Forecast Details for Decorah, IA

Recent Locations: Decorah, IA  
Tonight: Showers and thunderstorms, mainly before midnight. Low around 47. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday: Increasing clouds, with a high near 69. Breezy, with a west wind 11 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 49. North wind 5 to 10 mph becoming east after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday: Showers and possibly a thunderstorm. High near 66. Breezy, with an east wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 47. South wind 10 to 13 mph becoming west after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Sunny, with a high near 68. West wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Friday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 46. West wind 6 to 9 mph becoming east in the evening.
Saturday: A 40 percent chance of showers. Partly sunny, with a high near 64. East wind 8 to 13 mph becoming west in the afternoon.
Saturday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 43. Northwest wind 7 to 13 mph.
Sunday: Sunny, with a high near 71. Northwest wind 8 to 10 mph becoming southeast in the afternoon.
Sunday Night: A 20 percent chance of showers. Mostly clear, with a low around 48. Southwest wind around 11 mph becoming southeast after midnight.
Monday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. South wind 13 to 15 mph, with gusts as high as 23 mph.
Monday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 54. Breezy, with a south wind 14 to 16 mph. Chance of precipitation is 60%.
Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 71. Breezy, with a south wind 15 to 18 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

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Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

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