Forecast Details for Groton, SD

Recent Locations: Delphia, KY Hackberry, AZ Groton, SD

Tonight: Rain and snow, mainly before 3am. Low around 30. East wind 15 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.

Thursday: Snow, mainly before 3pm. High near 35. East northeast wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Thursday Night: A slight chance of snow before 1am, then snow and freezing rain likely between 1am and 4am, then snow and freezing rain likely, possibly mixed with sleet after 4am. Cloudy, with a low around 26. Northeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible.

Friday: Snow and freezing rain, possibly mixed with sleet before 10am, then snow, possibly mixed with sleet between 10am and 1pm, then snow after 1pm. High near 33. Northeast wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of 2 to 4 inches possible.

Friday Night: Snow. Low around 27. North northeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Saturday: Snow likely, mainly before 1pm. Patchy blowing snow before 4pm. Mostly cloudy, with a high near 35. Breezy, with a northwest wind 17 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Saturday Night: Patchy blowing snow between 7pm and 8pm. Mostly clear, with a low around 17. West wind 7 to 15 mph, with gusts as high as 23 mph.

Sunday: Mostly sunny, with a high near 39. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

Sunday Night: Partly cloudy, with a low around 23. North northwest wind around 9 mph.

Monday: Mostly cloudy, with a high near 35.

Monday Night: Mostly cloudy, with a low around 15.

Tuesday: Partly sunny, with a high near 40.

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

Wednesday: A slight chance of rain and snow. Partly sunny, with a high near 52. Breezy. Chance of precipitation is 20%.

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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