Forecast Details for Eugene, OR

Recent Locations: Eugene, OR

Overnight: Mostly cloudy, with a low around 44. Calm wind.

Monday: Partly sunny, with a high near 64. Calm wind becoming north northwest around 6 mph in the afternoon.

Monday Night: Partly cloudy, with a low around 46. North wind around 5 mph becoming calm in the evening.

Tuesday: A 30 percent chance of rain before 11am. Mostly cloudy, with a high near 64. Light southwest wind.

Tuesday Night: Mostly cloudy, with a low around 48. Northwest wind around 5 mph becoming calm in the evening.

Wednesday: Partly sunny, then gradually becoming sunny, with a high near 69.

Wednesday Night: Clear, with a low around 44.

Thursday: Sunny, with a high near 78.

Thursday Night: A slight chance of rain after 11pm. Increasing clouds, with a low around 45.

Friday: Rain likely, mainly after 11am. Partly sunny, with a high near 65.

Friday Night: Rain. Mostly cloudy, with a low around 43.

Saturday: Rain likely. Mostly cloudy, with a high near 58.

Saturday Night: A chance of rain. Partly cloudy, with a low around 39.

Sunday: A chance of rain. Mostly sunny, with a high near 61.

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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 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