Hawaiian Islands Satellite Interpretation Message
Fri, 01 Oct 2010 13:30:00 -0500
Based on data through 1800 UTC October 01 2010.
Water vapor imagery shows a few different features in the upper levels across the central Pacific basin this morning. The first is north-northwest to south-southwest oriented trough aloft just to the east of the Big Island. This trough has an axis from 26°N 147°W to 21°N 153°W to 13°N 156°W. A few thunderstorms are being generated surrounding the southern base of the trough mostly concentrated between 10°N to 15°N and 149°W to 164°W. A weak upper ridge is present 400 miles to the west of Kauai and both features are nearly stationary. Further to the west lies another upper low with a center near 23°N 179°E. Scattered mid and high level clouds are associated with this system across the northern flank of the low bounded between 24°N to 30°N and 172°W to 178°E.
At the surface, a slow moving weak surface trough in the area continues to induce broken, occasionally overcast, low stratus clouds and scattered light and radar is tracking moderate showers across the main Hawaiian islands and adjacent waters. The surface trough has a north to south axis from 19°N 158°W to 24°N 158°W. Clouds and showers are moving towards the west-southwest on the west side of this axis near 10 to 15 mph while showers east of the axis are nearly stationary or moving to the west at 5 mph.
Over the main Hawaiian islands, broken stratus clouds cover most of the interior with some breaks along the southern coast near Lihue. Oahu is covered in broken to overcast clouds with the exception of a few breaks across metro Honolulu through makapuu. Molokai has overcast clouds over the whole island. Lanai has broken to overcast clouds over the northern half of the island with small breaks over the southern half. West Maui is covered with low clouds while Haleakala and eastern windward slopes are mostly sunny. The Big Island has overcast clouds over Kona, Kohala, Puna and south Hilo districts up to 9 thousand feet. The rest of the island is mostly sunny.
A weak front is more than 300 miles north of Kauai is slowly moving toward the south and southeast. Most of the clouds associated with the system are currently north of a line from 36°N 137°W to 28°N 152°W to 25°N 171°W. The low clouds at the leading edge of the boundary are becoming more diffuse with time.
Far south of Hawaii in the ITCZ, a large area of moderate to strong thunderstorms is bounded between 04°N to 11°N and 170°W to 180°E. Some cells are climbing to over 52 thousand feet in this area. The rest of ITCZ consists of isolated thunderstorms mainly concentrated between 09°N to 13°N.
FOSTER
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