Forecast Details for Clackamas, OR

Recent Locations: Ariel, WA Fairfield, VA Clackamas, OR

Current Alerts for Clackamas, OR: Freeze Warning

Tonight: Showers likely and possibly a thunderstorm before 4am, then a chance of showers. Snow level 1500 feet. Mostly cloudy, with a low around 37. South southwest wind around 6 mph. Chance of precipitation is 60%.

Thursday: A 20 percent chance of showers between 3pm and 4pm. Snow level 1700 feet rising to 3300 feet in the afternoon. Partly sunny, with a high near 57. Southwest wind around 6 mph.

Thursday Night: Partly cloudy, with a low around 39. West southwest wind around 6 mph becoming calm in the evening.

Friday: Mostly sunny, with a high near 62. Calm wind becoming north around 5 mph in the afternoon.

Friday Night: Mostly cloudy, with a low around 42. North wind around 5 mph becoming calm in the evening.

Saturday: Partly sunny, with a high near 69.

Saturday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 50.

Sunday: A chance of rain. Mostly cloudy, with a high near 69.

Sunday Night: A chance of rain before 11pm. Mostly cloudy, with a low around 49.

Monday: A slight chance of rain after 11am. Partly sunny, with a high near 71.

Monday Night: A chance of rain. Mostly cloudy, with a low around 50.

Tuesday: A chance of rain. Mostly cloudy, with a high near 65.

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

Wednesday: A chance of rain. Mostly cloudy, 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

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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds