Forecast Details for Sumpter, OR

Recent Locations: New City, NY Union City, TN Sumpter, OR

This Afternoon: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 76. Calm wind. Chance of precipitation is 30%.

Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 30%.

Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 11am. Partly sunny, with a high near 70. Calm wind. Chance of precipitation is 60%.

Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 50%.

Wednesday: A chance of showers, then showers and possibly a thunderstorm after 11am. High near 63. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 64. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: A 30 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 43.

Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 66. Chance of precipitation is 40%.

Friday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 44.

Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 70.

Saturday Night: A 30 percent chance of showers. Partly cloudy, with a low around 47.

Sunday: A 50 percent chance of showers. Partly sunny, with a high near 66.

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Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds