Forecast Details for Calpella, CA

Recent Locations: Ludlow, MA Susanville, CA Calpella, CA

Today: Showers. High near 57. South wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

Tonight: Showers, mainly before 8pm. Low around 39. West southwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: Sunny, with a high near 63. Light west northwest wind becoming northwest 5 to 10 mph in the afternoon.

Thursday Night: Patchy fog after 5am. Widespread frost, mainly after 5am. Otherwise, clear, with a low around 34. Northwest wind 5 to 10 mph becoming light north in the evening.

Friday: Patchy fog before 8am. Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 79. Calm wind.

Friday Night: Mostly clear, with a low around 41. West northwest wind around 5 mph becoming calm in the evening.

Saturday: Sunny, with a high near 82.

Saturday Night: Mostly clear, with a low around 45.

Sunday: Sunny, with a high near 83.

Sunday Night: Partly cloudy, with a low around 46.

Monday: Sunny, with a high near 79.

Monday Night: Patchy fog. Otherwise, partly cloudy, with a low around 44.

Tuesday: A slight chance of rain. Patchy fog. Otherwise, mostly sunny, with a high near 73.

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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)

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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