Issued: Apr 24, 2014 8:30 AM HST
Surface high pressure centered north of 30°N is driving a trade wind flow across nearly all of the region. The flow turns southeasterly near Midway atoll as the surface ridge has been displaced just south of 30°N to the west of 170°W. The area north of 24°N is dominated by scattered to locally broken stratocumulus while cumulus clouds prevail between 24°N and 10°N.
Near the main Hawaiian islands, a 150 mile-wide, nearly east to west oriented band of broken cumulus clouds is impacting Kauai and is skirting just north of the other islands. The band is centered along 21°N 140°W, 21°N 150°W, 23°N 160°W, and 22°N 170°W. Individual low clouds within the band near the islands are travelling from the east-northeast 25 to 30 mph, and cloud tops are rising as high as 10000 ft.
The cloud band is producing overcast low clouds over windward slopes of Kauai. Scattered to broken low clouds cover windward sections of the remaining islands, and mainly few to scattered low clouds are noted across leeward areas.
A shallow upper level trough bisects the region from 30°N 140°W, 25°N 160°W, and 19°N 180°. This feature is travelling to east near 30 mph east of 160°W and is nearly stationary to the west. The upper trough is drawing up broken high clouds over waters south of 17°N. The source of the upper level moisture is thunderstorm activity within the ITCZ. These thunderstorms are confined between 09°N and 03°N.