Radar Animation for Butte, MT

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North America Current Weather Conditions - Infrared

This infrared image shows clouds and precipation across North America by displaying the relative warmth of objects. Colder objects are brighter and warmer objects are darker. Lower layers of clouds are generally warmer and are gray. Colder and higher clouds tops are highlighted in colors.

Infrared Weather Radar 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

National Weather Conditions--Current

National Weather Map--Today

Todays National Weather Map

National Weather Forecast--Tomorrow

National Weather Map--Tomorrow

Tomorrows National Weather Map

National Weather Alerts and Warnings

National Weather Alerts and Warnings. Note that Coordinated Universal Time (UTC) is a 24-hour time standard, is determined using atomic clocks, and expresses the mean solar time at the Earth's prime meridian (zero degrees longitude) located near Greenwich, England. Time zones around the world are expressed as positive or negative offsets from UTC (Eastern Time is -4 hours and Pacific Time is -7 hours). UTC is also often casually interchanged with Greenwich Mean Time (GMT).

National Weather Alerts Map







Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

nimbostratus clouds Next Topic: Stratocumulus Clouds

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: Stratocumulus Clouds

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

contrails Next Topic: Fog

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Fog

This page shows animated radar for the following ZIP codes:
59701, 59702, 59703, 59707, 59750