Weather Alerts for Montana
1. High Wind Warning for: Red Lodge Foothills; Southern Big Horn; Southeastern Carbon; Bighorn Canyon; Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains; Sheridan Foothills
2. High Wind Watch for: Petroleum; Garfield; Southwest Phillips
3. Winter Storm Watch for: Central and Southern Valley; McCone; Richland; Dawson; Prairie; Northern Valley
4. Winter Storm Watch for: Daniels; Sheridan; Western Roosevelt; Eastern Roosevelt
5. Winter Storm Watch for: Northern Phillips
6. Winter Weather Advisory for: Bitterroot/Sapphire Mountains
7. Winter Weather Advisory for: Butte/Blackfoot Region
8. Winter Weather Advisory for: East Glacier Park Region; Southern Rocky Mountain Front; Upper Blackfoot and MacDonald Pass; Elkhorn and Boulder Mountains; Northwest Beaverhead County
9. Winter Weather Advisory for: Flathead/Mission Valleys
10. Winter Weather Advisory for: Kootenai/Cabinet Region
11. Winter Weather Advisory for: Lower Clark Fork Region
12. Winter Weather Advisory for: Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Southern High Plains; Gates of the Mountains
13. Winter Weather Advisory for: Potomac/Seeley Lake Region
14. Winter Weather Advisory for: Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains
15. Winter Weather Advisory for: West Glacier Region
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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 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
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
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