Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Honolulu HI
1000 am HST Friday Aug 22 2014
a trade wind weather pattern can be expected over the next several
days as high pressure remains centered far to the northeast of the
state. Clouds and passing showers will tend to favor windward and
Mauka areas with a few showers possible over some leeward locations.
an area of showery low clouds is presently moving into the islands
from the east providing for some scattered showers over windward and
Mauka areas with just a few showers being blown over to some leeward
locations of the smaller islands.
An area of high pressure is expected to persist far to the northeast
of the state for the next several days. This will keep the islands
in a trade wind pattern. However the high is expected to weaken a
bit later this weekend and on into next week resulting in a slight
drop off in trade wind speeds.
Moisture embedded in the trades will continue to produce scattered
showers for windward and Mauka locations with just a few possible
over some leeward locations as well.
areas of showery and stable low clouds moving over the islands
within the trade wind flow will bring periods of MVFR visible/ceiling in
rain showers to windward slopes...coasts and waters. Some of the rain showers will
spread leeward on Oahu...Molokai and Maui through this morning.
While VFR conditions will prevail at the terminals...brief MVFR
visible/ceiling are expected at phto...and may possibly affect phny...phmk
and phog. No airmets are in effect.
a Small Craft Advisory is in effect for the usual windy waters
around Maui County and The Big Island through tonight. Winds are
expected to drop off just a bit over the weekend and on into early
A high surf advisory is in effect for south facing shores. This
swell will gradually lower tonight and Saturday. A series of
moderate size south swell are expected over the next several days
with a slightly larger swell possible Wednesday and Thursday. The
combination of easterly trade winds and swells from distant tropical
cyclones will continue to produce moderate size surf along east
facing shores through the weekend and on through the middle of next
high surf advisory until 6 PM HST this evening for Niihau-Kauai
windward-Kauai leeward-Oahu South Shore-Waianae coast-Molokai
leeward-Lanai-Kahoolawe-Maui leeward west-Maui Central Valley-
leeward Haleakala-Kona-south Big Island-kohala.
Small Craft Advisory until 6 am HST Saturday for Maalaea Bay-
Pailolo Channel-Alenuihaha Channel-Big Island southeast waters.