Hawaiian Islands Satellite Interpretation Message
Sun, 14 Nov 2010 18:30:00 -0600
Based on data through 0000 UTC November 15 2010.
Water vapor imagery shows an upper level trough near 30°N 167°W, or about 600 miles east northeast of Midway atoll. This trough is moving to the northeast at 30 mph. The leading edge of a cloud band associated with a cold front extends from 30°N 160°W to 25°N 162°W to 19°N 180°, and is up to 400 miles wide. The overall band is moving to the east at 20 mph east of 170°W, and is nearly stationary west of 170°W. The band is composed of overcast layered clouds east of 168°W, with embedded cumulonimbus clouds extending up to 40000 ft. West of 172°W, the band is composed of overcast cumulus and towering cumulus elements, with cloud tops extending up to 18000 ft.
Farther to the northwest, an area of active cumulonimbus clouds is located near 30°N 176°W, or about 150 miles north northeast of Midway. These clouds are associated with a deep upper low located near 36°N 178°E, or about 600 miles north northwest of Midway. Cloud motion is to the east at 40 mph, and cloud tops extend up to 36000 ft.
Southeast of the main Hawaiian islands, isolated cumulonimbus clouds are located generally south of a line from 10°N 160°W to 17°N 145°W to 10°N 140°W. This area is about 500 miles southeast of the Big Island at its closest point. These clouds are associated with a 50 knot west southwesterly upper level jet. Cloud tops extend up to 46000 ft. This convection is embedded in a larger area of middle and high level clouds that is partially debris from this convection and additional convection upstream in the intertropical convergence zone. Individual cumulonimbus cells are nearly stationary, while the nearby high clouds are moving to the east and northeast at 30 mph.
Near the main Hawaiian islands, a roughly 100 mile wide cloud band is embedded in the low level flow. This band is primarily composed of showery open cell cumulus elements. The leading edge extends from 28°N 161°W to 22°N 158°W to 14°N 150°W, passing across windward sections and coastal waters from Oahu to the Big Island. Individual cloud elements are moving to the northwest at 30 mph, while the overall band itself is moving very slowly to the west.
Going from island to island, scattered to broken low clouds are located over the interior and western sections of Kauai. Broken to overcast low clouds cover the slopes of the Waianae and Koolau ranges on Oahu, and extend 60 miles offshore to the northeast. Broken low clouds cover much of Molokai, and extend 40 miles offshore to the northeast as well as 20 miles offshore to the southwest. Broken low clouds cover the interior of Lanai and the west Maui mountains, and also extend across the auau channel between the two islands. Broken low clouds cover the lower slopes of Haleakala below 8000 ft, and extend 40 miles offshore to the northeast. A band of clouds also extends 20 miles offshore to the west southwest of Ulupalakua, covering northern sections of Kahoolawe.
On the Big Island, broken to overcast low clouds cover much of south Hilo and Puna districts, as well as much of Kau district below 9000 ft. These clouds extend 70 miles offshore to the northeast of the windward coast. Broken to overcast low clouds cover north and south Kona districts south of Keahole Point below 4000 ft, as well as windward slopes of the Kohala range. Scattered to broken clouds also cover the middle slopes of north and south Kona, south Kohala, and Hamakua districts up to 10000 ft.
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