Hawaiian Islands Satellite Interpretation Message
Tue, 16 Nov 2010 23:30:00 -0600
Based on data through 0500 UTC November 17 2010.
To the northwest, a cloud band associated with a series of fronts extended across Hawaiian waters within 75 miles of the curve from 20°N 180 to 22°N 176°W to 25°N 166°W to 30°N 162°W and further north. This feature consisted mainly of dense low to middle cloud layers fragmenting into marine stratocumuli, though additional middle to high cloud layers associated with this feature spread up to about 350 miles further southeast from it between 165°W and 159°W. Isolated embedded towering cumuli and probable thunderstorms rose through the lower clouds within the curve from 30°N 163°W to 24°N 168°W to 17°N 164°W to 27°N 159°W to 30°N 159°W. Cloud cover northwest of the band consisted mainly of cold-air cumuli, though a secondary cloud band fragmenting into cold-air cumuli was present within 90 miles of the curve from 28°N 180 to 28°N 175°W to 30°N 169°W.
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 partly to mostly obscured lower features northeast of the curve from 30°N 143°W to 28°N 146°W to 25°N 144°W to 26°N 140°W.
To the south, light thunderstorm activity continued in the ITCZ between 14°N and 09°N, almost entirely east of 150°W. Layered middle to high debris clouds from this and earlier convection mostly to completely obscured lower features east of the curve from 22°N 140°W to 09°N 151°W to 08°N 140°W.
Otherwise, cloud cover across Hawaiian waters consisted mainly of a layer of marine stratus breaking up into stratocumuli as it approached from the northeast. The nearly solid overcast was limited to northeast of the curve from 30°N 150°W to 26°N 147°W to 25°N 140°W, but arcs of stratocumuli reached as far southwest as the curve from 30°N 154°W to 24°N 150°W to 23°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 around 15 miles an hour.
Across the main Hawaiian islands, middle to high cloud layers associated with the frontal cloud band obscured Kauai county completely, and Oahu and Molokai partly. Otherwise, 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. Areas with the least cloud cover were limited mainly to southeast Oahu, coastal Molokai, northwest and southeast Lanai, the central isthmus of Maui, the summit of Haleakala on Maui, and the summits of Mauna Kea and Mauna Loa on the Big Island. These lower clouds generally rose to heights of 5000 to 6000 feet. Radar data from near the islands showed heavy showers offshore to the south of Niihau, and scattered showers over the central Koolau range on Oahu and near Volcano on the Big Island, but isolated showers at most elsewhere.
RYSHKO
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