Forecast Details for Potomac, MT

Recent Locations: Weare, NH Globe, AZ Potomac, MT

Today: A chance of snow before noon, then snow showers likely, mainly after 4pm. Some thunder is also possible. Partly sunny, with a high near 42. West wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Tonight: A 50 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 26. West northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 21 mph. New snow accumulation of less than a half inch possible.

Friday: A chance of snow before 3pm, then a chance of rain and snow. Partly sunny, with a high near 47. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 50%. Little or no snow accumulation expected.

Friday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 23. West wind 5 to 7 mph becoming calm in the evening.

Saturday: Sunny, with a high near 59. Calm wind becoming west around 5 mph in the afternoon.

Saturday Night: Partly cloudy, with a low around 30.

Sunday: Mostly sunny, with a high near 69.

Sunday Night: Partly cloudy, with a low around 37.

Monday: Mostly sunny, with a high near 74.

Monday Night: Partly cloudy, with a low around 41.

Tuesday: A slight chance of rain. Mostly sunny, with a high near 73.

Tuesday Night: A chance of rain. Mostly cloudy, with a low around 41.

Wednesday: A chance of rain. Mostly cloudy, with a high near 61.

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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