Hawaiian Islands Satellite Interpretation Message
Tue, 28 Sep 2010 13:30:00 -0500
Based on data through 1800 UTC September 28 2010.
Water vapor imagery shows an upper level trough centered near 23°N 171°W, moving west northwest at 20 mph. Another upper level trough is sagging south along 150°W from 24°N to north of 30°N. A southerly upper level jet is positioned east of the first trough and is bringing high level moisture northward from the tropics between 160°W and 165°W south of 22°N.
All of these upper level features are affecting the lower level cloud features as a weak frontal boundary is draped across the region along 25°N. The most active clouds and showers are located on the far west end of the frontal boundary where scattered thunderstorms with tops up to 40000 feet have developed west of 170°W between 25°N and 21°N. The rest of the frontal cloud band that stretches from 26°N 170°W to 25°N 160°W to 25°N 150°W to 30°N 144°W, is about 200 miles wide composed of low topped cumulus locally up as high as 12000 to 14000 feet. This frontal boundary, currently located around 180 miles north of Oahu, is moving south near 10 mph.
Scattered to isolated thunderstorms are found along the southern border of the area south of 13°N associated with the main convergence zone along 09°N-10°N. Highest cloud tops are 50000 feet.
Across the main Hawaiian islands, skies are mainly clear, except for a broken low cloud deck over South Point of the Big Island. Scattered low clouds are found drifting southwest at 5 to 10 mph over the majority of the coastal waters. Locally broken low clouds are seen 10 to 30 miles east of the Puna coastline of the Big Island and up to 50 miles southwest of the Kona coastline of the Big Island.
BRENCHLEY
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