Hawaiian Islands Satellite Interpretation Message
Fri, 04 Feb 2011 23:30:00 -0600
Based on data through 0500 UTC February 05 2011.
The evening satellite imagery shows two large scale features in the subtropical Pacific. A cold front 175 miles northwest of Kauai, and an upper level trough about 650 miles east southeast of the Big Island.
The cold front has a 350 mile wide band of clouds and showers. The leading edge is 175 miles northwest of Kauai, and runs from 30°N 156°W to 26°N 160°W to 22°N 165°W to 19°N 170°W to 17°N 178°W. The front continues north to a low pressure system near the Aleutian islands, and beyond the date line for an additional 500 miles. Portion of the front west of 170°W has stalled, while the portion east of 170°W continues to move east at around 10 mph.
Scattered stable low clouds lies between the back edge of the front and Midway atoll located near 28°N 177°W. Just to the west of the atoll is another cold front that is moving east at 35 to 40 mph.
Back to the main Hawaiian islands, the satellite loop shows scattered low clouds south and southeast of the main Hawaiian islands. These clouds are moving towards the islands, along with the southeast to south low level wind flow at 10 to 15 mph. Some of the clouds are dissipating 100 miles south of Oahu, an indication of a ridge of high pressure. Satellite imagery also shows a patch of dense high clouds running ahead of the cold front and passing north of Kauai and Oahu. There is a broken area of mainly mid level clouds that has thicken in the past hour oriented north to south across Maui county. These clouds are advancing towards Oahu. Weather radar is picking up a couple of showers off Hana, moving towards the north. Kauai county has fair skies. As for the Big Island, afternoon clouds still linger over Kau and Kona slopes. The rest of the Big Island is generally fair. There are scattered low clouds, some bearing showers, over the open waters off Kau and Cape Kumukahi, heading towards the Big Island.
Water vapor imagery depicts an upper level low near 13°N 147°W or 685 miles southeast of the Big Island. Layered clouds with embedded cumulonimbus /cb/ clouds are located between 130 and 600 miles southeast quadrant of the low's center. The feature appears to be stationary during the past 6 hours.
LAU
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