Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Mon, 01 Nov 2010 19:30:00 -0500

Based on data through 0000 UTC November 2 2010.

The most noticeable cloud feature in the central north Pacific remains a 90 to 120 mile wide band of broken to overcast low clouds north of a line from 37°N 140°W to 28°N 160°W to 25°N 180°W. This cloud band marks a frontal boundary associated with a deep low in the gulf of Alaska. The band is moving toward the southeast at 10 mph and its leading edge is about 410 miles northwest of the island of Kauai within the main Hawaiian island chain.

Water vapor shows a series of upper troughs and ridges between 10°N and 30°N west of the islands, and an upper low near 21°N 140°W, east of the islands. A 120 to 180 mile wide ragged arc of broken high clouds lies north and west of a line from 26°N 152°W to 23°N 163°W to 18°N 172°W, riding along the northwestern flank of an upper ridge across the islands.

Scattered cumulonimbus, CB, remain active between 08°N and 12°N west of 160°W. The northern edge of associated high clouds reaches as far north as 16°N between 162°W and 176°W. Additional isolated CB lie within a 60 to 90 mile wide arc from 08°N 149°W to 08°N 145°W to 09°N 140°W.

Cloud cover has increased dramatically across the Big Island since this morning, with broken to overcast low clouds covering all but the highest summits this afternoon. Kauai has broken low clouds across its eastern half, while broken to overcast low clouds cover the Koolau and Waianae summits on Oahu. Almost all of Molokai and Lanai lie beneath broken low clouds. Overcast low clouds cover all Haleakala and windward west slopes on Maui, leaving only the saddle clear. In contrast, the area of low clouds across windward waters has mostly dissipated, leaving the Big Island plume extending west from the south Kona shoreline as the most prominent local cloud feature over water. Satellite loop shows low clouds are moving across Hawaiian waters generally toward the west at 10 to 15 mph.

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POWELL

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