Wednesday, November 17, 2010

Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Wed, 17 Nov 2010 06:30:00 -0600

Based on data through 1200 UTC November 17 2010.

To the northwest, a nearly stationary cloud band associated with a front extended across Hawaiian waters within 60 miles of the curve from 20°N 180 to 25°N 165°W to 30°N 162°W and further north. This feature consisted mostly of dense low to middle cloud layers fragmenting into marine stratocumuli. Cloud cover northwest of this band consisted mainly of cold-air cumuli, though streaks of thin high cloud layers passed on a jet stream overhead.

A nearly stationary band of deep layered clouds preceded the main frontal cloud band north of the curve from 30°N 162°W to 24°N 162°W to 19°N 164°W to 18°N 163°W to 27°N 156°W to 30°N 156°W. Scattered embedded towering cumuli and probable thunderstorms rose through the surrounding cloud layers.

Water vapor images showed an area of low pressure in the upper atmosphere to the 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 144°W to 26°N 143°W to 28°N 140°W.

To the south, light thunderstorm activity continued in the ITCZ between 12°N and 07°N, mostly east of 154°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 154°W to 08°N 146°W to 11°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 147°W to 25°N 144°W to 23°N 140°W, but arcs of stratocumuli reached as far southwest as the curve from 30°N 156°W to 24°N 151°W to 16°N 145°W to 18°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 west southwest at around 15 miles an hour.

Across the main Hawaiian islands, middle to high cloud layers associated with the frontal cloud band partly obscured Kauai county and Oahu. Otherwise, cloud cover consisted mostly of marine cumuli and stratocumuli moving ashore along slopes facing northeast, though layered debris clouds from afternoon cumulus buildups over higher terrain on Tuesday still lingered in places, especially along lower to middle slopes of south Kohala district on the Big Island. These lower clouds generally rose to heights of 6000 to 8000 feet. Radar data from near the islands showed scattered showers over the east tip of Maui, and individual heavy showers offshore to the southwest of Niihau and southeast of the Big Island, but isolated light showers at most elsewhere.

Hawaii Infrared Satellite image for 1200 UTC
Central Pacific Infrared Satellite image for 1200 UTC


RYSHKO


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