Weather Alert in Hawaii
Winter Storm Warning issued February 8 at 3:27AM HST until February 9 at 6:00PM HST by NWS Honolulu HI
AREAS AFFECTED: Big Island Summit
DESCRIPTION: ...WINTER STORM WARNING IN EFFECT FOR THE BIG ISLAND SUMMITS ABOVE 11000 FEET ELEVATION... .A disturbance aloft in combination with abundant moisture will bring periods of heavy snowfall to the Big Island summits of Mauna Kea and Mauna Loa through Monday. * WHAT...Periods of heavy snow with storm total snow accumulations from 10 to 16 inches are expected. Winds could gust as high as 50 mph. * WHERE...Big Island Summits of Mauna Kea and Mauna Loa above 11,000 feet elevation. * WHEN...Until 6 PM HST Monday. * 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 Warning means significant amounts of snow, sleet, and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible. Any travel plans to the summits should be postponed until the threat diminishes.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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