Forecast Details for Sioux Falls, SD

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Overnight: A slight chance of snow showers before 4am, then a chance of freezing rain. Cloudy, with a low around 31. East northeast wind around 5 mph. Chance of precipitation is 30%.

Friday: Rain or freezing rain likely before 10am, then rain showers. High near 37. East northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Little or no ice accumulation expected.

Friday Night: Rain and snow showers likely before 4am, then a slight chance of snow showers after 5am. Cloudy, with a low around 29. North northeast wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday: A chance of snow showers between 7am and 2pm, then a chance of rain showers after 2pm. Cloudy, with a high near 40. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Saturday Night: Partly cloudy, with a low around 26. 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 54. West northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

Sunday Night: Partly cloudy, with a low around 26.

Monday: Mostly sunny, with a high near 42.

Monday Night: Partly cloudy, with a low around 19.

Tuesday: Partly sunny, with a high near 48. Breezy.

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

Wednesday: Mostly sunny, with a high near 70. Breezy.

Wednesday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 35. Breezy. Chance of precipitation is 40%.

Thursday: A chance of rain and snow showers. Mostly cloudy, with a high near 49. Breezy. Chance of precipitation is 50%.

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain