Hawaiian Islands Satellite Interpretation Message
Fri, 21 Jan 2011 18:30:00 -0600
Based on data through 0000 UTC January 22 2011.
Since this morning cloud cover has increased over Lanai and over leeward areas of the Big Island of Hawaii and Maui. Broken to overcast low clouds cover most lowland areas of the Big Island but clouds are isolated over the Kau desert and around South Point. On Maui, broken low clouds cover the west Maui mountains and the lower slopes of Haleakala with scattered low clouds elsewhere. Overcast low clouds cover the northeast half of Lanai, the east Molokai mountains and the windward side of Oahu from Waimanalo to Laie. Clouds are scattered elsewhere from Lanai to Niihau.
Low clouds east of the Big Island of Hawaii are moving from the east at 20 mph. The low level flow diverges around the Big Island with cloud motions from the east northeast at 25 mph southeast of the Big Island and cloud motions from slightly south of east at 20 mph off the windward sides of the islands. There are broken low clouds upstream of the Big Island and Maui and isolated low clouds immediately upstream of the other islands. Radars show isolated to scattered light to moderate showers upstream of the Big Island and very isolated light showers over water northeast of Molokai and Oahu.
The clouds over the windward side of the Big Island are part of an 80 to 120 mile wide band of broken low clouds northeast of a line from 16°N 150°W over Hilo and Hana to 25°N 158°W to 30°N 157°W. The band has been moving west at 10 to 15 mph.
There are two frontal cloud bands northwest of the main Hawaiian islands, but not the same ones that were there this morning. The older band has remained nearly stationary northwest of a line from 30°N 163°W to 25°N 170°W to 21°N 180°W. The band is from 120 to 180 miles wide and contains broken layered clouds and isolated towering cumulus clouds, TCU. A front farther northwest is dissipating. A fragment of the front, a 70 mile wide band of broken layered clouds and scattered TCU is centered from 30°N 173°W to 28°N 175°W. A newer frontal band is just moving east across the dateline. That 80 mile wide band of broken layered clouds and scattered TCU is northwest of a line from 30°N 179°E to 29°N 180°W. This band has been moving east at 10 mph.
DONALSON
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