Hawaiian Islands Satellite Interpretation Message
Sun, 07 Nov 2010 12:30:00 -0600
Based on data through 1800 UTC November 07 2010.
Breezy trade winds prevail over the islands this morning, and are bringing a mix of low clouds toward the islands from the east. Cumulus /cu/ and stratocumulus /sc/ coverage over windward waters east of Maui and the Big Island is broken to overcast, and decreases to few to scattered near Kauai and Oahu. Windward slopes of all islands, however, are under broken to overcast low clouds. Leeward areas of the state, including near shore leeward waters, are mostly clear, aside from scattered to broken cu and sc over the Waianae slopes on Oahu. Low clouds near the islands are moving toward the west at speeds near 24 mph.
Despite nearly clear skies over near shore leeward waters, moisture associated with a dissipated front about 100 to 200 miles to the west and southwest of the islands is helping to fuel the development of heavy showers, and isolated thunderstorms, the closest of which is about 130 miles southwest of Niihau. Further west, near 22°N 167°W, scattered thunderstorms are observed along the western edge of the diffuse cloud band that was responsible for delivering showers to the islands the past several days. This band is 200 miles wide, oriented west-northwest to east-southeast, and is moving west, away from the islands. The leading edge of an area of increased, broken to overcast, low clouds is nearing the islands from the east, but this cloud field is dominated by stable sc, and contains fewer showery cu than recent days.
Light winds prevail in the upper atmosphere over the islands, and the pattern aloft near the islands is difficult to decipher from water vapor imagery. Layered mid- and upper-level moisture is in greater supply over the western portion of the state as opposed to the eastern portion. The thunderstorms developing west of the islands appear to be developing in response to a relatively small and weak trough aloft, located along a line from 28°N 170°W to 23°N 167°W to 19°N 164°W.
BIRCHARD
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