Forecast Details for Marshalltown, IA

Recent Locations: Harleyville, SC Marshalltown, IA

Overnight: Mostly cloudy, with a low around 47. Windy, with a northwest wind 14 to 21 mph, with gusts as high as 29 mph.

Tuesday: Mostly sunny, with a high near 64. Breezy, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 28 mph.

Tuesday Night: Partly cloudy, with a low around 42. North wind around 6 mph becoming light and variable.

Wednesday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers likely after 4pm. Increasing clouds, with a high near 62. East southeast wind 7 to 11 mph, with gusts 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.

Wednesday Night: Showers, with thunderstorms also possible after 7pm. Low around 51. East southeast wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 44.

Friday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 64.

Friday Night: Mostly clear, with a low around 39.

Saturday: Sunny, with a high near 69.

Saturday Night: Clear, with a low around 46.

Sunday: Sunny, with a high near 75.

Sunday Night: Mostly clear, with a low around 52.

Monday: Sunny, with a high near 77.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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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

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds