Forecast Details for Sisters, OR

Recent Locations: Dryfork, WV Jackson, MS Sisters, OR

Today: Rain likely before 10am, then rain, possibly mixed with snow. Snow level 4300 feet. High near 39. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

Tonight: Rain likely before 1am, then a slight chance of rain and snow after 4am. Snow level 4400 feet lowering to 3700 feet after midnight . Cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. Little or no snow accumulation expected.

Sunday: A slight chance of rain and snow before 7am, then a chance of rain. Snow level 3800 feet rising to 4900 feet in the afternoon. Mostly cloudy, with a high near 45. Calm wind. Chance of precipitation is 40%.

Sunday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 28. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

Washington's Birthday: Rain and snow, becoming all snow after 1pm. Snow level 3300 feet. High near 39. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Monday Night: Snow likely, mainly before 10pm. Mostly cloudy, with a low around 19. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Tuesday: Snow likely. Mostly cloudy, with a high near 35. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Tuesday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 17.

Wednesday: Snow likely, mainly after 10am. Partly sunny, with a high near 34. Chance of precipitation is 60%.

Wednesday Night: A chance of snow. Mostly cloudy, with a low around 19.

Thursday: Snow likely. Mostly cloudy, with a high near 35.

Thursday Night: Snow likely. Mostly cloudy, with a low around 21.

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

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

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 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