Forecast Details for East Helena, MT

Recent Locations: East Helena, MT  
Overnight: Showers likely, mainly before 3am. Mostly cloudy, with a low around 42. North northwest wind 7 to 9 mph. Chance of precipitation is 60%.
Saturday: A chance of showers before noon, then rain, mainly after noon. High near 53. West wind 5 to 8 mph becoming east in the afternoon. Chance of precipitation is 80%.
Saturday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 37. West wind 6 to 10 mph becoming south in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday: A 20 percent chance of rain after noon. Partly sunny, with a high near 61. West wind 6 to 15 mph, with gusts as high as 21 mph.
Sunday Night: Mostly cloudy, with a low around 36. West southwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 23 mph.
Monday: Rain likely before noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 54. Breezy, with a west wind 7 to 12 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 70%.
Monday Night: A slight chance of rain, mixing with snow after 9pm, then gradually ending. Partly cloudy, with a low around 31. Breezy, with a west southwest wind 16 to 25 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Tuesday: A slight chance of rain after noon. Mostly sunny, with a high near 55. West southwest wind 16 to 18 mph, with gusts as high as 29 mph.
Tuesday Night: A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 3am, then a slight chance of snow after 3am. Mostly cloudy, with a low around 31.
Wednesday: A slight chance of snow before 9am, then a slight chance of rain and snow between 9am and noon, then a chance of rain after noon. Partly sunny, with a high near 57.
Wednesday Night: Partly cloudy, with a low around 32.
Thursday: A chance of rain. Mostly sunny, with a high near 65.
Thursday Night: A chance of rain. Mostly cloudy, with a low around 38.
Friday: A chance of rain. Partly sunny, with a high near 63.

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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.

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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