Hawaiian Islands Satellite Interpretation Message
Wed, 13 Oct 2010 07:30:00 -0500
Based on data through 1200 UTC October 13 2010.
Water vapor loop shows an upper level trough just to the east of the Big Island with an axis from 25°N 150°W to 16°N 159°W. Satellite derived winds indicate a 75 mph jet streak on the eastern flank of the trough. An associated surface trough has an axis from 15°N 151°W to 10°N 155°W. This system is producing an area of dense layered clouds with isolated embedded cumulonimbus /cb/ clouds with tops to 45 kft. The clouds are bounded between 08°N to 16°N and to 145°W to 155°W and has decreased in areal coverage over the past six hours. Cirrus clouds from the jet stream run to the northeast of this bounded area.
An area of stratus and stratocumulus clouds are located over the Hawaiian windward and mauka areas and adjacent coastal waters and moving east to west at 10 to 15 mph. These clouds are associated with weak disturbance passing across the state early this morning which is producing occasional showers for the windward sides of the islands. Ir satellite shows most of the clouds and showers concentrated across the smaller main islands at this time. The clouds extend from the islands northward to around 27°N and are bounded at 155°W to the east. Another batch of moisture begins 30 miles upstream of the Big Island is moving from the east towards the windward side. This area of closed cell cumulus clouds is bounded between 20°N to 23°N and 138°W to 155°W and is also traveling to the west at 10 to 15 mph.
Further north is a stationary front is positioned along an axis from 38°N 140°W to 31°N 160°W to 37°N 178°E and is characterized by a 200 mile wide band of overcast stratus clouds. The associated long wave upper trough and mid and high level moisture is producing areas of layered clouds with tops around 30 kft.
Far south of Hawaii in the ITCZ, thunderstorms have decreased over the last six hours. Scattered cb clouds cover an area between 06°N and 14°N along the central Pacific basin. Cloud tops reach to 46 kft in height.
FOSTER
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