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Hawaiian Islands Synoptic Discussion and Guidance

840
FXHW60 PHFO 070640
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
840 PM HST Mon Jul 6 2020

.SYNOPSIS...
Trade winds will gradually strengthen over the next few days and
will remain breezy through the weekend. Showers will continue to
be focused over the windward slopes especially during the nights
and early morning hours, and over leeward portions of the Big
Island during the afternoons. A slight increase in trade wind
showers are possible Wednesday and Thursday.

&&

.DISCUSSION...
High pressure north of the state is expected to strengthen over
the next couple of days, which will result in stronger trade
winds over the region. Expected the winds to remain elevated into
the weekend.

With the building trade wind flow, showers will generally remain
focused over the windward sides of the islands, along with some
afternoon clouds and showers over leeward slopes of the Big
Island. Some bands of increased showers are expected to ride in on
on the trade wind flow over the next few days, which will boost
shower activity from time to time. As the trade winds increase,
its possible for some of the showers to reach the leeward areas of
the smaller islands.

No changes to the forecast this evening, and not expecting to make
any significant changes.

&&

.AVIATION...
Tonight, high pressure well to the north of the state will help
generate moderate trade wind flow. Scattered showers, caught up in
the flow, will press up against the windward coasts and slopes.
This activity will likely bring periods of MVFR conditions due to
lowered ceilings and decreased visibility. Isolated showers
expected elsewhere across the region.

No AIRMETs are currently in effect.

&&

.MARINE...
Trade winds will increase to fresh to strong Tuesday. A Small
Craft Advisory (SCA) is in effect for the windier waters around
Maui County and the Big Island. The SCA will likely be extended
in time and expanded to additional marine areas as the trades
accelerate further this week.

Surf along south facing shores will remain small through the week,
with mainly a mix of small south and south-southeast energy. A
slightly larger south swell arriving late Wednesday may bump up
surf heights Thursday. Surf along east facing shores will rise
slowly this week as the trades increase locally and upstream of
the islands. Surf along north facing shores will remain small.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
Small Craft Advisory until 6 PM HST Wednesday for Maalaea Bay-
Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big
Island Southeast Waters.


&&

$$


DISCUSSION...M Ballard
AVIATION...Thomas
MARINE...Morrison

Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office



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It was last modified on: Wed, Dec 17 2014 - 1841 UTC
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