Hawaiian Islands Satellite Interpretation Message
Mon, 29 Nov 2010 06:30:00 -0600
Based on data through 1200 UTC November 29 2010.
Thin, broken to overcast high cloudiness, cirrus, remains over the main Hawaiian islands partly obscuring lower level features on nighttime infrared satellite imagery. As far as i can tell from the satellite imagery, radar imagery and surface observations, low clouds are isolated over most areas of the islands.
Satellite loops show only isolated low clouds immediately upstream of the main Hawaiian islands. Low cloud motions east of the Big Island are from the east southeast at 10 to 15 mph backing to east at 20 mph near Kauai. A cloud vortex or spiral is centered 210 miles northeast of Kahului at 23°N 154°W. This feature has been moving slightly north of west at 13 mph. The vortex has weakened quite a bit since last evening. The vortex is now poorly organized and contains only broken low clouds.
Water vapor imagery shows a persistent high amplitude pattern over the central north Pacific with active weather east and west of the main Hawaiian islands. One low is centered 1000 miles west of Kauai at 21°N 175°W. Over the past several hours the low has moved toward the east at 10 mph. There are broken layered clouds from 18°N to 30°N between 165°W and 177°W. A 200 mile wide band of scattered cumulonimbus clouds with tops to 48000 ft is centered from 20°N 169°W to 26°N 171°W.
A second low aloft is centered 520 miles northeast of Hilo at 24°N 148°W. There are scattered towering cumulus clouds, TCU, and isolated cumulonimbus clouds, CB, from 22°N to 27°N between 146°W and 150°W and also within 90 miles of a line from 19°N 144°W to 16°N 145°W to 17°N 151°W. The layered clouds south of 20°N have thinned and the convection in that area has weakened over the past several hours.
There is a ridge aloft between the low west of the main Hawaiian islands and the one to the east. A jet stream curves over the top of the ridge from 12°N 180°W to Kauai to 10°N 140°W. Broken to overcast high clouds south associated with the jet cover the main Hawaiian islands.
DONALDSON
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