Issued: Jul 26, 2016 8:30 AM HST
Infrared satellite imagery from this morning shows a surface trough running from 30°N 155°W to 23°N 166°W, or about 250 miles northwest of Kauai. This trough is associated with the remnants of former tropical cyclone Darby and is marked by a 150 mile wide area of layered clouds. An upper level trough is helping to support an area of towering cumulus /tcu/ with clouds tops to 35 thousand feet near 26°N 161°W. Between 28°N 158°W and 32°N 153°W the upper trough is also supporting an area of mid to upper level clouds, moving to the northeast around 30 mph.
A broad area of stable stratocumulus /sc/ is pushing in from the east and extends as far west as 150°W, north of 18°N. Cloud tops in this region are no taller than 8 thousand feet. A weak intertropical convergence zone /itcz/ is producing isolated convection along 13°N, .between 130°W and 161°W. Elsewhere in the area the scattered cumulus /cu/ and sc are predominately moving to the west near 20 mph, except near the main Hawaiian islands where the surface trough mentioned above is veering the flow over the islands out of the east-southeast.
The far eastern portions of Kauai Molokai and Maui have areas of broken low level clouds. The remaining areas on these islands are clear. The Koolau mountain range on Oahu has broken low level clouds , with a broken area of cu/sc extending 40 miles northeast of the coast. This area of cu/sc is moving to the west- northwest near 20 mph. Lanai has few clouds skirting the northern most coast this morning, with all other areas being clear. On the Big Island, scattered to broken clouds linger over Cape Kumukahi from Hilo to Apua Point in the Puna district. A thin, 20 mile wide band of clouds, approximately 15 miles east of Cape Kumukahi is moving to west at 20 mph. Broken to overcast clouds linger along the lower slopes in the south Kona district. There are few clouds along the northeast coast in north Kohala. All other areas on the Big Island are clear.