Issued: Mar 08, 2014 7:30 PM HST
Based on data through 7:00 pm Mar 08 2014 HST
A northeast to southwest aligned band of broken to overcast, multi layered clouds lingered over the state this Saturday evening. The cloud band, associated with a decaying front and an upper level jet stream, was sitting over the southeast half of the island chain. These clouds were affecting mainly Maui, Lanai and the Big Island.
The east edge of the cloud band extended through 30°N 134°W to 20°N 147°W to 16°N 162°W before becoming diffuse toward Johnston island. The band was just about 375 miles wide near 30°N latitude and narrowed as it continued to the southwest. It was about 225 miles wide over the Big Island and Maui. The cloud band was void of thunderstorms but did contain good amount of showers and was drifting slowly eastward.
The jet stream which was enhancing cloud formation along the weakening frontal boundary flowed from 21°N 153°W to up through 40°N 134°W. The jet was flowing along the east side of an upper trough north of the islands. The trough axis stretched from 36°N 145°W to 29°N 154°W. The trough was swinging rapidly eastward near 60 miles an hour.
Though layered clouds covered much of the southeast half of the state, numerous clusters of broken to overcast low clouds prevailed over the northwest half. These low clouds extended north of the frontal cloud band and southeast of a line from 21°N 166°W to 28°N 145°W. The low clouds seen near Oahu and Kauai were moving southwest within the trade wind flow. The low clouds around Maui county and the Big Island were also flowing southwestward but could not be seen due to the higher clouds above.
At 7 pm, skies over the vast majority of the state was cloudy to mostly cloudy with only a few clear spots popping up here and there. The most cloud free area was over the west and southwest side of Kauai.