SATELLITE DISCUSSION

Based on data through 1800 UTC February 11 2016.

Satellite imagery centered over the main Hawaiian islands shows that a trade wind flow prevails this morning. Scattered to locally broken low clouds are currently tracking west-southwestward at speeds between 10 and 15 mph, after moving toward the southwest earlier in the night. Some of the low clouds near the islands are loosely organized into narrow east-northeast to west-southwest oriented bands, with the largest of these bands located near and upstream of Kauai and Oahu.

Despite the prevailing trade wind flow and the presence of clouds over windward waters, most island areas are under mostly sunny skies. Some exceptions include the eastern lower slopes of Kauai, the Koolau slopes of Oahu, and the eastern tip of Molokai, where scattered to broken low clouds are noted. On Oahu, one of the aforementioned narrow cloud lines intersects the southeast side of Oahu, locally increasing the cloudiness from Waimanalo to niu valley to just offshore of kahala.

The tropical central north Pacific /tcnp/ from 10°N to 30°N between 140°W and the date line is dominated by stable low clouds with embedded showery elements, but isolated thunderstorms are noted in the far northeast portion of the area near 25°N 140°W. Nearby, north of 25°N and east of 148°W, broken to overcast high-level cirrus clouds are noted. Water vapor imagery shows that these features are developing in response to a trough aloft that is sharpest north of the area, with the trough axis along a line from 30°N 144°W to 25°N 140°W. Elsewhere, a persistent ridge aloft is centered far southwest of the islands, with an associated ridge extending eastward along 10°N and 12°N. A dry and stable northwest flow aloft prevails over the Hawaiian islands.

Hawaii Visible Satellite image for 1800 UTC

BIRCHARD

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