Weather Alert in Hawaii
High Surf Advisory issued February 6 at 3:36PM HST until February 7 at 6:00PM HST by NWS Honolulu HI
AREAS AFFECTED: Kona; Kohala
DESCRIPTION: ...HIGH SURF WARNING FOR NORTH AND WEST FACING SHORES OF NIIHAU KAUAI OAHU AND MOLOKAI AND FOR NORTH FACING SHORES OF MAUI THROUGH 6 PM HST SATURDAY... ...HIGH SURF ADVISORY FOR WEST FACING SHORES OF THE BIG ISLAND FROM 6 AM HST SATURDAY THROUGH 6 PM HST SATURDAY... .A large west-northwest to northwest swell (295-315 degrees) will build down the island chain through the evening and peak late tonight into early Saturday. The swell will decline sharply Saturday afternoon and evening, with surf expected to fall below headline levels by Sunday morning. * WHAT...Along west facing shores of the Big Island, surf building to 7 to 10 feet Saturday morning. * WHERE...West facing shores of the Big Island. * WHEN...From 6 AM to 6 PM HST Saturday. * 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 Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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