Hawaiian Islands Satellite Interpretation Message
Fri, 10 Dec 2010 18:30:00 -0600
Based on data through 0000 UTC December 11 2010.
Water vapor imagery shows a sharp upper level trough over the central Pacific, extending from 30°N 161°W to 22°N 163°W. This trough is moving to the east at 30 mph. An area of high level cirrus and cirrostratus clouds is located just east of the trough. These clouds are located along a strong upper level jet, and are moving to the north northeast at 120 to 140 mph. A large area of deep layered clouds associated with this trough is located generally within 300 to 400 miles southeast of a line from 30°N 155°W to 16°N 164°W, covering much of the main Hawaiian islands. Isolated towering cumulus and cumulonimbus clouds are embedded within the layered clouds, with the strongest convection located along a line extending from 30°N 150°W to 18°N 156°W to 12°N 168°W. Cloud tops with this convection extend up to 48000 ft. North of 22°N, these cells are moving to the northeast at 40 to 50 mph. South of 22°N, these cells are moving to the east northeast at 15 to 25 mph.
Across the main Hawaiian islands, overcast thick layered clouds extend from Oahu to the Big Island, and are moving to the east at 20 to 30 mph. Broken cumulus and towering cumulus clouds are located near Kauai, and extend 50 miles offshore to the west. These clouds are moving to the east and northeast at 10 to 15 mph. Based on cloud motions and the recent convective cloud development around Kauai, it appears that the cold front is located just west of the Kauai coastal waters.
High clouds extend farther east from the area of layered clouds, with patches of cirrus and cirrocumulus north of 17°N extending as far east as 140°W. These high clouds are moving to the east northeast at 50 mph. Below these high clouds, areas of broken to overcast low clouds are located east of 150°W. These clouds are moving to the northwest at 25 mph. North of 18°N, these clouds are primarily stable stratocumulus and closed cell cumulus elements. South of 18°N, these clouds are composed primarily of showery open cell cumulus elements.
To the west of the area of layered clouds, patches of broken low clouds are moving to the southwest and west at 10 to 15 mph. North of 28°N, these clouds are composed primarily of stable stratocumulus elements. South of 28°N, these clouds are a mix of stable closed cell cumulus and showery open cell cumulus elements. A second area of high clouds is located farther west as well, generally west of 173°W and north of 24°N. These high clouds are composed primarily of cirrus and cirrostratus elements, and are moving to the southeast at 80 mph.
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