Last Updated on Tuesday, 02 September 2014 09:50
Issued: Sep 02, 2014 2:30 PM HST
Water vapor imagery indicates high pressure aloft over the main Hawaiian islands with a low pressure trough to their west. A low has been cut off from the main trough and is centered near 23°N 179°W with the trough in a northeast to southwest orientation. Associated with this trough are layered clouds to its east. These clouds are bounded by a curve from lisianski island to 24°N 173°W to 22°N 177°W to 25°N 177°W to lisianski island. Otherwise, outside of the inter-tropical convergence zone, ITCZ, and this trough, the upper levels are mostly dry. Along the ITCZ, which has dip south of 10°N, mainly layered clouds have move north of 10°N and remain south of a curve from 18°N 180°W to 10°N 150°W. There are a few cumulonimbus clouds north of 10°N located south of line from 18°N 180°W to 15°N 170°W with storms rising to heights over 52000 feet.
In the mid to lower levels, patches of broken to overcast cumulus and stratocumulus clouds are across the area. The closest area of stratocumulus and cumulus clouds tot he main Hawaiian islands is just east of the Big Island moving to the west around 10 miles per hour. The tops of these clouds are between 9000 and 12000 feet.
Over the main Hawaiian islands at 0000 UTC, Niihau, Maui and the Big Island are mostly cloudy. Kauai is mostly cloudy, except mostly sunny leeward. Oahu is mostly cloudy over the windward slopes and over the Waianae range, otherwise it is mostly sunny. Molokai, Lanai and Kahoolawe are partly cloudy.