Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 321 AM EDT Sat Oct 24 2020 Valid 00Z Sun Oct 25 2020 - 00Z Sun Nov 01 2020 ...Heavy rain possible next week... Guidance indicates an upper low developing early next week to the northwest of the area, dropping southward or southeastward or southwestward toward Hawai'i. The 00Z ECMWF was still the farthest west of the deterministic models with this scenario while the Canadian was farthest east. The 00Z GFS/UKMET were in the middle near much of the ensembles, sinking it southward along 160W toward or over Kauai early Thu. With a continuing large east-west spread in the models/ensembles (on the order of 2000+km), prefer to stay in the middle near the 00Z GFS (despite its earlier runs that have not been consistent). This would bring in deep tropical moisture over the island chain (precipitable water values over 2 inches) as early as Tuesday and perhaps continuing through the week into next weekend. Several inches of rain are possible each day in this scenario, depending on where the surface boundary settles. Fracasso