Weather Alert in Idaho
Special Weather Statement issued February 19 at 8:46AM PST by NWS Spokane WA
AREAS AFFECTED: Northern Panhandle; Northeast Mountains; Okanogan Highlands
DESCRIPTION: At 846 AM PST, an area of heavy snow was located near Chewelah, or 34 miles west of Priest River, moving north at 15 mph. Locations impacted include... Priest River, Colville, Chewelah, Newport, Nordman, Sherman Pass, Kettle Falls, Ione, Northport, Metaline Falls, Cusick, Oldtown, Marcus, Metaline, Pierre Lake Campground, Davis Lake, Addy, Cedonia, Beaver Creek Campground, and Gifford. This includes the following highways... U.S. Highway 2 in Idaho between mile markers 0 and 8. U.S. Highway 2 in Washington between mile markers 0 and 8. U.S. Highway 20 in Washington between mile markers 308 and 436. U.S. Highway 395 in Washington between mile markers 194 and 270. Visibilities will drop quickly to less than a half mile in this area of heavy snow. Icy roads are possible as the snow melts on the roads then quickly refreezes. Conditions can deteriorate rapidly in winter weather situations. Be prepared for snow or ice covered roads. Slow down and allow extra time when traveling.
INSTRUCTION: N/A
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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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