Hawaiian Islands Satellite Interpretation Message
Sun, 19 Dec 2010 18:30:00 -0600
Based on data through 0000 UTC December 20 2010.
The most noticeable cloud feature in the central north Pacific remains a wedge-shaped area of overcast layered clouds, with embedded cumulonimbus, CB, north of a line from 25°N 140°W to 21°N 155°W to 13°N 161°W to 08°N 180°W. The western edge of this cloud area lies along a line from 24°N 171°W to 18°N 173°W to 11°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 24°N 171°W to 18°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 these CB lie within a ragged 60 to 90 mile wide band from 20°N 158°W to 15°N 161°W to 12°N 173°W to 09°N 180°W. 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 20.2°N 179.9°E, or about 630 miles south southwest of Midway atoll. This system is moving toward the east southeast at about 10 mph, and continues to exhibit tropical characteristics as it moves over warm waters. This system will return into the Central Pacific Hurricane Center area of responsibility by this evening. 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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