This page was last loaded at 6:05 pm HST Dec 7, 2016 (405 GMT Dec 08, 2016)
Issued: Dec 07, 2016 2:30 PM HST
The trade wind flow is largely disrupted across much of the region due to a pair of surface troughs that are being influenced by an upper level trough moving across the western portion of the area.
The upper level trough axis is centered along 30°N 166°W, 21°N 170°W, and 12°N 180° and is traveling to the east around 20 mph. This feature is triggering scattered thunderstorms with tops to 41000 ft within 90 miles a surface trough from 30°N 162°W to 25°N 166°W. The surface trough extends southwestward to 20°N 177°W where it is marked by broken low clouds. The upper level trough is triggering another batch of scattered thunderstorms southeast of Johnston atoll in the area from 17°N to 11°N between 166°W and 170°W. High clouds are streaming northeastward out of this area and are passing over the main Hawaiian islands.
A weak easterly low level flow is in place over the islands, though it is difficult to track individual low cloud motions due to the high clouds passing overhead. Broken low clouds are observed over interior terrain of the smaller islands, since the weak trade wind flow has been overpowered by afternoon sea breezes. Moisture from a weak surface trough stretching over the Big Island is producing more extensive cloud cover over that island, where a few towering cumulus cells rise to around 17000 ft.
The above mentioned surface trough runs from 30°N 148°W, 26°N 150°W, to the Big Island at 20°N 155°W, and 10°N 161°W. Broken low clouds are largely confined to within 75 miles of the trough, while isolated thunderstorms are found near 30°N 148°W.
THIS PRODUCT. FOR QUESTIONS...PLEASE CONTACT TOM EVANS AT
808-973-5273. THE OFFICIAL CHANGE NOTICE CAN BE FOUND AT...ALL
Western Pacific (West of 180)
The Eastern Pacific Hurricane season runs from May 15 to November 30.
Monitored by the National Hurricane Center (NHC)
State of Hawaii Civil Defense
Oahu Civil Defense
Kauai Civil Defense
Maui Civil Defense
Hawaii (Big Island) Civil Defense
Lat/Lon Distance Calculator
Calculate the distance between lat/lon points
Tropical Cyclones Centers Worldwide