Hawaiian Islands Satellite Interpretation Message
Sun, 10 Oct 2010 00:20:00 -0500
Based on data through 0500 UTC October 10 2010.
A loop of the satellite imagery for the past 6 hours of the Hawaiian islands shows an increasing trend in low cloud coverage especially over the windward waters from Kauai to the Big Island. At sunset, the coverage is generally broken there. The low level winds, blowing from east to west, are carrying these clouds onshore thereby causing broken coverage over the windward and mountain areas. Weather radar is also starting to picking up increasing showers with these clouds. Elsewhere, the leeward areas of all islands including the Kona side of the Big Island, has clear skies to scattered low clouds. The leeward waters has mainly scattered low clouds. The low level winds have a speed of 25 to 30 mph.
Outside the main Hawaiian islands, a batch of shower bearing clouds is closing in on the Big Island from the east, where the leading edge of this area is about 100 miles east of Cape Kumukahi. The bulk of the weather however appears to lag further east by 170 miles as noted by some isolated towering cumulus clouds /tcu/. The tcu's are present in the area between 300 and 500 miles east southeast of Cape Kumukahi. This entire area is moving west at 20 mph.
To the north of the main Hawaiian islands, we find a ragged frontal band about 470 miles north of Kauai. The coordinates of this band are from 33°N 140°W to 30°N 151°W to 29°N 160°W. This segment of the band appears stationary and weakening. The front extends further north to a low pressure system in the gulf of Alaska. There is also a stationary line of broken cumulus clouds located to the south of the front from 31°N 144°W to 29°N 150°W to 27°N 157°W.
Far west of Kauai around the dateline, satellite imagery shows an area of deep convection between 23°N and 20°N from 177°W to 177°E. Dense cirrus clouds extends north to near Midway atoll located at 28.2°N 177.4°W.
The intertropical convergence zone /itcz/, contain areas or pockets of moderate to strong thunderstorms. The axis of the ITCZ runs from 08.5°N 140°W to 10°N 165°W to 09°N 180°E. The storms resides within 150 miles either side of the ITCZ.
LAU
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