Hawaiian Islands Satellite Interpretation Message
Fri, 03 Dec 2010 18:30:00 -0600
Based on data through 0000 UTC December 04 2010.
The remnant of a frontal band has moved south of the main Hawaiian islands. Cloud cover has decreased over most areas around the main Hawaiian islands since this morning, but clouds have increased over the interior and leeward areas of the Big Island of Hawaii.
Low clouds are isolated over Niihau and Lanai. Clouds are scattered over most areas of Kauai, Oahu, Molokai and Maui, but there are patchy broken low clouds over the windward slopes. Overcast clouds blanket most of the Big Island but clouds are scattered over the very summits of Mauna Kea and Mauna Loa and there are only isolated clouds along the coast and lower slopes from 15 miles northeast of Kailua-Kona to Upolu Point. There are scattered to broken high clouds over the islands, but these clouds are quite thin. Radars show numerous light to moderate showers over the windward slopes of the Big Island and only very isolated light showers elsewhere around the main Hawaiian islands.
Low cloud motions near the Big Island are from the east northeast at 25 to 30 mph, slowing to 20 to 25 mph near Kauai. There are only scattered, stable low clouds immediately upstream of the main Hawaiian islands. Cloud cover increases to scattered to broken about 120 miles upstream of the islands.
The trailing end of an old frontal band lies south of a line from 20°N 140°W to 18.5°N 150°W to 20 miles southwest of the Big Island to 60 miles southwest of Kauai where the band becomes partly obscured by higher clouds. The part of the band east of 155°W is 120 miles wide and contains showery broken to overcast low clouds. The part of the old front west of 155°W is a discontinuous band of showery scattered to broken low clouds. The old frontal band has been moving toward the south southwest at 12 mph. A less-well-organized band of showery low clouds is south of a line from 17°N 140°W to 14°N 155°W to 20°N 167°W.
Water vapor imagery, which shows features mainly above 24000 ft, shows a short-wave trough from 31°N 153°W to 28°N 160°W. This trough has been moving toward the south southeast at 30 mph. A low aloft is centered 1235 miles west of Kauai at 20°N 179°W. The low has been moving toward the north northeast at 20 mph and weakening. There are overcast layered clouds and scattered cumulonimbus clouds north of 20°N west of 174°W. A 500 mile wide area of broken high clouds covers the area from 20°N to 27°N between 140°W and 175°W.
DONALDSON
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