Forecast Details for Dennison, MN

Recent Locations: Grannis, AR Royston, GA Dennison, MN

Current Alerts for Dennison, MN: Dense Fog Advisory

Today: Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming south around 5 mph in the morning.

Tonight: Patchy fog between 3am and 5am. Otherwise, partly cloudy, with a low around 34. South wind around 5 mph becoming calm.

Thursday: Partly sunny, with a high near 54. Light east wind becoming southeast 5 to 10 mph in the morning.

Thursday Night: Showers likely and possibly a thunderstorm, mainly after 3am. Mostly cloudy, with a low around 43. Southeast wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Showers. High near 57. Southeast wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night: Rain and snow showers likely before 1am, then a chance of rain showers between 1am and 5am, then a chance of snow showers after 5am. Some thunder is also possible. Mostly cloudy, with a low around 30. West northwest wind 10 to 15 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Saturday: Sunny, with a high near 47. West northwest wind around 10 mph.

Saturday Night: Partly cloudy, with a low around 37. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 25 mph.

Sunday: Mostly sunny, with a high near 60. West southwest wind around 15 mph.

Sunday Night: Partly cloudy, with a low around 40. South southwest wind 10 to 15 mph.

Monday: Sunny, with a high near 65. West southwest wind around 15 mph.

Monday Night: Partly cloudy, with a low around 39. West wind around 10 mph becoming south southeast in the evening.

Tuesday: A 30 percent chance of showers. Mostly cloudy, with a high near 52. South wind 10 to 15 mph becoming north northwest in the afternoon.

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 are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain