Hawaiian Islands Satellite Interpretation Message
Thu, 04 Nov 2010 13:30:00 -0500
Based on data through 1800 UTC November 04 2010.
A ragged remnant of a frontal cloud band has stalled across the main Hawaiian islands this morning. This northeast to southwest aligned cloud band consisting mainly of broken to overcast stratus clouds is wide enough to cover most of the area from Kauai to the Big Island, ranging in width from 250 to 325 miles. The southern fringe of the band runs along a line from 40°N 129°W to 27°N 138°W to 17°N 162°W. The front is active north of 29°N, moving east at 20 mph. South of this latitude the cloud band is moving south to southwest aided by the subtropical high building in behind the front. This high which is centered at 33°N 161°W is driving east to northeast winds across most of the central Pacific basin with cloud motions following suit.
Directly north and west of the frontal boundary, broken open-celled stratocumulus and cumulus clouds cover a fairly large area. They extending from the back of the mentioned stratus cloud band to the boundary of a second smaller and weaker front that is located along a line from 34°N 156°W to 28°N 162°W to 27°N 171°W.
Around the main Hawaiian islands this morning, most waters are covered by the broken to overcast stratus band associated with the remnant front. These clouds are moving west-southwest at 20 to 25 mph. Over land, broken to overcast cloud coverage extends onto windward portions of the islands while Kauai, Oahu, Molokai and Lanai are also seeing this cloud coverage across leeward sides as well. West Maui has broken clouds all windward portions up to near 8 kft on Haleakala. Leeward sides of Maui have a few clouds over the western half, but the summit of Haleakala and leeward side of the island are mostly sunny this morning. Downslope and land breezes are keeping bands of clouds off the northeast and southeast shores, but some clouds have built up along the windward side and into the saddle between Mauna Kea and Mauna Loa up to 7 kft in elevation. A few patches of clouds are observed around South Point and Keahole Point, but the rest of the island is mostly sunny.
Elsewhere, water vapor imagery shows a weakening upper level trough hovering near 21°N 179°E. It's currently generating some clusters and strands of broken cirrus clouds from 14°N to 25°N and 168°W to 174°E.
Far south of the Hawaiian islands, a line of scattered showers extends along a line from 07°N 159°W to 12°N 129°W. Thunderstorm tops reach near 47 kft in this area. Another cluster of thunderstorms is bounded between 05°N to 10°N and 163°W to 169°W with tops near 50 kft. Winds generated by the mentioned upper level low near 21°N 179°E are blowing the thunderstorm tops to the north as far as 15°N.
FOSTER
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