Based on data through 8:00 am May 05 2011 HST
An upper level low over the main Hawaiian islands continues to bring unstable air over the Hawaiian islands. Enhanced showers are found across the islands as a result of the instability introduced by the upper level system. Low level winds near the islands are from the east due to a high pressure system to the north northeast of the islands.
Low clouds cover most of Niihau and Kauai at 8 am. On Oahu, clouds cover the Koolau range, and most of the Waianae range. The clouds over these mountain ranges are spreading over adjacent areas. Molokai has clouds over the eastern end of the island. Meanwhile, clouds blanket Lanai, Kahoolawe and most of Maui. On Maui, the area of the island with the fewest clouds are the west facing slopes of Haleakala.
Overall the Big Island has the fewest clouds overhead at 8 am. There are low clouds over the north Hilo, south Hilo and Puna districts. Additional clouds are found over the remaining districts, but not as heavily concentrated.
Thunderstorms have been noted in the Big Island plume overnight. Cloud tops in the Big Island plume are reaching near 38 thousand feet at 8 am. Additional towering cumulus are found about 110 miles southwest of Honolulu with tops reaching near 32 thousand feet.