Hawaiian Islands Satellite Interpretation Message
Sat, 13 Nov 2010 12:30:00 -0600
Based on data through 1800 UTC November 13 2010.
A highly amplified jet stream dominates over the central and north Pacific. Strong high pressure at the surface and aloft centered far northeast of the area gives way to a deep upper level trough near the date line extending south to 25°N.
The upper trough is supporting a surface cold front 700 miles northwest of Kauai that is advancing to the east near 15 mph. The front is marked by a 250 mile-wide band of overcast layered clouds centered along 30°N 169°W, 25°N 174°W, and 23°N 180°. Isolated thunderstorms embedded within the front north of 25°N rise to 44 kft.
The front has displaced the subtropical ridge southward to about 350 miles northeast of Kauai. Easterly trade winds are noted in low cloud motions of 20 to 25 mph, though cloud motions veer out of the east southeast just north of the state.
Low cloud coverage follows a typical windward and mauka pattern over much of the main Hawaiian islands this morning. Patches of broken low clouds are confined to windward slopes of Maui, Molokai, and Oahu, while a small band of broken low clouds is producing a greater amount of low clouds over the eastern half of Kauai and its adjacent waters. Few to scattered low clouds are moving across windward waters ahead of a 150 mile band of broken cumulus clouds sitting 100 miles off the windward coasts.
A band of high clouds is obscuring much of the Big Island this morning. The 300 mile-wide high cloud band is being generated by a sharp upper level trough centered from 10°N 177°W to 10°N 160°W then running over Maui and ending at a weak upper low near 26°N 150°W. The upper trough is moving to the southeast slowly and is triggering isolated thunderstorms with tops to 42 kft about 75 miles south of the Big Island from 18°N to 16°N between 158°W and 153°W. Isolated thunderstorms also rise as high as 47 kft south of 14°N between 174°W and 161°W.
Far southeast of the state, a portion of the ITCZ east of 147°W has lifted north of 10°N, reaching 13°N.
DWROE
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