Hawaiian Islands Satellite Interpretation Message
Thu, 30 Sep 2010 07:30:00 -0500
Based on data through 1200 UTC September 30 2010.
Water vapor images showed a broad area of low pressure in the upper atmosphere centered near 26°N 177°W. Although thunderstorm activity under this feature had stopped east of 180, thin layered debris clouds from earlier convection still partly obscured lower features west of the curve from 27°N 180 to 26°N 175°W to 21°N 180. The low and its associated clouds drifted west slowly.
The frontal cloud band formerly located over Hawaiian waters had fragmented to the point where it no longer could be distinguished from the marine stratocumuli located north and southeast of it. Loose bands and clumps of these clouds up to 200 miles wide and 1200 miles long now prevailed north of the curve from 27°N 180 to 19°N 156°W to 19°N 140°W. Individual small cumuli also were present throughout the area. These clouds generally rose to heights of 8000 to 12000 feet, and drifted south slowly.
To the south, light thunderstorm activity continued in the ITCZ between 19°N and 06°N. Layered middle to high debris clouds from this and earlier convection obscured lower features mostly from 19°N to 05°N, and partly as far north as 25°N to the west of 170°W.
Across the main Hawaiian islands, cloud cover consisted mostly of stratus layers and cumulus fragments associated with the former frontal cloud band moving ashore along north slopes. The greatest mass of cloud cover had passed south of Maui county and now approached the Big Island, but the cumuli approaching Oahu showed more vertical development, suggesting stronger showers. These clouds varied considerably in height from 3000 feet to 13000 feet, though the clouds associated with the frontal cloud band more uniformly approached the higher end of that range. Radar data from near the islands showed areas of moderate to heavy rain in the Kauai channel and offshore to the northeast of Oahu, but little precipitation otherwise.
RYSHKO
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