Hawaiian Islands Satellite Interpretation Message
Tue, 16 Nov 2010 12:30:00 -0600
Based on data through 1800 UTC November 16 2010.
Water vapor imagery shows an upper level low north of the area near 34°N 175°W, or about 400 miles north northeast of Midway atoll. This low is moving to the east northeast at 10 to 15 mph. A strong shortwave trough extends from this low to 28°N 165°W, and is associated with a cold front that is located over the northwest part of the area.
The cloud band associated with this front is up to 300 miles wide, and the leading edge extends from 30°N 159°W to 24°N 162°W to 19°N 180°. The band is composed of deep layered clouds east of 165°W. Isolated cumulonimbus clouds are embedded within the layered clouds, with convective cloud tops extending up to 45000 ft. The band is thinner and less continuous west of 165°W, and is composed primarily of cumulus and towering cumulus elements. Isolated cumulonimbus clouds are also embedded within this portion of the frontal band, generally between 165°W and 170°W, with cloud tops extending up to 37000 ft. Additional cumulonimbus clouds are located ahead of the main frontal band, generally between 162°W and 165°W north of 21°N. These cloud tops also extend up to 45000 ft. The overall frontal band is moving to the east at 15 mph, although individual cloud elements are moving to the northeast at 40 mph.
An additional area of active cumulonimbus clouds is located west of the main front, closer to the core of the upper low. These clouds are located near 30°N between 169°W and 173°W, and are moving to the east at 40 mph. Cloud tops extend up to 32000 ft. Otherwise, broken to overcast cumulus clouds are located to the west of the main frontal band. These clouds are moving to the east and east northeast at 40 mph.
South of the main Hawaiian islands, a band of cumulus and towering cumulus clouds extends south and east from the convection west of Kauai. This band runs from 21°N 164°W to 17°N 162°W to 10°N 153°W. The band is composed of scattered to broken cumulus and towering cumulus elements, but with isolated cumulonimbus clouds embedded within the line. Cloud tops have warmed over the past few hours, but earlier this morning tops had extended up to 42000 ft.
Water vapor imagery also shows a second upper low near 23°N 145°W, or about 700 miles east northeast of Hilo. This low is moving to the west at 5 mph. There is an area of cirrus and cirrocumulus clouds northeast of the low, generally between 24°N and 27°N east of 145°W. These clouds are moving to the north and northwest at 20 to 30 mph east of 143°W, and to the west at 15 to 20 mph west of 143°W.
An additional area of cirrus and cirrostratus is located south of the low, generally south of 19°N and east of 150°W. These clouds are moving to the northeast at up to 50 mph.
Across the main Hawaiian islands, scattered to broken cirrus clouds are located near Kauai and Niihau, and are debris from the cumulonimbus clouds located west of the state. At low levels, broken low clouds cover the eastern half of Kauai. Broken to overcast low clouds cover the windward slopes of the Koolau range. Broken low clouds cover eastern Molokai east of a line from kalaupapa to pukoo. Broken to overcast low clouds also cover the interior and windward sections of the west Maui mountains, and lower slopes of Haleakala below 7000 ft from huelo to Hana to Ulupalakua.
The Big Island is mostly clear. Scattered to broken low clouds are located over the windward slopes of the Kohala range. Broken to overcast low clouds are located over eastern Puna district, and extend 60 to 80 miles offshore to the east and southeast. Broken low clouds are located over the Kona coast and lower slopes below 4000 ft, and extend 60 miles offshore to the west southwest, mainly between Keauhou and Milolii.
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