Hawaiian Islands Satellite Interpretation Message
Mon, 18 Oct 2010 13:30:00 -0500
Based on data through 1800 UTC October 18 2010.
There has been little change in cloud cover around the main Hawaiian islands since late last night. Skies remain mostly clear over the islands from Niihau to Maui, with only a small patches of broken low clouds over windward Kauai and over east Maui near Hana. Radars show little or no precipitation skies are clear over most of the Big Island of Hawaii also, but there are showery overcast low clouds along the coast and lower slopes of the Big Island from Laupahoehoe to Cape Kumukahi to Apua Point, and stable broken to overcast low clouds over the Kona coast from Kailua-Kona to Keahole Point. There are also thin broken high clouds over the Big Island.
Low clouds around the main Hawaiian islands are moving from slightly south of east at 15 mph. There are only isolated low clouds upstream of the islands from Kauai to Maui. The clouds over the east side of the Big Island are part of a cloud area that extends 50 miles northeast and 80 miles southeast of the island.
A frontal cloud band lines northwest of a line from 35°N 152°W to 500 miles north of Kauai to 31°N 180°W. The part of the band east of 164°W contains deep overcast layered clouds and isolated cumulonimbus clouds, cb, with tops to 35000 ft. The part of the band west of 164°W contains broken to overcast low and middle clouds. The part of the band north of the islands has moved south southeast at 20 mph over the past 12 hours.
Water vapor imagery, which shows features mainly above 24000 ft, shows a low aloft about 900 miles northeast of Hilo near 39°N 148°W with a trough from the low to 100 miles northwest of Kauai to 21°N 180°W. The trough has been moving toward the southeast at 20 mph over the past 12 hours.
A 300 mile wide band of broken to overcast high clouds and isolated cb is centered from 300 miles southeast of Hilo to 13°N 138°W. The band has been moving toward the west at 10 mph and the cb have become more active over the past 12 hours, possibly related to the digging trough described above.
DONALDSON
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