Forecast Details for Spearfish, SD

Recent Locations: Sultana, CA Hardyville, VA Spearfish, SD

Tonight: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 58. Southeast wind around 5 mph becoming calm after midnight.

Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 66. Light and variable wind becoming northeast 5 to 10 mph in the morning. Chance of precipitation is 80%.

Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. North wind 5 to 10 mph becoming south in the evening. Chance of precipitation is 70%.

Saturday: Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 65. West wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Northeast wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.

Sunday: Mostly sunny, with a high near 71. South wind 5 to 10 mph becoming northeast in the morning. Winds could gust as high as 15 mph.

Sunday Night: Mostly clear, with a low around 53. East wind around 5 mph becoming southwest after midnight.

Labor Day: Sunny, with a high near 76. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 15 mph.

Monday Night: Mostly clear, with a low around 55.

Tuesday: Sunny, with a high near 78.

Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 52.

Wednesday: A slight chance of showers. Mostly sunny, with a high near 66.

Wednesday Night: Partly cloudy, with a low around 48.

Thursday: Sunny, with a high near 72.

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Current U.S. National Radar--Current

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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 Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds