Hawaiian Islands Satellite Interpretation Message

Hawaiian Islands Satellite Interpretation Message
Sat, 27 Nov 2010 23:30:00 -0600

Based on data through 0500 UTC November 28 2010.

Broken to overcast high, cirrus, clouds cover the main Hawaiian islands and block the view of lower level features on nighttime infrared satellite imagery. Before the high clouds moved over the area visible imagery showed rather sparse low clouds over the islands. There were patchy broken low clouds over the windward slopes of the islands. Low clouds were isolated to scattered over Niihau and Lanai and over leeward areas of the smaller islands. There were broken to overcast low clouds over leeward slopes of the Big Island from Milolii to 15 miles northeast of Kailua-Kona. Surface observations through 700 pm showed little change in low cloud cover since before sunset.

Satellite loops continue to show showery scattered to broken low clouds moving toward the islands from slightly north of east at 25 mph. Radars show moderate showers in these clouds. A few of the showers have been moving over windward areas of the islands but many of them have been sliding past the islands or dissipating just offshore.

Water vapor imagery shows a high amplitude pattern over the central north Pacific with active weather east and west of the main Hawaiian islands. One low aloft is centered 475 miles east northeast of Hilo at 21°N 148°W. Broken to overcast layered clouds and scattered cumulonimbus clouds with tops to 35000 ft cover the area from 19°N to 24°N between 143°W and 149°W. Over the past several hours the low has moved north at 10 mph.

A second low aloft is centered 1100 miles west of Kauai at 24°N 177°W. Over the past several hours the low has moved slowly toward the southeast. A 450 mile wide band of overcast layered clouds and isolated embedded cumulonimbus clouds is west of a line from 30°N 168°W to 19°N 171°W.

There is a ridge aloft between the low west of the main Hawaiian islands and the one to the east. Broken to overcast cirrus clouds are streaming east and southeast over the ridge from the cloud band west of the main islands. The cirrus is in a 450 mile wide band southwest of a line from 250 miles southeast of Hilo to 100 miles northeast of Lihue to 30°N 160°W.

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DONALDSON

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