Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 754 AM EDT Mon Mar 30 2015 Valid 00Z Tue Mar 31 2015 - 00Z Tue Apr 07 2015 Both the GFS and ECMWF indicate that Hawai'i will remain near the 700 mb ridge axis for the next week, with the northern islands in westerlies at that level and the southern islands in easterlies. The zonal ridge position will tend to keep the heaviest rainfall away from the state. Cisco