Hawaiian Islands Satellite Interpretation Message
Sun, 14 Nov 2010 12:30:00 -0600
Based on data through 1800 UTC November 14 2010.
Water vapor imagery shows an upper level trough near 30°N 170°W, or about 500 miles east northeast of Midway atoll. This trough is moving to the east northeast at 25 mph. The leading edge of a cloud band associated with a cold front extends from 30°N 160°W to 23°N 170°W to 19°N 180°, and is up to 300 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 172°W, with embedded cumulonimbus clouds extending up to 40000 ft. West of 172°W, the band is composed of overcast cumulus and towering cumulus clouds, with cloud tops extending up to 15000 ft.
Farther to the northwest, an area of active cumulonimbus clouds is located near 30°N 180°, or about 150 miles northwest of Midway. These clouds are associated with a deep upper low located near 37°N 178°E, or about 700 miles north northwest of Midway. Cloud motion is to the east at 40 mph, and cloud tops extend up to 35000 ft.
Southeast of the main Hawaiian islands, isolated cumulonimbus clouds are located generally south of 18°N between 145°W and 152°W. This area is about 300 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.
Across the main Hawaiian islands, broken low clouds cover the eastern half of Kauai and portions of Niihau. Broken low clouds cover the windward coast of Oahu and windward slopes of the Koolau range. Broken low clouds cover northeast Molokai east of a line from kalaupapa to kamalo, and also leeward sections of Lanai. The west Maui mountains are mostly clear, with broken low clouds across the eastern slopes of Haleakala from keanae to Hana to nuu below 7000 ft.
The Big Island is mostly clear. A 5 mile wide band of low clouds is located just offshore of north Kohala and Hamakua districts. A larger area of clouds covers a portion of eastern Puna district. These clouds are located just offshore of north and south Hilo district, and extend 100 miles to the northeast. Another area of clouds is located just offshore of South Point, and extends 60 miles offshore to the southeast of Kau district.
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