Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 817 AM EDT Sun Oct 12 2014 Valid 00Z Mon Oct 13 2014 - 00Z Mon Oct 20 2014 ...Possible Late-Season Tropical Cyclone to Affect Hawai'i Next Week... The global numerical models indicate that Hawai'i will remain in the trades until about Sunday October 19 when a cold front settles toward the northern islands. Meanwhile, the guidance continues to depict the emergence of a tropical cyclone from the ITCZ late next week. Both the 00Z/12 parallel GFS and ECMWF track the strengthening low to the south of the state along 14N or 15N. The GFS is more bullish than the ECMWF with rainfall over the islands during the next week, with several inches of QPF in favored terrain. Yesterday's guidance did not introduce the cold front, so expect that the westerlies are probably not sorted properly yet--hence, stay tuned. Cisco