Weather Alert in Hawaii
High Surf Advisory issued February 23 at 3:30PM HST until February 24 at 6:00PM HST by NWS Honolulu HI
AREAS AFFECTED: Maui Leeward West; Kohala; Molokai West; Lanai Windward
DESCRIPTION: ...HIGH SURF WARNING FOR NORTH AND EAST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND THROUGH TUESDAY... ...HIGH SURF ADVISORY FOR WEST FACING SHORES OF MOLOKAI MAUI AND BIG ISLAND AND FOR NORTH FACING SHORES OF LANAI THROUGH TUESDAY... .A long period north-northeast (010-030 degrees) swell will peak tonight and Tuesday, producing much larger than normal surf across some coastlines, especially in windward areas. The swell will gradually decline Tuesday night through Friday. * WHAT...Along west facing shores of the Big Island in the Kohala Districts, surf building to 6 to 10 feet tonight and continuing into Tuesday. Along west facing shores of Maui, surf building to 10 to 16 feet tonight and continuing into Tuesday. Along west facing shores of Molokai and north facing shores of Lanai, surf building to 10 to 16 feet tonight and continuing into Tuesday. * WHERE...West facing shores of Molokai, Maui, and Big Island and for north facing shores of Lanai. * WHEN...From 6 PM this evening to 6 PM 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 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
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
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