Forecast Details for Tualatin, OR

Recent Locations: Gray, ME Upsala, MN Tualatin, OR

Current Alerts for Tualatin, OR: Frost Advisory Winter Storm Warning

Today: Rain likely and possibly a thunderstorm, then showers and possibly a thunderstorm after noon. Snow level 1900 feet. High near 53. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Patchy frost after 4am. Snow level 1700 feet. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 36. West southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday: A 30 percent chance of showers after 11am. Snow level 1800 feet rising to 3100 feet in the afternoon. Partly sunny, with a high near 57. Calm wind becoming southwest around 6 mph in the afternoon.

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

Friday: Partly sunny, with a high near 61. Light and variable wind.

Friday Night: Mostly cloudy, with a low around 41.

Saturday: A 20 percent chance of rain after 11am. Partly sunny, with a high near 69.

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

Sunday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 69.

Sunday Night: A chance of rain, mainly before 11pm. 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.

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North America Water Vapor (Moisture)

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Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds