Forecast Details for Decorah, IA

Recent Locations: Chester, SC Union, SC Decorah, IA

Today: Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 45. East wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Tonight: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 32. West wind 6 to 10 mph.

Friday: Showers and possibly a thunderstorm after 1pm. High near 51. Calm wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 38. East wind around 10 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 45. Breezy, with a west wind 10 to 17 mph, with gusts as high as 26 mph.

Saturday Night: Mostly cloudy, with a low around 30. Breezy, with a west wind 13 to 16 mph, with gusts as high as 24 mph.

Sunday: Mostly sunny, with a high near 51. Northwest wind around 10 mph.

Sunday Night: Partly cloudy, with a low around 33. Northwest wind 6 to 8 mph.

Monday: Mostly sunny, with a high near 49. Northwest wind 7 to 13 mph.

Monday Night: Partly cloudy, with a low around 26. North wind 6 to 10 mph.

Tuesday: Mostly sunny, with a high near 48. Northeast wind 6 to 11 mph becoming southeast in the afternoon.

Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 35. Southeast wind 7 to 15 mph.

Wednesday: A 30 percent chance of showers. Partly sunny, with a high near 63. Breezy, with a south wind 10 to 20 mph, with gusts as high as 28 mph.

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation