Hawaiian Islands Satellite Interpretation Message
Fri, 31 Dec 2010 12:30:00 -0600
Based on data through 1800 UTC December 31 2010.
Water vapor imagery shows an upper level trough far northwest of the main Hawaiian islands near 29°N 175°W, or about 300 miles east northeast of Midway atoll. This trough is moving east at 30 mph and is bringing a 500 to 700 mile wide swath of mid and high layered clouds. There are isolated embedded thunderstorms located within 500 miles east of the trough axis, with cloud tops up to 45000 feet.
Another upper level trough is located about 700 miles north of the main Hawaiian islands. This trough is moving slowly to the east and the associated flow around the trough is bringing a band of widespread high clouds to the area from near Oahu and Kauai northeast covering much of the area north of 26°N east of 165°W. These high clouds are separated from the lower level stratocumulus by a dry stable layer.
An upper level low is centered about 800 miles south southwest of Honolulu, moving slowly northwest. A few patches of mid and high clouds are found within 300 miles of the upper low, but a more significant area of thunderstorms with tops over 50000 feet is just south of 10°N along the intertropical convergence zone between 153°W and 158°W. These storms appear to be getting some added lift from the upper jet rounding the south and east side of the upper low.
Over the main Hawaiian islands, there are broken to overcast low topped stratocumulus clouds covering the windward coastal waters of all islands, as well as the main channels. The low clouds scatter out over the leeward coastal waters. Broken low clouds covers the windward slopes and coasts of the smaller islands from Kauai to Maui and are over the coasts and up to 5 miles inland over the Big Island from Laupahoehoe to Hilo to the Volcano area to South Point to south Kona district on the leeward side of the island. Low cloud tops across the islands range from 5000 to 7000 feet. Some mid to high level clouds are also skirting the islands from northern Oahu across Kauai channel and covering much of Kauai. These clouds are separate from the lower clouds. Low cloud movement free from terrain is to the west at near 25 mph.
BRENCHLEY
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