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Satellite Interpretation Message

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Issued: Mar 31, 2015 8:30 AM HST

Based on data through 8:00 am Mar 31 2015 HST

As of 800 am HST, water vapor satellite imagery showed a trough of low pressure in the middle to upper atmosphere extending south from 30°N 158°W to Kauai and Niihau. Plenty of middle to upper moisture was shown streaming northeast ahead of this feature between 20°N and 30°N and from the trough to 140°W. A large area of convection with embedded thunderstorms associated with this upper trough was shown in the visible satellite imagery between 23°N and 30°N from 154°W to 159°W, which was around 200 miles north of Kauai. This area was tracking eastward at 25 to 30 mph.

A band of low clouds associated with a frontal boundary extended west from 28°N 140°W to 28°N 150°W. This band of clouds ranged from 150 to 200 miles wide and was tracking west at 10 to 15 mph. Scattered to broken cumulus and stratocumulus were shown between this band and 13°N from 140°W to 155°W. Broken low clouds were depicted west of the previously discussed area of convection between 25°N and 30°N from 160°W to 180. This cloud coverage was tracking west-southwest at 15 to 25 mph. Elsewhere, scattered cumulus was shown tracking westward around 15 mph within the trades south of the state to 10°N.

Mostly cloudy conditions were shown over Kauai and the western half of the Kauai channel. Cloud tops ranged from 15 to 20 thousand feet, with the highest located just east of Kauai over the adjacent waters. This coverage was moving eastward around 10 mph. Mostly clear conditions were shown over Oahu, Molokai, Maui and the Big Island, with the exception of isolated to scattered low-level cloud coverage focused along the windward sides of each island.

Hawaii Infrared Satellite image for 1800 UTC

Central Pacific Infrared Satellite image for 1800 UTC