Weather Alert in Hawaii
High Surf Advisory issued February 24 at 3:27PM HST until February 25 at 6:00AM HST by NWS Honolulu HI
AREAS AFFECTED: Maui Leeward West; Kohala; Molokai West; Lanai Windward
DESCRIPTION: ...HIGH SURF ADVISORY FOR NORTH AND EAST FACING SHORES OF NIIHAU KAUAI AND OAHU...NORTH AND WEST FACING SHORES OF MOLOKAI MAUI AND BIG ISLAND...NORTH FACING SHORES OF LANAI THROUGH EARLY WEDNESDAY MORNING... .A long period north-northeast (010-030 degrees) peaked early this morning, producing much larger than normal surf across some coastlines, especially across windward areas. The swell will gradually decline late this afternoon through Friday. * WHAT...Along west facing shores of the Big Island in the Kohala Districts, surf heights of 6 to 8 feet. Along west facing shores of Maui, surf heights of 10 to 15 feet, dropping to 8 to 12 feet. Along west facing shores of Molokai and north facing shores of Lanai, surf heights of 8 to 12 feet. * WHERE...West facing shores of Molokai, Maui, and Big Island and for north facing shores of Lanai. * WHEN...Until 6 AM HST Wednesday. * 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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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