Forecast Details for Denison, IA

Recent Locations: Denison, IA

Tonight: A 10 percent chance of snow showers after 5am. Increasing clouds, with a low around 32. North wind 6 to 9 mph.

Monday: A chance of rain and snow showers before 3pm, then a chance of snow showers between 3pm and 5pm, then a slight chance of rain showers after 5pm. Cloudy, with a high near 43. North northeast wind 6 to 10 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

Monday Night: A slight chance of snow showers before 8pm, then a slight chance of rain showers between 8pm and 9pm, then a chance of snow showers after 9pm. Cloudy, with a low around 24. North northeast wind around 7 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

Tuesday: A chance of snow showers before 1pm, then rain likely, possibly mixed with snow showers. Cloudy, with a high near 40. East southeast wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Tuesday Night: A chance of rain and snow showers before 7pm, then a chance of rain showers. Mostly cloudy, with a low around 32. Breezy, with a southeast wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 66. Windy. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 37.

Thursday: A 50 percent chance of showers. Mostly sunny, with a high near 58.

Thursday Night: A 50 percent chance of showers. Partly cloudy, with a low around 35.

Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 58.

Friday Night: Showers likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

Saturday: Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

Saturday Night: Showers likely. Cloudy, with a low around 52. Chance of precipitation is 70%.

Sunday: Showers likely. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.

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 Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle