Issued: Nov 23, 2014 8:30 AM HST
Based on data through 8:00 am Nov 23 2014 HST
A large, deep upper level trough extended south from Alaska to about 575 miles west-northwest of Kauai this morning. The trough axis passed through 40°N 168°W to 30°N 169°W to 23°N 169°W. A surface front associated with the upper trough extended through 30°N 160°W to 22°N 170°W to 20°N 180°E. The front was just over 350 miles northwest of Kauai and moving southeast toward the islands near 12 miles an hour.
The frontal cloud band south of 30°N was about 150 miles wide and broken to overcast low clouds. But north of 27°N, the band was comprised mainly of overcast layered clouds with isolated thunderstorms embedded within it north of 28°N.
Meanwhile, ahead of the front, a few small patches and several large clusters of low clouds were moving across the Hawaiian islands. One large, 100 by 165 miles wide, cluster of overcast low clouds Sat just south of Oahu and stretched toward the south southwest.
The other clusters nearby were mostly east of the island chain. The clouds were flowing toward the northwest except those near the Big Island which were moving due west. The clouds were moving along near 15 miles an hour. Clouds tops near the islands were around 9000 feet. At 8 am, skies were clear over the islands except for the Hilo and Puna districts of the Big Island.