Forecast Details for Jefferson, SD

Recent Locations: Tatum, TX Diamond, MO Jefferson, SD

This Afternoon: Sunny, with a high near 87. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 25 mph.

Tonight: Increasing clouds, with a low around 55. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.

Friday: A 30 percent chance of showers between 11am and 1pm. Partly sunny, with a temperature falling to around 52 by noon. Windy, with a south wind 15 to 20 mph becoming north northwest 25 to 30 mph in the morning. Winds could gust as high as 40 mph.

Friday Night: Partly cloudy, with a low around 29. Blustery, with a north northwest wind 15 to 25 mph, with gusts as high as 35 mph.

Saturday: Sunny, with a high near 55. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

Saturday Night: Mostly clear, with a low around 29. Blustery, with a northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

Sunday: Sunny, with a high near 64.

Sunday Night: Mostly clear, with a low around 37.

Monday: Sunny, with a high near 78.

Monday Night: Partly cloudy, with a low around 49.

Tuesday: Sunny, with a high near 82.

Tuesday Night: Mostly clear, with a low around 49.

Wednesday: Mostly sunny, with a high near 82. Breezy.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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 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