Forecast Details for Roundup, MT

Recent Locations: Racine, MN La Junta, CO Roundup, MT

Overnight: Showers likely, mainly after 4am. Mostly cloudy, with a low around 36. Northwest wind 7 to 11 mph. Chance of precipitation is 70%.

Thursday: Rain and snow showers likely, becoming all snow after 7am. Cloudy, with a high near 46. West northwest wind 11 to 15 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Thursday Night: A 30 percent chance of snow showers between 11pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 23. North northwest wind 5 to 13 mph. New snow accumulation of less than a half inch possible.

Friday: A 30 percent chance of snow showers after noon. Mostly sunny, with a high near 49. North northwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Little or no snow accumulation expected.

Friday Night: Mostly cloudy, with a low around 25. North northwest wind 8 to 13 mph becoming light and variable.

Saturday: Sunny, with a high near 61. West wind 6 to 13 mph.

Saturday Night: Mostly clear, with a low around 32. West northwest wind 5 to 9 mph becoming light and variable.

Sunday: Sunny, with a high near 73. Southwest wind 7 to 11 mph.

Sunday Night: Partly cloudy, with a low around 40. South southwest wind 5 to 9 mph.

Monday: Mostly sunny, with a high near 78. West southwest wind 6 to 9 mph.

Monday Night: Partly cloudy, with a low around 43. Northwest wind 5 to 8 mph becoming light and variable after midnight.

Tuesday: Sunny, with a high near 81. Southwest wind 5 to 10 mph.

Tuesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 47. Southeast wind 7 to 9 mph becoming north northwest after midnight.

Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 74. West wind 8 to 17 mph.

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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 Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog