Last Updated on Thursday, 05 December 2013 11:50
Issued: Dec 05, 2013 7:40 PM HST
The animation of the satellite infrared imagery shows a dissipating front approaching Kauai from the northwest. As of 7 pm HST, the front was 95 miles northwest of Kauai's na Pali coast, moving southeast at 15 mph, at least since 1230 pm HST. The coordinates of the front are 30°N 153°W 23°N 160°W 21°N 167°W 20°N 171°W. The front curled northward to a deep low pressure system at 41°N 161°W, and westward beyond 23°N 180°W.
The animation also revealed north and northeast winds running out ahead of the front, suggesting the front is weakening, weakening to a shear line. The light northeast winds extended out to Oahu. The front had a cloud band that is 65 miles wide.
Cloud wise, there is a dissipating northeast to southwest oriented band of cirrus clouds, affecting mainly the central islands. The thickest part of the cirrus is about to move over Oahu from the west.
The northerly winds around Kauai have brought in some broken low clouds to the island's north side, while a narrow north to south oriented band of low clouds is about to reach Niihau. On Oahu, the northerly winds have lessen the overcast coverage that had settled in late in the afternoon. What appears to be a patch of mainly mid level clouds is lying over parts of Maui county. Otherwise fair skies ruled the county. Radar is not detecting showers with these clouds. Most of the Big Island is clear except for overcast clouds draped across the Kona and Kau slopes. These clouds extended southward across the adjacent waters between South Point and Captain Cook. Low cloud coverage is scattered at best over the waters north to east of the Big Island for 90 to 130 miles.
Back to the front northwest of Kauai, where satellite is showing an area of dense layered clouds extending to 47000 feet. The area is mostly within 80 miles either side of a line from 30°N 156°W to 26°N 161°W to 24°N 165°W.
Elsewhere, a small cluster of thunderstorms is located about 640 miles south of the Big Island with tops to 47000 feet. This cluster is embedded in a large area of dense layered clouds, roughly 300 miles wide or 150 miles either side of a line from 10°N 146°W to 10°N 156°W to 07°N 163°W. Dense cirrus clouds extended outside this box, grazing southern Big Island at times, and stretching well east of 140°W, south of 20°N. Isolated thunderstorms are also located southwest of this mass, between 08°N 163°W and 05°N 167°W. This cloud mass is due to an upper level trough with the axis extending from 20°N 150°W to 17°N 157°W to 07°N 165°W.