Hawaiian Islands Satellite Interpretation Message
Mon, 15 Nov 2010 23:30:00 -0600
Based on data through 0500 UTC November 16 2010.
To the northwest, several cloud bands associated with a series of fronts crossed the northwest Hawaiian islands. The largest cloud band extended across Hawaiian waters within 90 miles of the curve from 20°N 180 to 22°N 175°W to 23°N 171°W to 30°N 166°W and further southwest and north, though additional cloud layers associated with this feature spread up to about 300 miles further southeast from it between 170°W and 160°W. The next cloud band was located within 60 miles of the curve from 25°N 175°W to 30°N 170°W and further north. The last cloud band extended across Hawaiian waters within 45 miles of the curve from 26°N 180 to 28°N 176°W to 30°N 173°W and further southwest and northeast. All these features consisted mostly of dense middle to low cloud layers with embedded towering cumuli and possible thunderstorms, but higher cloud layers also accompanied the primary cloud band. These features all drifted toward the southeast very slowly. Cloud cover between the bands, and especially to the northwest of the third one, consisted mainly of cold-air cumuli.
Water vapor images showed an area of low pressure in the upper atmosphere to the east northeast of the main Hawaiian islands. Layered high to middle clouds wrapping counter-clockwise around this feature mostly obscured lower features east of the curve from 27°N 140°W to 27°N 145°W to 25°N 147°W to 19°N 142°W to 14°N 148°W to 16°N 152°W to 13°N 155°W to 04°N 16°W to 07°N 140°W.
To the south, light thunderstorm activity continued in the ITCZ between 12°N and 07°N. Layered middle to high debris clouds from this and earlier convection partly to mostly obscured lower features within about the same range of latitude.
Otherwise, cloud cover across Hawaiian waters consisted mainly of a layer of marine stratus breaking up into stratocumuli as it encroached from the northeast. The nearly solid overcast was limited to northeast of the curve from 30°N 153 to 25°N 147°W to 20°N 140°W, but arcs of stratocumuli reached as far southwest as the curve from 30°N 159°W to 20°N 154°W to 17°N 140°W. Individual stratocumulus and cumulus fragments occurred further southwest as well. These clouds generally rose to heights of 6000 to 9000 feet, and moved toward the southwest at 15 to 20 miles an hour.
Across the main Hawaiian islands, cloud cover consisted mostly of afternoon cumulus buildups and their layered debris clouds over higher terrain inland, though a few marine cumuli and stratocumuli also moved ashore along slopes facing northeast, and a few thin high clouds passed overhead at times. Areas with the least cloud cover were limited mainly to southwest Kauai, most of Oahu except the Koolau range, the west three quarters of Molokai, northwest Lanai, the central isthmus of Maui, the summit of Haleakala on Maui, the summits of Mauna Kea and Mauna Loa on the Big Island, and the west coast of north and south Kohala districts on the Big Island. These clouds generally rose to heights of 6000 to 7000 feet. Radar data from near the islands showed isolated showers at most.
RYSHKO
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