Forecast Details for Boulder, WY

Recent Locations: New Lexington, OH League City, TX Boulder, WY

Tonight: Widespread haze after 5am. Mostly clear, with a low around 44. Northwest wind 6 to 10 mph becoming northeast in the evening.

Saturday: Widespread haze before 3pm. Areas of smoke between 7am and 2pm. Sunny, with a high near 83. Light and variable wind becoming north 5 to 10 mph in the afternoon.

Saturday Night: Widespread haze between 2am and 4am. Areas of smoke after 4am. Partly cloudy, with a low around 46. West northwest wind 5 to 8 mph becoming east northeast in the evening.

Sunday: Scattered showers and thunderstorms after noon. Areas of smoke before 7am. Partly sunny, with a high near 80. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%.

Sunday Night: Scattered showers and thunderstorms before midnight, then isolated showers. Mostly cloudy, with a low around 46. South wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 30%.

Monday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 74. Calm wind becoming west northwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.

Monday Night: Scattered showers and thunderstorms before midnight, then isolated showers. Mostly cloudy, with a low around 44. Northeast wind 3 to 7 mph. Chance of precipitation is 40%.

Tuesday: Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 75. Chance of precipitation is 50%.

Tuesday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 45. Chance of precipitation is 40%.

Wednesday: Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.

Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 44.

Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69.

Thursday Night: Scattered showers and thunderstorms. Partly cloudy, with a low around 41.

Friday: Scattered showers and thunderstorms. Mostly sunny, with a high near 71.

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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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

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