Hawaiian Islands Satellite Interpretation Message
Sat, 20 Nov 2010 06:00:00 -0600
Based on data through 1130 UTC November 20 2010.
A weak surface trough remains over or just east of the island chain this early morning, and appears to be moving slowly east. Low ceilings and rain continue to affect portions of the Big Island, especially in the Puna and Hilo districts. Scattered to broken low clouds have been impacting Maui and Molokai, while low ceilings have been prevalent in eastern parts of Oahu, including coastal areas and the Koolau range. Elsewhere skies are clear to partly cloudy, discounting high-cloud ceilings over Kauai and its adjacent waters. Low clouds are moving from the north to northeast at 10 to 15 mph from Kauai to Maui, and from the east near 10 mph east of the Big Island. Low level flow appears to be light and variable over the island of Hawaii itself.
Broken multilayered cloudiness and showers remain just north- northeast of the Big Island, as was the case last evening. Small areas of scattered low clouds and isolated showers are otherwise randomly dispersed throughout the coastal waters.
A cold front is approximately 1000 miles northwest of Kauai and has been heading toward the east near 30 mph. High clouds riding over the top of the surface boundary have been filling the skies from the front eastward to Kauai and its adjacent waters. As the front approaches Midway atoll, winds at the site have been from the southwest between 15 and 20 mph. Low ceilings have also been on the increase in the area.
Another weak surface trough is about 500 miles southeast of the Big Island and has been pushing west slowly. The system has been inducing showers and isolated thunderstorms within 60 miles either side of a line from 21°N 146°W to 18°N 146°W to 17°N 148°W to 14.5°N 149.5°W. Farther south, convection is firing along the intertropical convergence zone. Most of these showers and thunderstorms are located from 07°N to 13°N between 141°W and 157°W. More activity is found from 07°N to 11°N between 138°W and 141°W, and from 06°N to 09°N between 157°W and 161°W.
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