Hawaiian Islands Satellite Interpretation Message
Tue, 28 Dec 2010 12:30:00 -0600
Based on data through 1800 UTC December 28 2010.
Water vapor imagery shows an upper level low near 16°N 173°W, or about 900 miles south southeast of Midway atoll. This low is moving to the east southeast at 20 mph. The low is part of a longwave trough that extends north through 30°N 169°W. Broken to overcast layered clouds are located east of the trough, generally between 153°W and 169°W. These clouds cover much of the main Hawaiian islands. Additional cirrus clouds extend farther east from the main area of clouds, with scattered to broken high clouds extending as far as 148°W. Isolated cumulonimbus clouds are embedded within the layered clouds. Cloud tops extend up to 40000 ft.
Farther east, areas of low clouds are embedded within a returning trade wind flow. Based on low-cloud motions, a surface ridge is located from 28°N 140°W to near 26°N 150°W. North of 24°N, clouds are broken to overcast in coverage and are composed primarily of stable closed cell cumulus elements. South of 24°N, clouds are generally scattered to broken in coverage and are composed primarily of showery open cell cumulus elements. North of the ridge, cloud motions are to the north and northeast at 10 to 15 mph. South of the ridge, cloud motions are to the west and northwest at 10 to 15 mph. South of 22°N, cloud motions are to the west at 25 to 30 mph.
Across the main Hawaiian islands, broken to overcast layered clouds cover much of the state, obscuring low cloud features. A band of towering cumulus clouds embedded within the layered clouds is located just south of Oahu. Cloud tops within this area extend up to 25000 ft. This band is generally 20 to 30 miles wide, and extends from between diamond head and Makapuu Point on Oahu to 150 miles offshore to the south. These clouds are moving to the north northeast at 20 mph.
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