Weather Alert in Hawaii
Winter Storm Watch issued February 7 at 3:21AM HST until February 9 at 6:00PM HST by NWS Honolulu HI
AREAS AFFECTED: Big Island Summit
DESCRIPTION: ...WINTER STORM WATCH IN EFFECT FOR THE BIG ISLAND SUMMITS ABOVE 11000 FEET... .A disturbance aloft in combination with abundant moisture could bring periods of heavy snowfall to the Big Island summits of Mauna Kea and Mauna Loa tonight through Monday afternoon. * WHAT...Heavy snow possible. Storm total snow accumulations of greater than 12 inches possible. Winds could gust as high as 45 mph. * WHERE...Big Island Summits. * WHEN...From this evening through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible. Blowing snow will significantly reduce visibility at times, with periods of zero visibility.
INSTRUCTION: A Winter Storm Watch means there is potential for significant snow or ice accumulations that may impact the summits. Anyone planning travel to the summits, including hikers and campers, should monitor the latest forecasts and consider postponing their trip until improved weather returns.
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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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