SATELLITE DISCUSSIONBased on data through 1800 UTC August 27 2016.
The main Hawaiian islands lie under a trade wind flow wedged between activity in the tropics to the south and southeast and troughing to the northwest.
The surface high generating the trade winds sits far north of the area and is sending a mix of scattered to locally broken cumulus clouds near the state. Individual cumulus clouds are traveling from the east-northeast at around 20 mph, with the highest concentration of low clouds noted over the eastern half of the state, where broken low clouds cover windward slopes and adjacent waters of the Big Island, Maui, and Molokai. Scattered to broken low clouds are noted on windward terrain of Oahu and Kauai. The atmosphere is rather stable, with subsidence aloft observed on water vapor imagery and cumulus tops capped around 9000 ft.
Over 1000 miles to the east-southeast of the islands, tropical storm madeline is approaching 140°W, while a band of thunderstorms on its western flank has pushed as far west as 141°W between 16°N and 14°N. Another trough, once related to madeline, extends from roughly 13°N 148°W to 12°N 160°W to 10°N 163°W. A few thunderstorms are noted near this trough.
The southern edge of a deep, nearly stationary trough sits over the northwest Hawaiian islands. A surface trough stretches along 30°N 164°W, 26°N 168°W, 27°N 175°W and 25°N 180°. Scattered thunderstorms with tops to 49000 ft have increased in coverage along the trough to the west of 175°W, with some developing near pearl and hermes atoll. Isolated thunderstorms are noted near the trough to the east of 168°W.