Forecast Details for Saint Marie, MT

Recent Locations: Saint Marie, MT

Tonight: Mostly cloudy, then gradually becoming clear, with a low around 9. Wind chill values between -10 and zero. East southeast wind 8 to 17 mph, with gusts as high as 24 mph.

Monday: Mostly sunny, with a high near 39. West southwest wind 6 to 14 mph, with gusts as high as 20 mph.

Monday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 18. West northwest wind 15 to 18 mph, with gusts as high as 25 mph.

Tuesday: Sunny, with a high near 32. Northwest wind 11 to 14 mph, with gusts as high as 20 mph.

Tuesday Night: A 40 percent chance of snow, mainly after 11pm. Partly cloudy, with a low around 18. West northwest wind 7 to 9 mph becoming southeast in the evening. New snow accumulation of less than a half inch possible.

Wednesday: A 30 percent chance of snow before 11am. Mostly sunny, with a high near 37. South southeast wind 10 to 17 mph becoming west northwest in the morning. Winds could gust as high as 23 mph. New snow accumulation of less than a half inch possible.

Wednesday Night: Partly cloudy, with a low around 24. Breezy, with a west wind 16 to 22 mph, with gusts as high as 28 mph.

Thursday: A 10 percent chance of rain after 5pm. Sunny, with a high near 44. Breezy, with a west wind 21 to 29 mph, with gusts as high as 34 mph.

Thursday Night: A slight chance of rain and snow before 8pm, then a slight chance of snow. Partly cloudy, with a low around 22. Breezy, with a west wind around 25 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

Friday: A 30 percent chance of snow. Partly sunny, with a high near 32. Breezy, with a north northwest wind around 24 mph, with gusts as high as 31 mph.

Friday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 5. Blustery, with a north wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 28 mph.

Saturday: A slight chance of snow. Mostly sunny, with a high near 19.

Saturday Night: Partly cloudy, with a low around 5.

Sunday: Mostly sunny, with a high near 26.

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain