Hawaiian Islands Satellite Interpretation Message
Wed, 06 Oct 2010 19:30:00 -0500
Based on data through 0000 UTC October 07 2010.
Water vapor imagery shows an upper level ridge just north of the main Hawaiian islands. An upper level low is located near 20°N 180°, or about 600 miles south southwest of Midway atoll. This low is moving to the west at 20 mph. Isolated cumulonimbus clouds are located within 150 miles of the low. Cloud tops extend up to 38000 ft.
The leading edge of a dissipating frontal cloud band extends from 30°N 156°W to 25°N 180°, or from 600 miles north of Honolulu to 250 miles south southwest of Midway atoll. This band is up to 150 miles wide and is nearly stationary. However, individual cloud elements are moving to the west at 15 to 20 mph west of 170°W.
An area of showery clouds is located between 300 miles and 600 miles west southwest of Honolulu, centered near 19°N 165°W. This area of clouds is composed primarily of cumulus and towering cumulus elements, with embedded cumulonimbus elements. Cloud tops extend up to 35000 ft. These clouds are moving to the west at 20 mph.
Across the main Hawaiian islands, broken low clouds cover the interior of Kauai and Niihau, and extend 20 miles offshore to the southwest. Broken to overcast low clouds cover the slopes of the Waianae range on Oahu, and extend 30 miles offshore to the southwest. Scattered to broken low clouds are located over the Koolau range. Broken low clouds cover Molokai east of kamalo and southwest of maunaloa. Broken low clouds cover leeward Lanai, generally southwest of Lanai city. Scattered to broken low clouds are located over the west Maui mountains. Broken to overcast low clouds cover southeastern slopes of Haleakala from Hana to kaupo to Ulupalakua below 6000 ft.
On the Big Island, broken clouds cover the windward slopes of the Kohala range, as well as much of north and south Hilo and Puna districts below 7000 ft. Broken to overcast clouds cover Kau district below 8000 ft, and extend 30 miles offshore to the south and southwest. Broken to overcast clouds also cover north and south Kona districts below 7000 ft south of Keahole Point. Scattered to broken clouds are located over the rest of north Kona district as well as leeward sections of north and south Kohala districts. The interior of the Big Island is mostly clear, except for an area of broken clouds over leeward slopes of Mauna Kea between 7000 ft and 10000 ft.
Patches of broken low clouds are located upstream to the east and northeast of the main Hawaiian islands. These clouds are a mix of stable closed cell cumulus and showery open cell cumulus elements. They are greatest in coverage north of 20°N east of 150°W, and between 24°N and 27°N east of 162°W. A surface ridge is located generally between 26°N and 28°N. South of the ridge, cloud motion is to the west at 10 to 15 mph. North of the ridge, cloud motion is to the north and northeast at around 10 mph.
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