Hawaiian Islands Satellite Interpretation Message
Fri, 21 Jan 2011 12:30:00 -0600
Based on data through 1800 UTC January 21 2011.
Since late last night, cloud cover has increased just east of the windward side of the Big Island of Hawaii and decreased elsewhere around the main Hawaiian islands. Early visible imagery shows broken to overcast low clouds over the east half of Kauai and over central Oahu. There are small patches of broken low clouds over winward areas of east Molokai and east Maui. Clouds are isolated elsewhere from Niihau to Maui. The clouds on Oahu are wave clouds, a series of narrow cloud lines parallel to the Koolau mountains. Broken low clouds cover the Big Island east of a line from Laupahoehoe to Apua Point. Clouds are isolated elsewhere on the Big Island.
Low clouds near the main Hawaiian islands are moving from the east at 18 to 24 mph. There are broken low clouds upstream of the Big Island and Maui and isolated low clouds immediately upstream of the other islands. Radars show isolated light showers upstream of the Big Island and Maui and no precipitation elsewhere near the islands.
There are two frontal cloud bands northwest of the main Hawaiian islands. The older band lies northwest of a line from 30°N 162°W to 25°N 170°W to 21°N 180°W. The band is 180 miles wide and contains overcast layere clouds. Over the past few hours the band has been moving toward the northwest at 5 to 10 mph. The second frontal band is northwest of a line from 30°N 170°W to 26°N 180°W. The second band contains showery broken low and middle clouds with scattered towering cumulus clouds.
Water vapor imagery, which shows features mainly above 24000 ft, shows a trough aloft running from a low at 25°N 141°W to a second low at 11°N 162°W. A ridge aloft runs from 30°N 149°W to 120 miles northwest of Kauai to 18°N 180°W.
DONALDSON
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