Hawaiian Islands Satellite Interpretation Message
Fri, 17 Sep 2010 07:30:00 -0500
Based on data through 1200 UTC September 17 2010.
To the northwest, cloud layers associated with a front sheared apart just northwest of Midway island.
To the west, water vapor images showed a compact center of low pressure in the upper atmosphere near 20°N 180. Isolated thunderstorms and towering cumuli orbited within about 250 miles of the low center, producing limited quantities of layered high to middle debris clouds within that area as well.
To the south, moderate thunderstorm activity continued in the ITCZ between 13°N and 06°N. Layered middle to high debris clouds from this and earlier convection obscured lower features mostly from 14°N to 05°N, and partly from 17°N to the equator.
Otherwise, cloud cover across Hawaiian waters consisted mainly of marine stratocumuli between the ITCZ and the curve from 23°N 180 to 28°N 167°W to 21°N 146°W to 22°N 140°W, though cloud cover further north did fill in somewhat over the past six hours. Individual small cumuli were present throughout the area as well. These clouds had increased in areal coverage, merging into large clumps and areas of nearly solid stratus overcast, especially along 20°N. These clouds generally rose to heights of 6000 to 9000 feet, and moved toward the west at 15 to 20 miles an hour, though close to the frontal cloud band, they slowed, turning around toward the northwest, north, and then the northeast.
Across the main Hawaiian islands, cloud cover consisted mostly of marine cumuli and stratocumuli moving ashore along slopes facing east. Layered debris clouds from afternoon cumulus buildups inland on Thursday had dissipated for the most part, though some still languished in places, especially along lower west slopes of the Big Island. These clouds generally rose to heights of 6000 to 7000 feet. Radar data from near the islands showed scattered showers offshore to the north through northeast of Oahu, but isolated showers at most elsewhere.
RYSHKO
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