Forecast Details for East Helena, MT

Recent Locations: East Helena, MT  
Tonight: A slight chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 22. North wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Thursday: A 20 percent chance of snow after 2pm. Mostly sunny, with a high near 45. Light and variable wind becoming north 9 to 14 mph in the morning.
Thursday Night: Mostly cloudy, with a low around 21. Northwest wind 8 to 15 mph, with gusts as high as 20 mph.
Friday: Mostly sunny, with a high near 43. North wind 7 to 13 mph.
Friday Night: Mostly clear, with a low around 20. North northeast wind 12 to 17 mph becoming light after midnight.
Saturday: Sunny, with a high near 56. Calm wind becoming east 5 to 8 mph in the morning.
Saturday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33. East southeast wind 7 to 9 mph becoming south after midnight.
Sunday: A chance of rain. Partly sunny, with a high near 56. South southwest wind 7 to 17 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.
Sunday Night: Partly cloudy, with a low around 32.
Monday: Mostly sunny, with a high near 60.
Monday Night: Partly cloudy, with a low around 32.
Tuesday: Mostly sunny, with a high near 66.
Tuesday Night: Partly cloudy, with a low around 39.
Wednesday: A chance of rain. Partly sunny, with a high near 68.

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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

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Today's National Weather Map

National Weather Forecast for Tomorrow

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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 Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds