A High Wind Warning has been extended until 6 a.m. Thursday for the Kohala district of the Big Island. A Wind Advisory has been extended until 6 a.m. Thursday for Maui County, Oʻahu, Kauaʻi and parts of the Big Island.
An unstable tropical moisture band will keep widespread rainfall in the forecast, heavy at times, with developing thunderstorms across much of the state.
Periods of extremely heavy rainfall are expected as a Kona Low develops west of Kauaʻi, and pulls deep moisture over the islands. A slow-moving band of heavy rain is expected to move over the Big Island and Maui County today, spreading to Oʻahu and Kauaʻi County tonight and Monday. Widespread rainfall total amounts of 10 to 15 inches are anticipated, with isolated areas of 20 to 25 inches possible.
At 3:18 p.m. HST, radar indicated that moderate to heavy rainfall continues to move over Maui from the south. Rain rates of about 1 inch per hour were occurring over the south- facing slopes of Haleakalā. Rainfall will continue to move over Maui from the south over the next several hours.