Hawaiian Islands Satellite Interpretation Message
Fri, 19 Nov 2010 06:30:00 -0600
Based on data through 1200 UTC November 19 2010.
Water vapor imagery shows a longwave upper level trough with an axis from 46°N 180°E to 30°N 162°W to 21°N 166°W. West of the axis, a 135 mph east to west oriented jet streak runs along the southern flank of the upper low according to satellite derived winds. A wide band of broken cirrus clouds accompany the jet which mainly covers between 25°N and 38°N and west of 168°W.
Shortwave energy persists directly on the eastern side of the base of the trough which is currently moving across Oahu and Maui county. East of the trough, a weak ridge persists with an axis from 33°N 149°W to 22°N 149°W. Another trough is then located east of that ridge from 31°N 137°W to 22°N 136°W. All of these upper level features are in a line between 20°N to 40°N and moving east at 25 to 30 mph.
A cold front extends from 30°N 155°W to 21°N 157°W to 20°N 161°W and is currently advancing eastward at 15 mph across the Kaiwi Channel and Molokai this morning. Along the front, a 200 mile wide line of scattered thunderstorms and heavy showers covers the smaller main Hawaiian islands from the Alenuihaha channel to Kauai and further westward. Clouds in this vicinity are overcast and layered with embedded towering cumulus with tops as high as 30 kft. A stronger thunderstorms cell is 50 miles northeast of Kauai and has tops to 45 kft. Across the Big Island, broken cumulus with isolated towering cumulus clouds most of the island interiors and coastlines. Showers have popped up over the Kohala and north Kona coast this morning.
Elsewhere, a slow moving cold front runs from 29°N 166°W to 21°N 174°E. This front is characterized by a 150 mile wide band of overcast stratus clouds.
FOSTER
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