Forecast Details for Casper, WY

Recent Locations: Backus, MN Primghar, IA Casper, WY

Current Alerts for Casper, WY: Fire Weather Watch

Today: Sunny, with a high near 80. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 23 mph.

Tonight: Mostly cloudy, with a low around 51. Southwest wind 7 to 10 mph becoming east southeast after midnight.

Wednesday: Mostly sunny, with a high near 74. Windy, with a southwest wind 11 to 21 mph increasing to 24 to 34 mph. Winds could gust as high as 47 mph.

Wednesday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 39. Windy, with a west southwest wind 30 to 34 mph, with gusts as high as 47 mph.

Thursday: A chance of rain and snow showers before 9am, then rain showers likely. Some thunder is also possible. Partly sunny, with a high near 55. Windy, with a west southwest wind 28 to 33 mph becoming northwest 17 to 22 mph in the afternoon. Winds could gust as high as 44 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Thursday Night: Rain and snow showers likely, becoming all snow after midnight. Some thunder is also possible. Mostly cloudy, with a low around 25. Blustery, with a northwest wind 9 to 16 mph becoming northeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

Friday: Snow showers likely. Some thunder is also possible. Partly sunny, with a high near 44. Northeast wind 9 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

Friday Night: A 30 percent chance of snow showers. Mostly cloudy, with a low around 22.

Saturday: A slight chance of snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Mostly sunny, with a high near 49. Chance of precipitation is 20%.

Saturday Night: A slight chance of rain and snow showers before 3am, then a slight chance of snow showers. Mostly cloudy, with a low around 25. Chance of precipitation is 20%.

Sunday: A chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 50.

Sunday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 29.

Monday: A chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 53.

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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)

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 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

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