Hawaiian Islands Satellite Interpretation Message
Fri, 31 Dec 2010 18:30:00 -0600
Based on data through 0000 UTC January 01 2011.
Water vapor imagery shows an upper level trough far northwest of the main Hawaiian islands near 29°N 173°W, or about 400 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 to areas east of the trough axis, as far south as 25°N. There are isolated embedded thunderstorms located within 100 miles either side of a line from 30°N 163°W to 26°N 167°W, with cloud tops up to 45000 feet.
Another upper level trough is located about 700 miles north northeast 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 just northeast of the islands of Oahu and Maui off to the northeast covering much of the area north of 28°N east of 152°W. These higher clouds are separated from the lower level stratocumulus by a dry stable layer.
A nearly stationary upper level low is centered about 750 miles south southwest of Honolulu. An isolated thunderstorm is on the north side of the low, near 12°N 164°W, but a larger area of thunderstorms with tops over 50000 feet is just south of 10°N along the intertropical convergence zone between 151°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, a somewhat typical trade wind cloud pattern exists, with broken low clouds hugging the lower windward slopes and windward coast of the Big Island. There are also broken low clouds along the lower Kona slopes from 10 miles northeast of Keahole Point to near Milolii. Over the other islands, broken low clouds are confined to the Haleakala slopes, Lanai, the west Maui mountains, the windward tip of Molokai and Oahu from the Koolau mountain crest east to the windward coast. Broken low clouds are also over the windward coastal waters of Maui and Oahu. Low cloud tops across the islands range from 5000 to 7000 feet. Cloud movement free from terrain is to the west northwest at near 20 mph.
BRENCHLEY
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