Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 721 AM EST Thu Nov 13 2014 Valid 00Z Fri Nov 14 2014 - 00Z Fri Nov 21 2014 A trough amplifying just east of Hawai'i into the upcoming weekend will turn the flow over the islands sharply to the north, bringing an abrupt end to the widespread, heavy shower activity Thursday night into Saturday. By next week, the polar jet flattens somewhat, with a return to much drier easterly winds. Cisco