Weather Alert in Montana
Winter Weather Advisory issued April 1 at 11:02AM MDT until April 3 at 6:00AM MDT by NWS Missoula MT
AREAS AFFECTED: Butte/Blackfoot Region
DESCRIPTION: * WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations between 4 and 7 inches for Butte, Georgetown Lake, Homestake Pass and MacDonald Pass. 1 to 3 inches for the lower valleys. Winds gusting as high as 35 mph. * WHERE...Highway 12 Garrison to Elliston, Butte, MacDonald Pass, Homestake Pass, and Georgetown Lake. * WHEN...From 6 AM Thursday to 6 AM MDT Friday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. * ADDITIONAL DETAILS...Heavy snow showers may occur mid morning on Thursday, causing low visibility and quickly changing road conditions.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
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: Cumulonimbus Clouds
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