Weather Alert in Hawaii
Winter Weather Advisory issued February 21 at 3:22PM HST until February 22 at 6:00AM HST by NWS Honolulu HI
AREAS AFFECTED: Big Island Summit
DESCRIPTION: ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY FOR THE BIG ISLAND SUMMITS ABOVE 12,000 FEET... .An upper level disturbance will continue to bring periods of light snow, freezing drizzle and freezing fog across the summits of Mauna Loa and Mauna Kea on the Big Island through tonight. Snow showers should generally be on the decrease tonight, but slick conditions could very well continue through the morning hours. * WHAT...Snow, freezing fog and freezing drizzle. Up to 2 inches of snowfall along with a wintry mix of icing is possible. * WHERE...Big Island Summits. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Travel could be very difficult. Freezing fog will significantly reduce visibility at times, with periods of zero visibility.
INSTRUCTION: A Winter Weather Advisory means that periods of snow, sleet, or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities and use caution while driving.
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North America Water Vapor (Moisture)
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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