Forecast Details for Roundup, MT

Recent Locations: Roundup, MT  
This Afternoon: Isolated showers after 3pm. Partly sunny, with a high near 64. East southeast wind 11 to 14 mph. 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.

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

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

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.

North American Water Vapor Map

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

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