Forecast Details for Portland, OR

Recent Locations: Riverside, CA Long Beach, CA Portland, OR

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. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

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

Sunday Night: Rain, mainly before 10pm. Low around 42. Chance of precipitation is 80%.

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, mainly before 4pm. 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.

Wednesday Night: A slight chance of rain. Mostly cloudy, with a low around 37.

Thursday: A chance of rain. Mostly cloudy, with a high near 51.

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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 is Drizzle?

Home - Education - Precipitation - Drizzle

Drizzle Next Topic: Evaporation

Drizzle is precipitation in the form of water droplets which are smaller than raindrops.

Drizzle is characterized by fine, gently falling droplets and typically does not impact human habitation in a negative way. The exception to this is freezing drizzle, a condition where drizzle freezes immediately upon reaching earth's surface. Freezing drizzle is still less dangerous than freezing rain, but can potentially result in hazardous road conditions.

Next Topic: Evaporation

Weather Topic: What is Fog?

Home - Education - Cloud Types - Fog

Fog Next Topic: Fractus Clouds

Fog is technically a type of stratus cloud, which lies along the ground and obscures visibility.

It is usually created when humidity in the air condenses into tiny water droplets. Because of this, some places are more prone to foggy weather, such as regions close to a body of water.

Fog is similar to mist; both are the appearance of water droplets suspended in the air, but fog is the term applied to the condition when visibility is less than 1 km.

Next Topic: Fractus Clouds