Forecast Details for Portland, OR

Recent Locations: Lincoln, NE Towaco, NJ Portland, OR

Today: Mostly sunny, with a high near 60. East wind around 7 mph.

Tonight: Mostly clear, with a low around 39. East wind around 5 mph becoming calm in the evening.

Friday: Sunny, with a high near 59. Light south wind.

Friday Night: Partly cloudy, with a low around 43. Calm wind.

Saturday: Rain, mainly after 4pm. High near 56. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Night: Rain. Low around 49. Chance of precipitation is 80%.

Sunday: Rain. High near 53. Chance of precipitation is 90%.

Sunday Night: Rain, mainly before 10pm. Mostly cloudy, with a low around 42.

Monday: Rain likely, mainly after 10am. Mostly cloudy, with a high near 52.

Monday Night: A chance of rain. Mostly cloudy, with a low around 40.

Tuesday: A chance of rain. Mostly cloudy, with a high near 50.

Tuesday Night: A slight chance of rain. Mostly cloudy, with a low around 36.

Wednesday: A slight chance of rain. Partly sunny, with a high near 52.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

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 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

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation