sun is positioned along the equator, so you end up with equal amounts of daylight and night hours, known as the equinox.

What's the difference between Meteorological Spring and astronomical Spring?

Meteorological Spring starts March 1st but astronomical Spring starts March 20th.

After an afternoon with near normal highs in the low 50s on Tuesday, our overnight lows will hover around the low to mid 50s into Wednesday morning.

Forecast lows around the region.

Overnight lows in the low to mid 40s by early Wednesday morning. 

What's next:

A front will slide through the region late Tuesday night and during the day on Wednesday, increasing rain chances in the lowlands and mountain snow beginning tonight. While the rain will generally be light this evening, it will increase in coverage late tonight.

Increasing rain tonight around the region.

A front will slide through the region with more showers developing behind it. 

Damp days ahead with an unsettled weather pattern bringing more chances of rain. Along with lowland rain, we continue to see chances for mountain snow throughout the week as snow levels hover around 3000–5000 feet.

The extended forecast for the Seattle metro area.

Damp days ahead with an unsettled weather pattern bringing more chances of rain. 

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The Source: Information in this story comes from weather models interpreted by the FOX 13 Seattle weather team.

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