Hawaiian Islands Satellite Interpretation Message
Thu, 21 Oct 2010 00:30:00 -0500
Based on data through 0500 UTC October 21 2010.
Since mid-afternoon cloud cover has decreased over the main Hawaiian islands and cloud tops have warmed near the Big Island.
Broken to overcast high, cirrus, clouds cover the central part of the Big Island obscuring lower level features. The cirrus clouds are the tops of cumulonimbus clouds that have collapsed over the past couple of hours. Patchy broken low clouds cover most of the parts of the Big Island not obscured by the cirrus but clouds are isolated near Cape Kumukahi and along the leeward coast. Radars show little precipitation remaining on the Big Island, only scattered light showers along the windward coast. There are patchy scattered to broken low clouds over the smaller islands. Radars show little precipitation around the smaller islands either, only isolated light showers along the windward Maui coast from Hana to Pauwela.
Some broken low clouds that developed over the islands during the afternoon have spread offshore to the west of the Big Island, Maui, and Oahu. Otherwise there are very few low clouds over the coastal waters.
A band of showery broken low clouds, the remnant of a frontal band, is north of a line from 28°N 144°W to 25°N 154°W, 360 miles north northeast of the Big Island, to 25°N 160°W, 200 miles north of Kauai, to 23°N 165°W, to 27°N 169.5°W. The band has remained nearly stationary over the past several hours.
Water vapor imagery, which shows features mainly above 24000 ft, shows a trough aloft from 28°N 140°W, to just southeast of the Big Island, to a low aloft near 14°N 178°W. The part of the trough along 30°N has been moving toward the east at 20 mph, while the part near the islands has been moving southeast slowly. A jet stream associated with the trough runs from 14°N 180°W to 13°N 176°W to 17°N 165°W to 17°N 165°W, 150 miles south of the Big Island, to 25°N 140°W. There are broken to overcast cirrus clouds southeast of the jet. There is also an area of scattered to broken cirrus from 23°N to 27°N between 152°W and 165°W.
DONALDSON
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