Issued: Oct 31, 2014 8:30 AM HST
Based on data through 8:00 am Oct 31 2014 HST
Water vapor imagery showed an upper level low near 19°N 158°W or about 140 miles south of Honolulu. The low was moving south near 10 miles an hour. The low was spawning a handful of isolated thunderstorms immediately northeast of Maui and Molokai. Storm tops were up near 40000 feet. The storms appeared to be drifting toward the southwest, slowly nearing Maui county. Another very small cluster of isolated thunderstorms was observed near 22°N 169°W. These storms were moving westward.
A broad, northeast to southwest aligned, upper trough was encompassing the upper low. The trough axis stretched roughly from 27°N 142°W to the upper low and continued southwest to near 13°N 168°W. The southwest wind flow along the south side of the trough was carrying a swath of broken cirrus clouds along with it.
The northern edge of a 275 miles wide swath of cirrus extended from 12°N 158°W through 22°N 140°W the narrowed as it continued beyond 23°N 130°W. This stream of cirrus was about 225 miles southeast of the Big Island.
Strong trade winds continued to sweep patches and larger clusters of low clouds through the Hawaiian islands region. Most of the showery low clouds between 18°N and 23°N from 140°W to 160°W were the fragmented remnants of an old frontal cloud band. The still intact front could be seen far to the northeast stretching from 25°N 134°W up through 30°N 125°W.
At 8 am, cloudy to mostly cloudy skies prevailed from Kauai to Maui, mostly along the windward and mountain sections. The lee sides of these islands were seeing somewhat fewer clouds overhead. The Big Island was mostly sunny, except for some overcast low clouds over the Hilo and Puna districts. The low clouds near the state were moving west at 30 miles an hour. Cloud tops near the islands were mostly between 10000 and 13000 feet.