Forecast Details for Wounded Knee, SD

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Overnight: A 50 percent chance of snow. Cloudy, with a low around 32. Northwest wind around 6 mph.
Wednesday: A chance of snow, mixing with rain after 7am, then gradually ending. Mostly cloudy, with a high near 40. Northwest wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Wednesday Night: Mostly cloudy, with a low around 22. North wind around 5 mph becoming calm in the evening.
Thursday: Mostly sunny, with a high near 48. Light southwest wind increasing to 5 to 9 mph in the morning.
Thursday Night: Partly cloudy, with a low around 25. South wind around 6 mph becoming calm after midnight.
Friday: Mostly sunny, with a high near 53. Calm wind.
Friday Night: Mostly cloudy, with a low around 31.
Saturday: A chance of rain, mainly after 11am. Mostly cloudy, with a high near 49.
Saturday Night: Partly cloudy, with a low around 27.
Sunday: Partly sunny, with a high near 52.
Sunday Night: A slight chance of rain. Partly cloudy, with a low around 35.
Monday: Mostly sunny, with a high near 57.
Monday Night: Partly cloudy, with a low around 32.
Tuesday: A chance of rain. Mostly sunny, with a high near 53.

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Current U.S. National Radar--Current

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Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow