Hawaiian Islands Satellite Interpretation Message
Thu, 09 Dec 2010 23:30:00 -0600
Based on data through 0500 UTC December 10 2010.
To the northwest, a complex intersection of several fronts produced a variety of cloud cover across a wide area. Scattered thunderstorms developed within 120 miles of the line from 19°N 169°W to 23°N 157°W. Isolated thunderstorms and towering cumuli also appeared in the relatively clear air within 150 miles of the curve from 27°N 68°W to 19°N 172°W to 16°N 166°W. Associated deep cloud layers obscured lower features north of the curve from 30°N 164°W to 24°N 169°W to 17°N 164°W to 22°N 152°W to 30°N 150°W. Thin high cloud layers also were present in places up to about 250 miles further east. Although the clouds composing this feature moved differently depending on height and location, the feature as a whole drifted southeast slowly.
To the west, marine stratocumuli and low to middle stratus layers organized into weakening and ropy cloud bands associated with fronts. One was located within 60 miles of the curve from 21°N 180 to 23°N 176°W to 23°N 167°W and further west. Another was located within 45 miles of the curve from 17°N 180 to 19°N 177°W to 18°N 174°W to 21°N 168°W and further west. These features drifted south slowly.
To the northeast, marine stratocumuli and low to middle stratus layers also organized into noticeable bands as wind converged along an axis east of the fronts. This area of clouds was located within 75 miles of the curve from 24°N 148°W to 29°N 145°W to 29°N 141°W.
To the south, light thunderstorm activity continued in the ITCZ between 14°N and 07°N. Layered middle to high debris clouds from this and earlier convection mostly to partly obscured lower features from 15°N to 06°N, and merged into the large mass of cloud layers associated with the intersection of fronts further north.
Otherwise, cloud cover across Hawaiian waters consisted mainly of fragmented marine stratocumuli and cumuli, though one large clump of stratus was present in the area east of 143°W and south of 19°N. These clouds generally moved toward the west at 15 to 20 miles an hour, though as they approached the fronts they turned toward the northwest and then the north. They rose typically to heights of 6000 to 9000 feet, though taller cumuli and higher cloud layers approached 15000 feet.
Across the main Hawaiian islands, cloud layers generally in excess of 30000 feet deep obscured lower features almost completely. From the Kauai channel northwest, a large area of merged thunderstorm anvils approached 50000 feet, with a few cloud tops exceeding even that height. Radar data from near the islands showed heavy rain from the Kauai channel northwest, scattered heavy showers well offshore to the southwest through west of Oahu, and isolated heavy showers over north central Oahu, but isolated showers at most elsewhere.
RYSHKO
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