Forecast Details for Walnut, IA

Recent Locations: Chicago Botanical Gardens, IL Dalbo, MN Walnut, IA

Today: A slight chance of showers before noon, then a chance of rain between noon and 3pm, then showers likely after 3pm. Mostly cloudy, with a high near 48. Breezy, with an east wind 13 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Tonight: Showers and possibly a thunderstorm before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Steady temperature around 44. Breezy, with an east wind 15 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then a chance of rain after 1pm. High near 60. Breezy, with a southeast wind 14 to 20 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night: Partly cloudy, with a low around 37. West northwest wind 6 to 14 mph becoming east northeast after midnight. Winds could gust as high as 20 mph.

Friday: Rain and possibly a thunderstorm. High near 61. Breezy, with an east wind 14 to 18 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: A 40 percent chance of rain before 1am. Mostly cloudy, with a low around 30. Northwest wind 14 to 17 mph, with gusts as high as 23 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday: Mostly cloudy, with a high near 45. Windy, with a west northwest wind 18 to 25 mph, with gusts as high as 33 mph.

Saturday Night: Partly cloudy, with a low around 26. Blustery, with a northwest wind 16 to 24 mph, with gusts as high as 29 mph.

Sunday: Sunny, with a high near 54. Northwest wind 13 to 15 mph.

Sunday Night: Mostly clear, with a low around 34. Northwest wind 7 to 9 mph becoming south southeast in the evening.

Monday: Mostly sunny, with a high near 63. South wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

Monday Night: A slight chance of rain. Partly cloudy, with a low around 30. North northeast wind 10 to 13 mph, with gusts as high as 18 mph.

Tuesday: Mostly sunny, with a high near 55. North northeast wind 10 to 15 mph becoming east southeast in the afternoon. Winds could gust as high as 20 mph.

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North America Water Vapor (Moisture)

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Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds