Weather Alert in Wyoming
Winter Storm Warning issued February 25 at 1:31AM MST until February 25 at 5:00PM MST by NWS Riverton WY
AREAS AFFECTED: Yellowstone National Park
DESCRIPTION: * WHAT...Heavy snow. Additional snow accumulations of 5 to 10 inches over the Pitchstone Plateau, with isolated amounts up to 12 inches. An additional 2 to 5 inches across central portions of Yellowstone and up to 1 inch in Lamar Valley and Mammoth. Gusty west winds of 20 to 35 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Backcountry travel will be very difficult.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter. For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info.
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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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