Hawaiian Islands Satellite Interpretation Message
Fri, 14 Jan 2011 18:30:00 -0600
Based on data through 0000 UTC January 15 2011.
Stability is gradually increasing as ridging aloft builds over the main Hawaiian islands. Meanwhile, a very strong low is affecting Midway atoll and is dragging a front over maro reef.
An extremely strong, low latitude, and zonal, or west to east flowing, west Pacific jet stream is running along 30°N as far east as 170°W, .then turns to the northeast. This jet stream is supporting a storm force low only 600 miles northeast of Midway atoll. Scattered to locally broken cumulus and towering cumulus clouds with tops as high as 22000 ft are racing across Midway from the west in a postfrontal flow. The associated front lies over maro reef about 325 miles southeast of Midway, or 525 miles northwest of Kauai. The ragged front is marked by a 175 mile-wide band of broken layered clouds along 30°N 162°W, 26°N 169°W, and 20°N 180°. To the north of 26°N, isolated thunderstorms rise to 33000 ft along the front, which is travelling to the east at 35 to 40 mph north of 26°N and east around 15 mph to the south.
The main Hawaiian islands lie under a southerly low-level flow ahead of the front. A weak prefrontal convergence band of low clouds has been parked over Kauai through the day, covering the garden isle with broken low clouds. Southerly flow is producing broken low clouds along the south shore of Oahu. Across Maui county, patches of broken low clouds are found across higher terrain. On the Big Island, sea breezes have produced broken low clouds over most low and middle slopes, with the exception of windward Puna. Stability is gradually returning as upper level ridging builds over the islands. Aside from the convergence band near Kauai, few to scattered low clouds are observed across adjacent waters.
DWROE
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