Hawaiian Islands Satellite Interpretation Message
Mon, 29 Nov 2010 23:30:00 -0600
Based on data through 0500 UTC November 30 2010.
Water vapor images showed a broad center of low pressure in the upper atmosphere near 22°N 175°W, or about 1000 miles east of Kauai. Deep cloud layers swirled counter-clockwise around the low center, obscuring lower features north of the curve from 26°N 180 to 23°N 175°W to 21°N 180 to 20°N 168°W to 23°N 162°W to 28°N 166°W to 30°N 166°W. Scattered thunderstorms also developed southeast of the low within 120 miles of the curve from 26°N 174°W to 23°N 171°W to 19°N 171°W. This feature as a whole remained nearly stationary.
Water vapor images also showed a weak and diffuse trough of low pressure in the upper atmosphere near 24°N 147°W. Isolated towering cumuli and possible thunderstorms formed under this feature within 60 miles of the curve from 27°N 149°W to 20°N 150°W. Deep layered debris clouds from earlier convection partly to mostly obscured lower features to the east between 150°W and 140°W.
To the south, light to moderate thunderstorm activity continued in the ITCZ between 14°N and 07°N, mostly west of 150°W. Deep layered debris clouds from this and earlier convection partly to mostly obscured lower features within the same range of latitude. However, between 174°W and 150°W, more extensive deep layered debris clouds flowed north under the influence of the low aloft as described in the first paragraph above, mostly to completely obscuring lower features as far north as 20°N.
Otherwise, cloud cover across Hawaiian waters consisted mostly of stratocumulus and cumulus fragments up to about 150 miles across. These clouds generally rose to heights of 6000 to 9000 feet, and moved toward the west southwest at 15 to 20 miles an hour, though west of 170°W they moved toward the northeast to north.
Across the main Hawaiian islands, layered high clouds from the south obscured the Big Island mostly, and the other islands partly. Lower cloud cover consisted mainly of afternoon cumulus buildups over higher terrain inland, though a few marine cumuli also moved ashore along slopes facing east. Areas with the greatest low cloud cover included north central Kauai, both mountain ranges on Oahu, west Molokai, most of Lanai, and west slopes of Haleakala on Maui. These clouds generally rose to heights of 5000 to 7000 feet. Radar data from near the islands showed scattered showers over the Koolau range on Oahu and along the northwest coast of the Big Island, but isolated showers at most elsewhere.
RYSHKO
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