Hawaiian Islands Satellite Interpretation Message
Mon, 27 Dec 2010 06:10:00 -0600
Based on data through 1130 UTC December 27 2010.
The early Monday morning water vapor imagery shows a slow moving upper level trough 850 miles west northwest of Kauai. Using the back edge to the area of multilayered clouds as the trough axis, suggest a slight eastward push of the trough during the past 8 hours. The points of the trough axis are as follows, 30°N 169°W to 24°N 174°W to 15°N 179°W. There appears to be a vort Max at the base of the upper trough at 17°N 177°W. A large pool of multilayered clouds occupies the area between the trough and Kauai, and from 30°N to 10°N.
Several areas of deep convection mark the eastern edge to the area of layered clouds. The first of two areas of cumulonimbus /cb/, thunderstorms, is about 65 miles either side of a line from 29°N 155°W to 20°N 163°W. Cb tops are between 40000 to 45000 feet, with its eastern most edge grazing Kauai county. The island, Niihau, located just southwest of Kauai, is about to experience passing heavy showers and thunderstorms.
The second area has deeper convection with CB tops to 51000 feet. It located just to the south of first, from 20°N 163°W to 15°N 166°W to 12°N 170°W. The width of this area is about 100 miles either side. A separate area of deep convection lies to the east of the second area, between 14°N and 10°N, to 160°W. This mass of clouds has started its northward push towards the main Hawaiian islands. Dense high level cirrus clouds is just reaching the islands as well.
An area of shower bearing low clouds, positioned southeast of the Big Island earlier in the evening, has reach the Kau coast of the Big Island this hour, bringing a few showers to that part of the state. The tops of these showers are between 10000 and 15000 feet. Other than that, remaining smaller islands, and the rest of Big Island, have been pretty much rain free. Low cloud coverage to the east and northeast of the Big Island and Maui consist of several pools of cumulus clouds containing a few showers. More unstable looking shower bearing clouds is located about 370 miles east southeast of the Big Island.
Low level wind flow is mainly southeast and south across the main Hawaiian islands. The speed ranges from 15 to 20 mph over the Big Island end to 20 to 25 mph elsewhere. Last but not least, the area west of the upper trough, which include Midway atoll, is enjoying fair weather with stable, shallow, stratocumulus clouds present.
LAU
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