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Satellite Interpretation Message

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Issued: Nov 24, 2014 2:30 AM HST


Based on data through 2:00 am Nov 24 2014 HST


Water vapor images showed a trough of low pressure in the middle atmosphere deepening toward the main Hawaiian islands from the northwest. A cloud band associated with a front supported by the trough was located within 200 miles of the line from 30°N 156°W to 26°N 157°W and further north, and within 75 miles of the curve from 26°N 157°W to 19°N 167°W to 19°N 180 and further west. This feature consisted mostly of deep cloud layers with embedded thunderstorms north of about 26°N 157°W, and middle to low cloud layers from 26°N 157°W to 19°N 168°W, but fragmenting low to middle cloud layers west of 19°N 168°W. This feature moved southeast at 10 to 15 miles an hour. Moderately to densely packed cold-air cumuli prevailed northwest of the band. Bands of cumuli, stratocumuli, and and towering cumuli formed parallel to the main cloud band within about 350 miles to the south of it.

To the northeast, water vapor images showed a shallower trough of low pressure in the middle atmosphere located near 27°N 143°W. Thin high cloud layers associated with this trough partly obscured lower features within 100 miles of the line from 30°N 145°W to 24°N 143°W and further north.

To the south, light thunderstorm activity continued in the ITCZ from 09°N to 03°N, almost entirely west of 168°W. Layered high to middle debris clouds from this and earlier convection obscured lower features partly to mostly from 13°N to 03°N across most of the area, and as far north as 22°N east of 151°W.

Otherwise, cloud cover across Hawaiian waters consisted mainly of loose clumps and streams of marine stratocumuli and cumuli merging into areas of nearly solid overcast east of 152°W. These streams curved from southeast toward the northwest and then the north. Individual small cumuli also were present throughout. West of 160°W, these clouds generally moved toward the west southwest at 15 to 20 miles an hour. These clouds typically rose to heights of 7000 to 10000 feet.

Across the main Hawaiian islands, cloud cover consisted mostly of marine stratus layers and stratocumuli over Maui county, and the main frontal cloud band moving southeast over Kauai county. Layered debris clouds from afternoon cumulus buildups on Sunday largely had dissipated. These clouds generally rose to heights of 7000 to 10000 feet, though the layers of the cloud band approached 15000 feet. Radar data from near the islands showed areas of rain over and southwest of the Alenuihaha channel, over and southwest of Kauai county, and offshore well to the northeast of Maui. Elsewhere, radar data showed isolated showers at most.

Central Pacific Infrared Satellite image for 1200 UTC


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