Issued: Apr 28, 2015 2:30 AM HST
Low clouds upstream of the main Hawaiian islands are beginning to thin at 2 am, but are still being carried in on the trade wind flow. This is resulting in the clouds being concentrated over the eastern sides of most of the islands overnight.
Kauai has scattered to broken low clouds over the eastern half of the island. Just before 2 am, low clouds over the Koolau range on Oahu expanded to cover most of the island. On Molokai, clouds are concentrated over the western side of the island overnight, while Lanai has just a few clouds overhead. Clouds have decreased over Maui since sunset, with scattered to broken low clouds over the east facing slopes of the west Maui mountains and Haleakala.
On the east side of the Big Island, clouds are sparse over the lowest 1000 feet in the north Hilo, Hamakua and north Kohala districts with scattered to broken low clouds between 1000 feet and about 6000 feet. Over the Puna and south Hilo districts broken to overcast clouds are found extending up to around 6000 feet. Clouds are lingering over the west side of the island over the south and north Kona districts, and extend over the western half of the Kau district.
An upper level trough remains to the northeast of the islands and continues to move away from the islands. The upper level wind flow near the Big Island is at times bringing some high clouds over the islands from the ITCZ.