Weather Alert in Hawaii
High Surf Warning issued February 22 at 3:02PM HST until February 24 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 WARNING FOR NORTH AND EAST FACING SHORES OF NIIHAU KAUAI OAHU MOLOKAI MAUI AND BIG ISLAND FROM NOON MONDAY THROUGH TUESDAY AFTERNOON... ...HIGH SURF ADVISORY FOR WEST FACING SHORES OF MOLOKAI MAUI AND BIG ISLAND AND FOR NORTH FACING SHORES OF LANAI MONDAY NIGHT THROUGH TUESDAY... .A long period north-northeast swell will build on Monday and peak Monday night and Tuesday. This large swell from 010 to 030 degrees will produce much larger than normal surf across some coastlines, especially in windward areas. The swell will gradually decline Tuesday night through Friday. * WHAT...Along north facing shores, surf building to 10 to 16 feet Monday and peaking at 18 to 25 feet Monday night and Tuesday. Along east facing shores, surf building to 7 to 10 feet Monday and peaking at 12 to 16 feet Monday night and Tuesday. * WHERE...North and east facing shores of Niihau, Kauai, Oahu, Molokai, Maui, and Big Island. * WHEN...From noon Monday to 6 PM HST Tuesday. * IMPACTS...Very High...Expect ocean water surging and sweeping across beaches, creating the potential for impacts to coastal roads and infrastructure, mainly along windward coasts. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling, mainly in Hilo and Kahului.
INSTRUCTION: Stay away from the shoreline along the affected coasts. Be prepared for road closures. Postpone entering or leaving channels affected by the high surf until the surf subsides.
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Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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