Issued: Apr 29, 2016 8:30 AM HST
Water vapor imagery indicates a broad trough of low pressure northwest through north of the Hawaiian islands with a ridge of high pressure to the northeast. Below the trough a cold front is located along a line from 40°N 167°W to 27°N 180°W. The cold front is moving to the east around 25 miles per hour. Layer clouds are located along and to the northwest of the front with scattered cirrus clouds extending 500 miles ahead of the front. There are even some cirrus clouds within 200 miles of a line from 30°N 152°W to Niihau, about 22°N 160°W. South of 15°N a few thin scattered cirrus clouds have been advected from near the equator into the area.
In the lower to mid levels areas of scattered to broken stratocumulus and cumulus clouds are across the region. They are rising to heights between 9 and 12 thousand feet and moving to the east-northeast at 15 to 20 miles per hour.
In the vicinity of the main Hawaiian islands, Niihau is mostly cloudy. Kauai in mostly cloudy, except along the south facing beaches where it is mostly sunny. Oahu is mostly cloudy windward and mostly sunny elsewhere. Molokai is mostly cloudy over the eastern end while the remainder of the island is mostly sunny. Kahoolawe is partly cloudy. Lanai is mostly sunny. Maui is mostly cloudy over the eastern slopes and on the eastern end of the island, otherwise it is mostly sunny. Over the Big Island it is mostly cloudy over the southeastern portion of the island while the northwest portion is partly cloudy.