Issued: Mar 26, 2015 8:30 AM HST
Based on data through 8:00 am Mar 26 2015 HST
Water vapor imagery shows an upper level trough with an axis from 32°N 150°W to 18°N 148°W moving eastward. An upper ridge with an axis from 32°N 175°W to 19°N 175°W is also moving to the east following the trough.
Infrared satellite shows a band of overcast layered clouds with embedded towering cumulus /tcu/ clouds along the eastern flank of the upper trough. The band of clouds is 150 miles wide and follows a central axis from 30°N 140°W to 25°N 143°W, then extending to 20°N 148°W as a cumulus cloud band. The TCU clouds extend as high as 30 kft in height.
A cold front goes from 30°N 139°W, across Oahu and Maui county islands to 19°N 174°W. The front is characterized by a 100 to 150 mile wide band of overcast cumulus clouds. The front merges with the band of layered clouds described earlier.
To the north and west of the front, a large area of broken to overcast stratocumulus clouds circulating clockwise around a high pressure system centered at 30°N 157°W. Cloud motions are the fastest further from the high center.
South of the front and north of 10°N, trade winds are moving low clouds east to west at around 20 mph. The clouds consist of scattered to broken areas of cumulus and stratocumulus clouds east of 160°W. From 160°W to the dateline, the clouds consist of scattered cumulus clouds.
Across the main Hawaiian islands, broken cumulus clouds and scattered showers cover much of the windward coastal waters, especially upstream of Oahu, Molokai and Maui. Kauai has broken clouds across the windward half with sunny skies over the leeward half. Similarly, Oahu has broken clouds over the eastern half and mostly sunny skies across the western half. Molokai is mostly cloudy over most of the northern sections with some breaks along the southern coastline. Lanai is mostly cloudy this morning. Maui is mostly cloudy across the windward portion of Haleakala and most of the west Maui mountains. The rest of the island of Maui is mostly sunny at this time. On the Big Island, .mostly cloudy skies prevail over the windward slopes from Upolu Point to Volcano up to around 6000 feet in elevation, while the rest of the Big Island is sunny.