Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 312 AM EDT Fri May 23 2025 Valid 00Z Sat 24 May 2025 - 00Z Sat 31 May 2025 An upper low/trough now over Hawaii offers some instability, while normal to above normal moisture levels remain pooled. Moderate to breezy easterly trades also continue as surface high pressure bridges to the north of the state. This adds up to a wet trade wind pattern with possibly some heavy showers and a few thunderstorms today. Some activity may linger into Saturday. Through the rest of the holiday weekend, moderate to breezy trades are likely to persist, but guidance continues to agree in showing moisture levels and showers gradually decreasing as the trough aloft slowly slides away. Trade winds may weaken slightly to moderate levels by Tuesday-Friday in this drier pattern. Schichtel