Forecast Details for Sisters, OR

Recent Locations: Tupelo, OK Greeley, IA Sisters, OR

Tonight: A 30 percent chance of rain, mainly before 1am. Areas of fog. Otherwise, cloudy, with a low around 28. Calm wind.

Sunday: A 30 percent chance of rain, mainly between 1pm and 4pm. Areas of fog before 10am. Snow level 3900 feet rising to 5200 feet in the afternoon. Otherwise, mostly cloudy, with a high near 45. Calm wind.

Sunday Night: A chance of rain before 4am, then snow, possibly mixed with rain. Low around 28. Calm wind. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Washington's Birthday: Rain and snow, becoming all snow after 1pm. Snow level 3700 feet lowering to 3200 feet in the afternoon . High near 38. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Monday Night: Snow likely, mainly after 4am. Mostly cloudy, with a low around 19. Calm wind. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Tuesday: Snow. High near 35. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 17. New snow accumulation of less than a half inch possible.

Wednesday: Snow likely, mainly after 10am. Partly sunny, with a high near 33. Chance of precipitation is 70%.

Wednesday Night: Snow likely. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.

Thursday: Snow likely. Partly sunny, with a high near 33.

Thursday Night: Snow likely. Mostly cloudy, with a low around 19.

Friday: Snow likely. Mostly cloudy, with a high near 36.

Friday Night: Snow likely. Mostly cloudy, with a low around 22.

Saturday: Snow likely. Mostly cloudy, with a high near 40.

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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 Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain