Forecast Details for Big Sky, MT

Recent Locations: Worland, WY South San Francisco, CA Big Sky, MT

Overnight: Areas of smoke. Mostly cloudy, with a low around 48. West southwest wind around 6 mph becoming south southeast.

Sunday: A 40 percent chance of showers, mainly after noon. Areas of smoke before 5pm. Partly sunny, with a high near 66. Light southwest wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

Sunday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Widespread haze. Mostly cloudy, then gradually becoming mostly clear, with a low around 45. West wind 5 to 7 mph becoming south southwest in the evening. Chance of precipitation is 30%.

Monday: Widespread haze before 7am. Sunny, with a high near 67. Light and variable wind becoming west 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

Monday Night: Partly cloudy, with a low around 46. West wind around 6 mph becoming light and variable after midnight.

Tuesday: A 40 percent chance of showers after noon. Mostly cloudy, with a high near 63. Calm wind becoming south around 6 mph in the afternoon.

Tuesday Night: A 30 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 43. South southeast wind 3 to 6 mph.

Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 61. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

Wednesday Night: A chance of showers, mainly before midnight. Mostly cloudy, with a low around 42.

Thursday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 58.

Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 41.

Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 51.

Friday Night: A chance of showers. Mostly cloudy, with a low around 40.

Saturday: A chance of showers. Partly sunny, with a high near 53.

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Current U.S. National Radar--Current

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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 Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle