Forecast Details for Portland, OR

Recent Locations: Hialeah, FL Worcester, MA Portland, OR

Overnight: Rain likely. Snow level 2000 feet. Cloudy, with a steady temperature around 43. Northwest wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday: Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after noon. Snow level 1900 feet. High near 52. West southwest wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Snow level 1700 feet. Low around 37. South southwest wind 3 to 8 mph. Chance of precipitation is 80%.

Thursday: A 20 percent chance of showers after 11am. Snow level 1800 feet rising to 3100 feet in the afternoon. Partly sunny, with a high near 56. South southwest wind 3 to 6 mph.

Thursday Night: Partly cloudy, with a low around 40. West wind around 6 mph becoming calm in the evening.

Friday: Partly sunny, with a high near 61.

Friday Night: Mostly cloudy, with a low around 42.

Saturday: A slight chance of rain after 11am. Partly sunny, with a high near 68.

Saturday Night: A chance of rain. Mostly cloudy, with a low around 49.

Sunday: A chance of rain. Mostly cloudy, with a high near 68.

Sunday Night: A chance of rain. Mostly cloudy, with a low around 49.

Monday: A chance of rain. Partly sunny, with a high near 72.

Monday Night: A chance of rain. Partly cloudy, with a low around 48.

Tuesday: A chance of rain. Partly sunny, with a high near 70.

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Current U.S. National Radar--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 are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds

Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds