Forecast Details for Walnut, IA

Recent Locations: Doss, TX Taylor, AR Walnut, IA

Today: Sunny, with a high near 81. South southwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 24 mph.

Tonight: Increasing clouds, with a low around 56. Breezy, with a south wind 13 to 18 mph, with gusts as high as 25 mph.

Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 75. Breezy, with a south wind 18 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night: A chance of rain showers before 4am, then a slight chance of rain and snow showers. Partly cloudy, with a low around 33. Breezy, with a north northwest wind 18 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Saturday: A 10 percent chance of snow showers before 7am. Sunny, with a high near 52. Breezy, with a northwest wind 15 to 22 mph, with gusts as high as 29 mph.

Saturday Night: Mostly clear, with a low around 31. Northwest wind 5 to 15 mph, with gusts as high as 22 mph.

Sunday: Sunny, with a high near 64. West northwest wind 6 to 10 mph, with gusts as high as 17 mph.

Sunday Night: Mostly clear, with a low around 39. East southeast wind 7 to 11 mph, with gusts as high as 17 mph.

Monday: Sunny, with a high near 72. Breezy, with a south wind 13 to 21 mph, with gusts as high as 28 mph.

Monday Night: Partly cloudy, with a low around 49. Breezy, with a south wind 15 to 18 mph, with gusts as high as 24 mph.

Tuesday: Sunny, with a high near 75. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.

Tuesday Night: Mostly clear, with a low around 49. South wind 11 to 14 mph, with gusts as high as 20 mph.

Wednesday: A slight chance of showers. Mostly sunny, with a high near 74. Breezy, with a south southeast wind 11 to 20 mph, with gusts as high as 25 mph.

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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

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle