Forecast Details for Herreid, SD

Recent Locations: Cosby, MO Tropic, UT Herreid, SD

Current Alerts for Herreid, SD: Red Flag Warning

This Afternoon: Partly sunny and hot, with a high near 92. Breezy, with a south wind 21 to 23 mph.

Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 50. South southwest wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

Thursday: A chance of showers, mainly between 2pm and 4pm. Mostly sunny, with a high near 65. Windy, with a west wind 11 to 21 mph increasing to 22 to 32 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 40%.

Thursday Night: Partly cloudy, with a low around 32. Windy, with a west northwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph.

Friday: Partly sunny, with a high near 53. West wind 14 to 18 mph, with gusts as high as 26 mph.

Friday Night: A slight chance of rain showers between 1am and 4am, then a slight chance of snow showers after 4am. Mostly cloudy, with a low around 31. West wind 7 to 14 mph. Chance of precipitation is 20%.

Saturday: A slight chance of snow showers before 7am, then a chance of rain and snow showers between 7am and 1pm, then a slight chance of rain showers after 1pm. Partly sunny, with a high near 52. West wind 8 to 15 mph. Chance of precipitation is 30%.

Saturday Night: A chance of rain showers before 4am, then a chance of rain and snow showers. Mostly cloudy, with a low around 33. West northwest wind 6 to 14 mph becoming northeast after midnight. Chance of precipitation is 30%.

Sunday: A chance of rain and snow showers before 10am, then rain showers likely. Mostly cloudy, with a high near 51. Northeast wind 7 to 15 mph. Chance of precipitation is 60%.

Sunday Night: Rain showers likely before 4am, then rain and snow showers likely. Cloudy, with a low around 35. Chance of precipitation is 60%.

Monday: Rain and snow showers likely. Mostly cloudy, with a high near 51. Breezy. Chance of precipitation is 60%.

Monday Night: A slight chance of rain and snow showers. Mostly cloudy, with a low around 30. Blustery. Chance of precipitation is 20%.

Tuesday: A slight chance of rain and snow showers. Partly sunny, with a high near 53. Chance of precipitation is 20%.

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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