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Satellite Interpretation Message

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Issued: Aug 31, 2014 7:00 PM HST

Based on data through 7:00 pm Aug 31 2014 HST

Except for the high upper slopes and summits of Mauna Kea and Mauna Loa, the Big Island is blanketed with low cloudiness this early evening. Broken convective low clouds from daytime heating have also been affecting the higher elevations and interior sections of the other isles, though much of this cloudiness has begun to dissipate as the evening hours progress. Low cloud motion is from the east near 15 mph across the aloha state.

A large area of broken low and middle clouds exists in the waters surrounding the Big Island as of bulletin time, and southeast and south of Maui. More broken low clouds are evident north of Maui county, and west and northwest of Kauai. Skies are otherwise clear to scattered over the adjacent coastal waters.

Aloft above 25 thousand feet, a low is more than 1400 miles west of Kauai and has been heading south at 10 to 15 mph. The low is in the base of a trough whose axis extends northeast from the low through 24°N 180° to 30°N 173°W. The trough has been pushing east to southeast near 15 mph. Isolated thunderstorms associated with the system have been igniting from time to time in the area from 23°N to 29°N between 172°W and 179°E. And near the islands, an upper high remains anchored in their vicinity with a vast area of dry air surrounding the feature.

Convection has become more prominent along the intertropical convergence zone far south of Hawaii compared to 24 hours ago. Most of the showers and thunderstorms have been firing from 04.5°N to 10°N east of 161°W, from 09°N to 12°N between 164°W and 174°W, and from 03°N to 06°N west of 175°W.

Hawaii Infrared Satellite image for 0430 UTC