Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
341 AM EDT Sat Apr 12 2025

Valid 00Z Sun 13 Apr 2025 - 00Z Sun 20 Apr 2025


Surface high pressure north of Hawaii will promote breezy 
easterly trades that should continue through the weekend and into 
early next week. Periods of transient above normal moisture levels
will keep this a showery pattern especially Saturday, with the 
showers favoring windward and mauka areas.

High pressure is forecast to weaken and pull away Tuesday and 
beyond, weakening the trades at least somewhat. Meanwhile a trough
aloft will approach, pushing a surface cold front that stalls 
west of the state for the latter half of next week. There is some 
uncertainty in how much the winds could veer (and weaken) in 
response to the front. But there is an increasing model signal for
the front to draw moisture northward atop the islands and 
increase shower coverage. Given the trough aloft, there could be 
some heavy downpours, so continue to monitor the forecast.


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