Forecast Details for Winston, OR

Recent Locations: Winston, OR

Current Alerts for Winston, OR: Air Quality Alert

Overnight: Isolated showers and thunderstorms. Mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 20%.

Saturday: Isolated showers and thunderstorms before 2pm, then isolated showers between 2pm and 5pm, then isolated showers and thunderstorms after 5pm. Areas of smoke after 1pm. Partly sunny, with a high near 85. Calm wind becoming north northwest around 6 mph in the afternoon. Chance of precipitation is 20%.

Saturday Night: Isolated showers and thunderstorms before 8pm, then isolated showers between 8pm and 11pm. Areas of smoke before 8pm. Mostly cloudy, with a low around 55. West wind 5 to 9 mph becoming light and variable in the evening. Chance of precipitation is 20%.

Sunday: Partly sunny, with a high near 84. Calm wind becoming west northwest around 5 mph in the afternoon.

Sunday Night: Isolated showers after 11pm. Mostly cloudy, with a low around 58. West northwest wind 5 to 10 mph becoming light northwest in the evening. Chance of precipitation is 20%.

Monday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 71. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 56. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday: Showers likely, then showers and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 76.

Tuesday Night: A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 57.

Wednesday: A chance of showers. Mostly cloudy, with a high near 78.

Wednesday Night: A chance of showers. Partly cloudy, with a low around 55.

Thursday: A slight chance of showers. Mostly sunny, with a high near 81.

Thursday Night: Mostly clear, with a low around 56.

Friday: Sunny, with a high near 86.

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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 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

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow