Forecast Details for Helmville, MT

Recent Locations: Vernon, NY Washburn, WI Helmville, MT

Overnight: Mostly cloudy, with a low around 29. Calm wind.

Wednesday: Rain likely, mainly after 5pm. Snow level 5100 feet rising to 6500 feet in the afternoon. Partly sunny, with a high near 58. Calm wind. Chance of precipitation is 60%.

Wednesday Night: Rain, mainly after 4am. Low around 32. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: Rain and snow, becoming all snow after noon. Snow level 5400 feet lowering to 4400 feet in the afternoon . High near 41. Light west northwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

Thursday Night: Snow. Low around 29. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Friday: A chance of snow before noon, then a slight chance of rain and snow between noon and 3pm, then a slight chance of rain after 3pm. Mostly cloudy, with a high near 47. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Friday Night: Partly cloudy, with a low around 24.

Saturday: Sunny, with a high near 56.

Saturday Night: Mostly clear, with a low around 29.

Sunday: Mostly sunny, with a high near 60.

Sunday Night: Mostly cloudy, with a low around 31.

Monday: Partly sunny, with a high near 63.

Monday Night: Partly cloudy, with a low around 35.

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)

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Weather Topic: What is Precipitation?

Home - Education - 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