Forecast Details for Truckee, CA

Recent Locations: Sugar Grove, IL Tionesta, PA Truckee, CA

Overnight: Patchy freezing fog. Mostly cloudy, with a low around 33. Calm wind.

Saturday: A slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Patchy freezing fog before 9am. Partly sunny, with a high near 59. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 20%.

Saturday Night: A 10 percent chance of showers after 4am. Mostly cloudy, with a low around 36. Southwest wind around 5 mph becoming calm in the evening.

Sunday: A 30 percent chance of showers, mainly after 10am. Snow level 8100 feet. Partly sunny, with a high near 50. Calm wind becoming southwest around 5 mph in the afternoon.

Sunday Night: A chance of rain showers before 10pm, then a chance of rain and snow showers between 10pm and 4am, then a slight chance of snow showers after 4am. Snow level 6900 feet lowering to 6100 feet after midnight . Mostly cloudy, with a low around 25. Southwest wind around 5 mph becoming calm. Chance of precipitation is 40%. Little or no snow accumulation expected.

Monday: A slight chance of snow showers before 7am, then a chance of rain and snow showers between 7am and 1pm, then a chance of rain showers after 1pm. Snow level 5900 feet rising to 6600 feet in the afternoon. Mostly sunny, with a high near 47. Calm wind. Chance of precipitation is 30%. Little or no snow accumulation expected.

Monday Night: Mostly clear, with a low around 23.

Tuesday: Sunny, with a high near 55.

Tuesday Night: Increasing clouds, with a low around 27.

Wednesday: A chance of rain showers after 10am, mixing with snow after 1pm. Snow level 6400 feet. Partly sunny, with a high near 49.

Wednesday Night: A chance of rain and snow showers. Partly cloudy, with a low around 20.

Thursday: Sunny, with a high near 46.

Thursday Night: Mostly clear, with a low around 21.

Friday: Sunny, with a high near 48.

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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