Forecast Details for Gresham, OR

Recent Locations: Morenci, MI Turners Falls, MA Gresham, OR

Tonight: Rain, mainly before 5am. Low around 44. South wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday: Rain, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 53. Breezy, with a south southeast wind 10 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night: Rain and possibly a thunderstorm before 1am, then rain likely. Snow level 3000 feet lowering to 2000 feet after midnight . Low around 40. Breezy, with a south southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Rain likely. Snow level 2000 feet rising to 3100 feet in the afternoon. Mostly cloudy, with a high near 54. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

Thursday Night: A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 38. West wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

Friday: Sunny, with a high near 61.

Friday Night: Clear, with a low around 40.

Saturday: Sunny, with a high near 68.

Saturday Night: Mostly clear, with a low around 45.

Sunday: Mostly sunny, with a high near 71.

Sunday Night: Partly cloudy, with a low around 48.

Monday: Partly sunny, with a high near 71.

Monday Night: Mostly cloudy, with a low around 49.

Tuesday: A chance of rain. Partly sunny, with a high near 62.

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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

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North America Water Vapor (Moisture)

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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

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds