Forecast Details for Boulder, WY

Recent Locations: Asheville, NC Yeoman, IN Boulder, WY

Overnight: Areas of smoke. Mostly cloudy, with a low around 47. Northwest wind 3 to 5 mph.

Monday: Scattered showers and thunderstorms, mainly after 2pm. Areas of smoke. Mostly cloudy, with a high near 72. Light and variable wind becoming east northeast 9 to 14 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%.

Monday Night: Scattered showers and thunderstorms, mainly before midnight. Areas of smoke before 11pm. Mostly cloudy, with a low around 47. East northeast wind 6 to 11 mph becoming light and variable. Chance of precipitation is 40%.

Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Increasing clouds, with a high near 75. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 60%.

Tuesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 47. South southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.

Wednesday: Showers and possibly a thunderstorm. High near 68. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 90%.

Wednesday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 43. West northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.

Thursday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 70. Chance of precipitation is 60%.

Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40.

Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69. Chance of precipitation is 40%.

Friday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 39.

Saturday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 71.

Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 40.

Sunday: A slight chance of showers and thunderstorms. Mostly 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 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