Forecast Details for East Helena, MT

Recent Locations: East Helena, MT

Overnight: A 30 percent chance of snow, mainly after 5am. Mostly cloudy, with a low around 37. South southwest wind around 6 mph. Little or no snow accumulation expected.

Monday: A chance of snow before 9am, then rain showers. Some thunder is also possible. High near 53. West wind 5 to 10 mph becoming west northwest 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Monday Night: A chance of rain and snow showers before 9pm, then a slight chance of snow between 9pm and 11pm. Some thunder is also possible. Cloudy during the early evening, then gradual clearing, with a low around 29. Breezy, with a west wind 18 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

Tuesday: A chance of snow before 3pm, then a chance of rain and snow between 3pm and 4pm, then a chance of rain after 4pm. Mostly sunny, with a high near 50. Breezy, with a west wind 18 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

Tuesday Night: A 20 percent chance of snow after midnight. Partly cloudy, with a low around 29. Blustery, with a west southwest wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 26 mph.

Wednesday: A chance of snow before noon, then snow showers likely, possibly mixed with rain between noon and 3pm, then rain showers likely after 3pm. Some thunder is also possible. Mostly cloudy, with a high near 49. Breezy, with a west southwest wind 13 to 22 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Wednesday Night: A chance of rain before 9pm, then a chance of snow. Mostly cloudy, with a low around 32. West northwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Thursday: A chance of snow before noon, then a chance of rain and snow between noon and 3pm, then a chance of rain after 3pm. Partly sunny, with a high near 53. West wind 8 to 11 mph.

Thursday Night: A chance of rain before 9pm, then a chance of snow. Mostly cloudy, with a low around 32.

Friday: A chance of snow before noon, then a chance of rain. Partly sunny, with a high near 52.

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

Saturday: A slight chance of rain. Mostly sunny, with a high near 62.

Saturday Night: A slight chance of rain. Partly cloudy, with a low around 35.

Sunday: A chance of rain and snow. Partly sunny, with a high near 63.

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds