Hawaiian Islands Satellite Interpretation Message
Tue, 07 Sep 2010 00:00:00 -0500
Based on data through 0430 UTC September 07 2010.
Broken to overcast low clouds are concentrated over windward, mauka, and upslope areas across the island chain this early evening. This is especially the case on the Big Island, where most sections below 7500 feet are seeing low ceilings. Leeward portions of the other isles are predominantly clear to partly cloudy. Low cloud motion is from the east to slightly north of east at 15 to 20 mph across the aloha state.
An area of showery broken low clouds is upwind from Oahu, Maui county, and the Big Island as of bulletin time, and is moving toward the west and west-southwest with the prevailing trade flow. Plume clouds are generating low ceilings west of Niihau and southwest of Oahu. Low cloudiness collapsing off the Big Island is causing lower ceilings immediately west of that isle. Elsewhere conditions are clear to scattered in the adjacent coastal waters.
An upper low is centered more than 800 miles north-northeast of Honolulu and has been heading west near 10 mph. Another upper low is around 900 miles west-northwest of Kauai and appears to be drifting slowly toward the south or southwest. A trough extends toward the southwest from the second low through 23°N 176°W to 19°N 178°E. The trough has been nearly stationary. Each system is inducing isolated thunderstorms in its vicinity.
Surface troughing far southeast of the Big Island is producing showers and isolated thunderstorms, though the activity remains unorganized. Most of the convection is currently bounded by 17°N 141°W to 10°N 133°W to 08°N 135°W to 07°N 157°W to 16°N 146°W to 17°N 141°W. The feature has been nearly stationary over the past 6 to 12 hours.
KINEL
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