Forecast Details for Roy, MT

Recent Locations: Laconia, NH Omaha, TX Roy, MT

Current Alerts for Roy, MT: Winter Weather Advisory

Overnight: Mostly cloudy, with a low around 24. Southeast wind 6 to 8 mph.

Wednesday: Sunny, with a high near 51. East southeast wind 6 to 14 mph, with gusts as high as 22 mph.

Wednesday Night: A slight chance of rain before 2am, then a slight chance of rain after 4am. Increasing clouds, with a low around 33. Southeast wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

Thursday: Rain, possibly mixed with snow, becoming all rain after 3pm. High near 46. East wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Thursday Night: Snow, possibly mixed with rain, becoming all snow after midnight. Low around 30. North wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

Friday: Snow likely, mainly before noon. Cloudy, with a high near 40. Northwest wind 14 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

Friday Night: Partly cloudy, with a low around 27. Northwest wind 6 to 11 mph becoming west southwest after midnight. Winds could gust as high as 21 mph.

Saturday: Sunny, with a high near 55. West wind 8 to 13 mph, with gusts as high as 21 mph.

Saturday Night: Partly cloudy, with a low around 34.

Sunday: Mostly sunny, with a high near 57.

Sunday Night: Mostly cloudy, with a low around 34.

Monday: Mostly cloudy, with a high near 52.

Monday Night: Partly cloudy, with a low around 34.

Tuesday: Mostly sunny, with a high near 66.

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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 are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

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