Forecast Details for Walnut, IA

Recent Locations: Sutter, CA Nettleton, MS Walnut, IA

Overnight: Rain and possibly a thunderstorm. Steady temperature around 44. East wind around 16 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Rain and thunderstorms before 2pm, then a slight chance of rain between 2pm and 4pm. High near 55. Breezy, with an east wind 13 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night: Mostly cloudy, with a low around 35. West northwest wind 6 to 14 mph becoming east after midnight.

Friday: A chance of rain and thunderstorms before 10am, then rain between 10am and 1pm, then rain and possibly a thunderstorm after 1pm. High near 58. Breezy, with an east wind 15 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 30. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday: Mostly cloudy, with a high near 46. Windy, with a west northwest wind 18 to 25 mph, with gusts as high as 32 mph.

Saturday Night: Partly cloudy, with a low around 26. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 26 mph.

Sunday: Sunny, with a high near 58. West northwest wind 7 to 11 mph, with gusts as high as 17 mph.

Sunday Night: Mostly clear, with a low around 32. Northwest wind 7 to 9 mph.

Monday: A slight chance of rain. Mostly cloudy, with a high near 52. North wind 7 to 13 mph.

Monday Night: A chance of rain and snow. Mostly cloudy, with a low around 27. North northeast wind 11 to 13 mph, with gusts as high as 18 mph.

Tuesday: A slight chance of rain. Partly sunny, with a high near 53. Breezy, with a southeast wind 15 to 22 mph, with gusts as high as 28 mph.

Tuesday Night: A slight chance of rain. Mostly cloudy, with a low around 39. Breezy, with a south southeast wind around 21 mph, with gusts as high as 26 mph.

Wednesday: A chance of rain. Partly sunny, with a high near 71. Windy, with a south wind 20 to 29 mph.

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North America Water Vapor (Moisture)

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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