Forecast Details for Knoxville, IA

Recent Locations: Hegins, PA Morristown, IN Knoxville, IA

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Steady temperature around 44. East wind around 15 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 thunderstorms before 4pm, then a chance of showers. High near 72. Windy, with a southeast wind 14 to 21 mph becoming west southwest in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night: Partly cloudy, with a low around 39. Breezy, with a west wind 6 to 16 mph becoming northeast after midnight. Winds could gust as high as 26 mph.

Friday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 69. East wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 37. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: Partly sunny, with a high near 48. Windy.

Saturday Night: Partly cloudy, with a low around 32. Breezy.

Sunday: Sunny, with a high near 55.

Sunday Night: Mostly clear, with a low around 36.

Monday: Partly sunny, with a high near 56.

Monday Night: Mostly cloudy, with a low around 31.

Tuesday: Mostly sunny, with a high near 52.

Tuesday Night: Mostly cloudy, with a low around 38.

Wednesday: Partly sunny, with a high near 65. Breezy.

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North America Water Vapor (Moisture)

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Weather Topic: What is Hail?

Home - Education - Precipitation - Hail

Hail Next Topic: Hole Punch Clouds

Hail is a form of precipitation which is recognized by large solid balls or clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind. As the hailstones remain in the updraft, ice is deposited onto them until their weight becomes heavy enough for them to fall to the earth's surface.

Hail storms can cause significant damage to crops, aircrafts, and man-made structures, despite the fact that the duration is usually less than ten minutes.

Next Topic: Hole Punch Clouds

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