Hawaiian Islands Satellite Interpretation Message
Tue, 18 Jan 2011 23:30:00 -0600
Based on data through 0500 UTC January 19 2011.
The satellite imagery shows a complex pattern around and in the vicinity of the main Hawaiian islands this evening.
Satellite water vapor imagery shows an upper level low about 230 miles northeast of Maui. It is marked by a patch of middle and high clouds on infrared northeast of Maui. The low has ease on down from the north northwest during the past 24 hours.
A large patch of dense middle and high clouds lies over a good part of the main Hawaiian islands, affecting the area west of Maui. The clouds extend to 600 miles north of Oahu, to 450 miles west of Kauai, and to 170 miles south of the Big Island. The clouds are showing signs of spreading onto the Big Island from the west during the past hour.
This patch is attach to a northeast to southwest oriented frontal band. The leading of this band marks the position of the cold front. A 600 pm HST the coordinates of the front are as follows, 30°N 161°W 28°N 162°W 24°N 170°W 19°N 180°E. The front extends to the north, to the Aleutian islands and well to the southwest, west of the dateline. The band has a width of 250 miles containing clouds and showers. The front is moving east and southeast at 20 mph.
About 200 miles east of the Big Island, is an area of unstable weather consisting of layered clouds and embedded thunderstorms. The clouds and storms are located on the east side of the upper low. The weather is concentrated in an area about 500 miles wide.from 152°W to 144°W, and 1000 miles long from 26°N to 13°N. Surface analysis shows one or two low level troughs involved. There are no signs the area is moving westward.
Weather radar shows scattered showers over Puna and Hilo districts and their adjacent waters of the Big Island. Isolated heavy showers are also popping up along the Hamakua coast towards Honokaa. Elsewhere, there are areas of light rain precipitating from the dense layered clouds west of Maui. The valley isle itself is mostly clear this hour.
LAU
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