Hawaiian Islands Satellite Interpretation Message
Thu, 09 Sep 2010 07:30:00 -0500
Based on data through 1200 UTC September 09 2010.
Water vapor imagery shows an upper level low centered near 25°N 178°W, moving west at 20 to 25 mph. A large area of scattered thunderstorms is within 300 miles either side of the low and is affecting the far northwestern Hawaiian island chain from Midway atoll to near laysan. Highest cloud tops are near 45000 feet in this area. An upper level jet to the south and southeast of the upper low is spreading copious amounts of high level moisture in the form of layered cirrus from the tropical convergence area near 10°N between to dateline and 160°W to the northeast across johnson island and across the Hawaiian islands between Kauai and French Frigate Shoals. An upper ridge appears to dominate the area from the eastern main Hawaiian islands east to 140°W.
A weak disturbance located about 750 miles southeast of the Big Island is triggering an area of isolated to scattered thunderstorms with tops over 50000 feet. Isolated to scattered thunderstorms are also found near the intertropical convergence zone from about 158°W extending westward to the dateline and reaching as far north as 13°N. Elsewhere across the central Pacific region, extensive broken to overcast low topped stratocumulus covers the area from 300 to 1000 miles northeast of the main Hawaiian islands, with more scattered to broken low cloud decks within 300 miles of the main Hawaiian islands.
Specifically across the main islands, broken low clouds cover the leeward Big Island coast from Keahole Point southward across the south Kona district, and on the windward side of the Big Island from Puna district across Hilo and north to Upolu Point. These clouds extend across the windward Big Island waters and into the eastern portion of the Alenuihaha channel. Broken low clouds are found on the windward and leeward slopes of Haleakala and on the northeast side of Molokai. Broken low clouds are found over the Koolau mountains of Oahu and these extend across central Oahu into the north slopes of the Waianae range. More extensive low clouds appears to be over the island of Kauai, although high clouds are obscuring the satellite view of the lower cloud decks. Cloud tops are near 9000 feet and are moving southwest at 15 to 20 mph.
BRENCHLEY
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