Hawaiian Islands Satellite Interpretation Message
Wed, 19 Jan 2011 23:45:00 -0600
Based on data through 0500 UTC January 20 2011.
An upper level low roll across the Big Island earlier today from the north. The low is now located 160 miles southwest of the Big Island at coordinates 16.9°N 156.9°W, moving southwest at 20 mph. Layered clouds and embedded thunderstorms are concentrated within 150 miles northeast of the low and within 200 miles east through southeast of the upper low. The weather has cleared the Big Island, but a layer of broken mid and high clouds remains. Shower activity has diminished over adjacent coastal waters within 45 miles of the Kau coast and South Point.
Heavier thunderstorms are located further southeast of the upper low between 250 and 550 miles. Several storms have cloud tops of 50000 feet plus.
Over other parts of the state, aside for some scattered low clouds over the windward waters, skies are relatively fair. Weather radar did detect a few showers moving through the Kahuku area on Oahu in the past hour. These showers are moving west with a trade wind flow at 15 to 20 mph.
Meshed in with elements of the upper low, is weather associated with a low level trough located 85 miles east of Cape Kumukahi of the Big Island this hour. The axis of the low level trough extends from 24°N 152°W to 19°N 153°W to 16°N 153°W. It appears to be moving west at 15 to 20 mph. Scattered shower bearing clouds are noted from the trough axis eastward for 250 miles.
Elsewhere on satellite, a broken to overcast band of clouds extends from 530 miles north of Kauai to just west of Kauai then curves into the south side of the upper low. The band is between 120 and 140 miles wide. The mid points of the band are, 30°N 159°W, 21°N 162°W, 16°N 162°W and 14°N 157°W. The band is made up of mostly mid level clouds.
Partially mixed in with this band is a stalled frontal boundary extending from 30°N 159°W to 25°N 164°W to 22°N 170°W to 19°N 176°W. The front consist of a band of clouds and showers between 160 to 190 miles wide. The front also extends further north into the Canada and well beyond the date line.
LAU
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