Hawaiian Islands Satellite Interpretation Message
Sat, 05 Feb 2011 06:30:00 -0600
Based on data through 1200 UTC February 05 2011.
The early Saturday morning satellite shot of the Hawaiian islands and surrounding waters show two large scale features. A frontal system is located just northwest of Kauai, and an upper level low southeast of the Big Island.
The eastward March of the cold front northwest of Kauai paused for a couple of hours during the evening before resuming its eastward advance. The leading edge of the cloud band, marking the front, is about 55 miles northwest of kauai's na Pali coast at 1 am HST, moving southeast at 15 mph. The front has a 350 mile wide band of clouds and showers. The leading edge of the cold front runs from 30°N 155°W to 23°N 160°W to 22°N 163°W. From this point on the cold fron becomes a stationary front that runs to 19°N 170°W then to 17°N 180°E. The front continues north to a low pressure system near the Aleutian islands, and beyond the date line for an additional 500 miles.
Scattered stable low clouds lies between the back edge of the front to just east of Midway atoll located near 28°N 177°W. Another cold front with a much thinner cloud band will be passing through the atoll momentarily. The front is moving east around 40 mph. The surface low associated with this front is located near 31°N 179.6°E.
Back to the main Hawaiian islands, the satellite loop shows low clouds and showers have increased during the past couple of hours over the waters east to south to southwest of the Big Island. A southeasterly wind flow has carried some of the showers onshore of the Puna district of the Big Island. The tops of the showers extends to 20000 feet, and are moving northwest at 15 to 20 mph.
Aside for a shrinking small patch of low clouds 110 miles south of Oahu, low clouds are dissipating in that area, which is an indication of ridging and subsidence. Otherwise, skies are generally fair island wide.
Water vapor imagery is showing a stationary upper level low near 14°N 147°W or 650 miles southeast of the Big Island. The layered clouds that lies between 160 and 800 miles southeast quadrant of the low has thinned, although a couple of cumulonimbus cloud are still present. There is another upper level low of a smaller scale, located near 25°N 141°W 965 miles northeast of the Big Island. It is moving southwest at 10 mph.
LAU
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