Issued: Mar 05, 2015 2:30 AM HST
Overcast layered clouds cover the north Pacific in an area bounded by 40°N 146°W 22°N 138°W 15°N 149°W 18°N 162°W 25°N 155°W 30°N 149°W 40°N 150°W. These clouds cover the eastern half of the main Hawaiian islands, but the western edge of these clouds lies across Maui county and appears to be moving eastward slowly. Radar shows lines of moderate to heavy showers forming within and parallel to northeasterly low level flow across Oahu, Molokai and Maui. Satellite loop shows upper level winds across the islands is southwest to northeast. Water vapor loop shows a pair of short wave troughs across the area. The first trough axis extends through 27°N 165°W and 17°N 157°W while the second axis extends through 35°N 155°W 30°N 145°W. The western upper trough may be triggering the lines of showers across the islands this morning. Both upper troughs are moving eastward at 20 to 30 mph.
A broad anticyclonic circulation persists to the west of the layered clouds. Centered near 40°N 175°W, this circulation has not moved much over the past 12 hours. Another anticyclonic circulation is noted east of the layered clouds, centered near 40°N 133°W.
The view of low clouds is blocked across the Big Island, Maui and adjacent waters. Satellite loop shows northeast winds in the 20 to 25 mph range across local waters around Molokai, Oahu and Kauai. Molokai and Oahu are almost completely covered by overcast low clouds, while Kauai has broken to overcast low clouds across its northeastern half.