Forecast Details for Dennison, MN

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Current Alerts for Dennison, MN: Winter Weather Advisory
Washington's Birthday: Snow likely, possibly mixed with rain and freezing rain before 1pm, then snow. High near 33. South southeast wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 80%. Little or no ice accumulation expected. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight: A 20 percent chance of snow before 8pm. Cloudy, with a low around 9. Northwest wind 10 to 15 mph.
Tuesday: Partly sunny, with a high near 17. West northwest wind 10 to 15 mph.
Tuesday Night: Partly cloudy, with a low around -5. Wind chill values as low as -14. Northwest wind 5 to 10 mph.
Wednesday: Sunny, with a high near 8. Northwest wind 5 to 10 mph.
Wednesday Night: Mostly clear, with a low around -12. West northwest wind around 5 mph.
Thursday: Sunny, with a high near 14. West southwest wind 5 to 10 mph.
Thursday Night: Mostly clear, with a temperature rising to around 14 by 5am. Southwest wind 5 to 15 mph.
Friday: Sunny, with a high near 33. Southwest wind around 15 mph, with gusts as high as 30 mph.
Friday Night: Partly cloudy, with a low around 22. South southwest wind 10 to 15 mph.
Saturday: Sunny, with a high near 37. West southwest wind around 10 mph.
Saturday Night: Mostly clear, with a low around 19. West wind 5 to 10 mph.
Sunday: Mostly sunny, with a high near 37. West southwest wind around 5 mph.

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Current U.S. National Radar--Current

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Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

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

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