Issued: Aug 29, 2014 2:30 PM HST
Based on data through 2:00 pm Aug 28 2014 HST
Just about all the islands picked up some clouds as the day wore on, mostly as the result of the trades being light enough, ample low level moisture, and daytime heating. The Kau district of the Big Island is being besieged this afternoon by heavy low clouds, especially the Kau district.just about the only clear areas are along the Hamakua coast including the Hilo area and the northern tip of the island. These clouds extended to the summits of Mauna Kea and Mauna Loa. Weather radar is detecting scattered showers with the clouds over the Kau district and isolated showers from waikoloa to east of Kona airport.
Local cloudiness are being observed with the smaller islands especially along the leeward districts, such as the Waianae district on Oahu, Waimea canyon on Kauai, the south shore of Molokai west of Kaunakakai, the southern tip of Lanai, up country Maui from keokea down to wailea, extending across the channel to Kahoolawe, and the west Maui mountains. These clouds had tops to between 10 and 13 thousand feet.
The satellite imagery shows widely dispersed shower bearing clouds stretched across the windward waters from the Big Island to Kauai. They are being carried southwestward by a northeast wind flow clocked at 15 to 20 mph.
There are three areas of cloudiness on satellite east of the Big Island to 140 west longitude. These areas are areas of troughs, although the one 220 miles northeast of the Big Island has cyclonic circulation. This feature is moving westward slowly. The trough further east, about 650 miles east of the Big Island is also moving westward slowly. The trough 460 miles southeast of the Big Island is nearly stationary.
Widely scattered cumulonimbus clouds /cb/ are present far to the northwest of Kauai, basically north of 28°N between 162°W and the dateline.
Water vapor imagery reveals an upper level low near 28°N 165°W or 550 miles northwest of Kauai. It appears to be drifting toward the west northwest.
A dense area of layered clouds with embedded CB's is located over the tropics about 500 miles south of the Big Island, and is part of the intertropical convergence zone. The clouds are concentrated in an area between 12°N and 08°N from 154°W to 166°W. Highest cloud top is 48000 feet.