HONOLULU (KHON2) – A developing kona low will bring the threat of significant rainfall, and potentially catastrophic flooding, beginning Sunday on the Big Island and Maui County, spreading to Oahu and Kauai County Sunday night and Monday. Catastrophic rain is expected with 25+ inches of rain potential across the state.

Increasing south to southwest winds will become locally strong, especially downwind of terrain and in heavy showers and thunderstorms.

The threat of heavy rain will likely persist through Tuesday, and possibly Wednesday.

Drier trade wind flow is expected Thursday.