Forecast Details for Keystone, SD

Recent Locations: Monroe, SD Riverside, CA Keystone, SD

Today: A 20 percent chance of snow showers after noon. Cloudy, with a high near 39. Light southeast wind becoming east 5 to 9 mph in the morning. Winds could gust as high as 25 mph.

Tonight: A 20 percent chance of snow showers before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 26. East wind 5 to 7 mph becoming south after midnight. Winds could gust as high as 23 mph.

Tuesday: Mostly sunny, with a high near 63. South wind 6 to 9 mph, with gusts as high as 24 mph.

Tuesday Night: A slight chance of rain showers before 4am, then a slight chance of rain and snow showers between 4am and 5am, then a slight chance of snow showers after 5am. Partly cloudy, with a low around 35. South wind 5 to 9 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

Wednesday: A 30 percent chance of snow showers before noon. Mostly sunny, with a high near 53. Northwest wind 8 to 11 mph, with gusts as high as 34 mph.

Wednesday Night: A 20 percent chance of snow showers after midnight. Mostly clear, with a low around 29. Northwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 30 mph.

Thursday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 53. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 22 mph.

Thursday Night: A slight chance of rain showers before midnight, then a slight chance of snow showers. Partly cloudy, with a low around 31. East wind around 6 mph becoming calm in the evening. Winds could gust as high as 20 mph.

Friday: A chance of showers, mainly after noon. Partly sunny, with a high near 56.

Friday Night: A chance of showers, mainly before midnight. Mostly cloudy, with a low around 43.

Saturday: A chance of showers. Partly sunny, with a high near 72.

Saturday Night: A chance of showers. Mostly cloudy, with a low around 49.

Sunday: A chance of showers. Mostly sunny, with a high near 70.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation