Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
326 AM EDT Sat Aug 19 2023

Valid 00Z Sun Aug 20 2023 - 00Z Sun Aug 27 2023

The overall weather pattern across the Hawaii domain is expected
to be relatively uneventful through this weekend with mainly
moderate trade winds from the ENE expected and windward showers
across the southeastern Islands.  By early Monday, attention then
turns to the approaching remnants of former T.S. Fernanda, with
the model guidance continuing to suggest the remnant low will pass
south of the Big Island Monday evening.  However, the northern
periphery will likely encompass locations from Oahu to the Big
Island with PWs rising to near or slightly above 2 inches,
accompanied by heavy showers and a few thunderstorms.  This will
mainly be on Monday into Monday night with the potential for
several inches of rainfall that could result in some flooding
issues.

In the wake of this system will be a return to more seasonal
levels of atmospheric moisture and trade wind enhanced showers. 
Trades will return to a generally easterly direction by Tuesday
and beyond at speeds of 10-20 mph in most cases with the main
subtropical high remaining well north of the state near 40N/150W. 

Hamrick