Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
331 AM EDT Thu Jun 22 2023

Valid 00Z Fri Jun 23 2023 - 00Z Fri Jun 30 2023

Mid-upper ridging should continue to build across Hawaii for late
week into the weekend, which will increase stability and lessen
chances for too many showers. Meanwhile a Pacific surface high to
the north is moving southwest closer to the state, tightening the
pressure gradient and producing breezy easterly trades. These
could perhaps strengthen further to windy levels by Friday and
continuing through the weekend into early next week, given the
high's position and especially in typical areas where terrain and
islands can increase winds.

The high pressure system may weaken slightly next week, but remain
in place while another high comes in northwest of Hawaii. Thus
trade winds should remain but may lessen somewhat to around
moderate/locally breezy levels by Tuesday-Thursday. Aloft, a weak
trough may replace the weekend ridge, allowing for a slightly more
favorable pattern for showers though moisture does not look to
increase. Any showers that do form should favor windward/mountain
areas, but widespread rain is not expected.

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