Weather Alert in Hawaii

Recent Locations: Albany, GA   Des Moines, IA   Hilo, HI  

High Surf Advisory issued February 25 at 3:05AM HST until February 25 at 6:00PM HST by NWS Honolulu HI

AREAS AFFECTED: Niihau; Oahu North Shore; Olomana; Maui Windward West; Kauai North; Kauai East; Koolau Windward; Molokai Windward; Molokai North; Maui Central Valley North; Windward Haleakala; Big Island East; Big Island North

DESCRIPTION: ...HIGH SURF ADVISORY FOR NORTH AND EAST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND... .A declining north-northeast (010-030 degrees) will continue to produce advisory level surf along north and exposed east facing coastlines of most islands today. * WHAT...Along north facing shores, surf of 15 to 20 feet through morning, dropping to 12 to 16 feet in the afternoon. Along east facing shores, surf of 10 to 14 feet through morning, dropping to 8 to 12 feet in the afternoon. * WHERE...North and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui, and Big Island. * WHEN...Until 6 PM HST this evening. * 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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

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Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

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

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