Forecast Details for Roundup, MT

Recent Locations: Roundup, MT  
Today: Isolated showers after 3pm. Partly sunny, with a high near 64. North northeast wind 8 to 14 mph becoming east southeast in the afternoon. Chance of precipitation is 20%.
Tonight: Isolated showers between midnight and 3am. Mostly cloudy, with a low around 41. East southeast wind 7 to 14 mph becoming west southwest after midnight. Chance of precipitation is 20%.
Sunday: A 30 percent chance of showers, mainly after noon. Partly sunny, with a high near 64. West wind 6 to 9 mph becoming north in the afternoon.
Sunday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 40. North northwest wind 5 to 8 mph.
Monday: Showers, mainly after noon. High near 65. Southwest wind 6 to 11 mph. Chance of precipitation is 80%.
Monday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 36. West wind 13 to 18 mph. Chance of precipitation is 80%.
Tuesday: A slight chance of rain and snow showers before noon, then a slight chance of rain showers. Partly sunny, with a high near 56. West wind 18 to 24 mph. Chance of precipitation is 20%.
Tuesday Night: A slight chance of rain showers before midnight, then a slight chance of rain and snow showers. Partly cloudy, with a low around 33. West wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Chance of precipitation is 20%.
Wednesday: A chance of rain and snow showers before noon, then a chance of rain showers. Partly sunny, with a high near 53. West wind 9 to 15 mph becoming north northwest in the afternoon. Chance of precipitation is 50%.
Wednesday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 33. North wind 11 to 15 mph.
Thursday: A 20 percent chance of showers. Partly sunny, with a high near 59. North wind 10 to 13 mph.
Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 34. North northeast wind 9 to 13 mph becoming west after midnight.
Friday: A 40 percent chance of showers. Partly sunny, with a high near 62. West northwest wind 9 to 14 mph becoming north northeast in the afternoon.

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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