Hawaiian Islands Satellite Interpretation Message
Sun, 19 Dec 2010 12:30:00 -0600
Based on data through 1800 UTC December 19 2010.
The most noticeable cloud feature in the central north Pacific is a wedge-shaped area of overcast layered clouds, with embedded cumulonimbus, CB, north of a line from 25°N 140°W to 22°N 156°W to 14°N 163°W to 08°N 180°W. The western edge of this cloud area lies along a line from 28°N 168°W to 20°N 172°W to 10°N 180°W. A 180 mile wide band of broken to overcast layered clouds extends west from the main cloud area, mainly north of a line from 28°N 168°W to 20°N 180°W, wrapping cyclonically toward a low just west of the dateline.
Cold convective cloud tops, likely CB, lie along the eastern edge of the main cloud area south of 20°N. The bulk of this CB lie within a 60 to 90 mile wide band from 20°N 159°W to 15°N 163°W to 12°N 174°W to 09°N 180°W. Isolated CB lie farther to the north and east, affecting the western half of the main Hawaiian islands. These CB are moving toward the northeast at about 15 mph.
Satellite loop shows the subtropical ridge lies just southeast of the overcast layered cloud area, with an axis extending roughly through 22°N 140°W and 16°N 160°W. Moderate trade flow is noted south of the ridge within scattered to patchy broken low clouds.
Broken to overcast layered clouds cover all of the main Hawaiian island chain, blocking the view of low clouds there.
Elsewhere, a gale low was located just west of the international dateline near 20.5°N 179.2°E, or about 610 miles south southwest of Midway atoll. This system is moving toward the south at less than 10 mph, and continues to exhibit tropical characteristics as it moves over warmer waters. This system is maintaining a persistent ring of thunderstorms surrounding its well defined center. Forecast models indicate this system will turn back toward the southeast or east today, which will likely bring it back into the Central Pacific Hurricane Center area of responsibility later today or tonight. For additional information on this gale low, see the high seas forecast issued for the north Pacific ocean by the National Weather Service forecast office in Honolulu, Hawaii under AWIPS header hsfnp, or WMO header fzpn40 PHFO.
POWELL
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