Issued: Apr 19, 2014 2:30 PM HST
A stable trade wind flow dominates across most of the region, while a weak upper level low is spinning about 550 miles to the southwest of the main Hawaiian islands.
The trade winds are being driven by a surface high centered north of 30°N and continue to be only partially interrupted by a dissipating front located 500 miles north of Kauai. The nearly stationary feature is marked by a 100 mile-wide band of overcast low clouds centered along 30°N 160°W and 28°N 172°W. The front dissipates to the west near Midway atoll, where low cloud motions veer out of the southeast.
Over the main Hawaiian islands, a mix of scattered to locally broken stratocumulus clouds are moving in the trade wind flow from the east northeast around 20 mph. Broken low clouds are piled up along windward slopes of all islands, and a small cluster of broken low clouds passing over northern Oahu is spilling over to the north shore. Elsewhere on the smaller islands, only few to scattered low clouds are observed over leeward areas. Broken to overcast low clouds blanket the lower leeward slopes of the Big Island south of waikoloa and around to eastern Kau. To the east of the state from 27°N to 17°N lies a vast field of scattered to broken stratocumulus clouds with some embedded cumulus clouds.
A weak nearly stationary upper level low is centered southwest of the islands near 16°N 164°W. This feature had been generating a few thunderstorms this morning along the southeast flank, but this activity has ceased. The upper low continues to generate a shield of scattered to broken high clouds from 22°N to 07°N mainly between 164°W and 150°W. The northern fringe of this cloud field is passing over the state.