Forecast Details for Fort Thompson, SD

Recent Locations: Grapeview, WA Phillips, WI Fort Thompson, SD

This Afternoon: Snow likely, mainly between 4pm and 5pm. Cloudy, with a high near 35. East northeast wind around 5 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than one inch possible.

Tonight: Snow. Low around 27. North wind 9 to 16 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Saturday: Snow likely, mainly before 7am. Patchy blowing snow before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 40. Breezy, with a northwest wind 18 to 23 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday Night: Partly cloudy, with a low around 26. West wind 6 to 14 mph.

Sunday: Sunny, with a high near 52. Northwest wind 7 to 15 mph, with gusts as high as 23 mph.

Sunday Night: Mostly cloudy, with a low around 25. North wind 6 to 13 mph.

Monday: A slight chance of snow before 1pm. Mostly cloudy, with a high near 39. Northeast wind 7 to 14 mph. Chance of precipitation is 20%.

Monday Night: Mostly cloudy, with a low around 21. East southeast wind 11 to 15 mph.

Tuesday: Mostly cloudy, with a high near 51. Breezy, with a south southeast wind 17 to 26 mph.

Tuesday Night: Partly cloudy, with a low around 36. Breezy.

Wednesday: Mostly sunny, with a high near 63. Breezy.

Wednesday Night: A chance of rain and snow. Mostly cloudy, with a low around 28. Blustery. Chance of precipitation is 30%.

Thursday: A chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.

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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 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