Forecast Details for Portland, OR

Recent Locations: Norfolk, VA Riverside, CA 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.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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 Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds