Forecast Details for Eugene, OR

Recent Locations: Manning, IA Joliet, IL Eugene, OR

Current Alerts for Eugene, OR: Freeze Watch Winter Storm Warning

Overnight: Showers and possibly a thunderstorm. Snow level 2200 feet. Low around 39. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Showers and thunderstorms before 2pm, then a slight chance of showers between 2pm and 3pm. Snow level 2400 feet rising to 3500 feet in the afternoon. High near 54. Southwest wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Patchy fog after 3am. Patchy frost after 2am. Otherwise, mostly clear, with a low around 33. Light and variable wind.

Friday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 62. Calm wind becoming north around 6 mph in the afternoon.

Friday Night: Clear, with a low around 37. North wind around 6 mph becoming calm in the evening.

Saturday: Sunny, with a high near 69.

Saturday Night: Partly cloudy, with a low around 43.

Sunday: Partly sunny, with a high near 74.

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

Monday: Mostly sunny, with a high near 74.

Monday Night: Partly cloudy, with a low around 45.

Tuesday: A slight chance of rain. Partly sunny, with a high near 63.

Tuesday Night: A slight chance of rain. Mostly cloudy, with a low around 42.

Wednesday: A slight 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

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North America Water Vapor (Moisture)

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet