SATELLITE DISCUSSIONBased on data through 1800 UTC April 30 2016.
An upper level trough, with the axis extending from 42°N 150°W to 31°N 151°W and then tapering through 20°N 180°W, is supporting a 200 mile wide overcast band of layered clouds along a front from 40°N 145°W to 29°N 160°W to 26°N 180°W. The band, south of 30°N is nearly stationary and is carrying clouds tops generally less than 20 thousand feet.
The remainder of the area is being controlled by surface ridging, with scattered to broken stratocumulus /sc/ and cumulus /cu/ primarily moving to the west between 15 and 25 mph.
Over the Hawaiian islands this morning, showery broken low clouds are banked along the north and east slopes of Maui through Kauai. Over the eastern side of the Big Island, broken to overcast low clouds are along the mountain slopes from Upolu Point to Cape Kumukahi to South Point. The western slopes on the Big Island only have very few clouds. The remaining areas on the smaller islands have scattered low clouds. Upstream or east of the islands, the scattered to broken sc and cu mentioned above are moving toward the state between 15 and 25 mph.