Forecast Details for Opal, WY

Recent Locations: Helena, MO Rhame, ND Opal, WY

Overnight: Showers likely, mainly after 4am. Cloudy, with a low around 36. Southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday: Rain and snow showers likely before 1pm, then a chance of rain showers between 1pm and 4pm. Some thunder is also possible. Mostly cloudy, with a high near 51. Breezy, with a west northwest wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Wednesday Night: A chance of rain and snow showers before 3am, then a chance of rain showers between 3am and 5am, then a chance of rain and snow showers after 5am. Increasing clouds, with a low around 32. Breezy, with a south southwest wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

Thursday: Snow showers, possibly mixed with rain, becoming all snow after noon. Some thunder is also possible. High near 42. Windy, with a west wind 10 to 15 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Thursday Night: Partly cloudy, with a low around 21. Breezy, with a west wind 15 to 23 mph, with gusts as high as 33 mph.

Friday: Partly sunny, with a high near 41. Breezy, with a west northwest wind 15 to 22 mph, with gusts as high as 31 mph.

Friday Night: Mostly clear, with a low around 22. Blustery, with a west wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.

Saturday: Sunny, with a high near 52.

Saturday Night: Clear, with a low around 24.

Sunday: Sunny, with a high near 58.

Sunday Night: Mostly clear, with a low around 28.

Monday: Sunny, with a high near 62.

Monday Night: Mostly clear, with a low around 31.

Tuesday: Sunny, with a high near 65.

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

Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds