Weather Alert in Hawaii
High Surf Advisory issued February 15 at 3:40AM HST until February 17 at 6:00AM HST by NWS Honolulu HI
AREAS AFFECTED: Olomana; Maui Windward West; Kauai East; Kauai South; East Honolulu; Koolau Windward; Molokai Windward; Molokai Southeast; Windward Haleakala; Kipahulu; Big Island Southeast; Big Island East; Big Island North
DESCRIPTION: ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST TUESDAY FOR EAST FACING SHORES OF KAUAI OAHU MOLOKAI MAUI AND THE BIG ISLAND... .Surf along east facing shores continue to exceed advisory thresholds and will continue to build through tonight as the trade winds strengthen. This advisory will likely be extended in time lasting into at least Wednesday due to the strong trade winds forecast to continue to blow across the region. * WHAT...Large breaking waves of 8 to 12 feet. * WHERE...East facing shorelines of Kauai, Oahu, Molokai, Maui and the Big Island. * WHEN...Until 6 AM HST Tuesday. * IMPACTS...Moderate. Strong breaking waves and strong currents will make swimming dangerous.
INSTRUCTION: Heed all advice from ocean safety officials. When in doubt, don't go out.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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