Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 803 AM EDT Thu May 31 2018 Valid 00Z Fri Jun 01 2018 - 00Z Fri Jun 08 2018 A blocky flow regime is expected to remain in place across the central/north Pacific through the next week. An upper trough was initially located several hundred miles west of Hawaii. Models/ensembles show consensus that this feature should become absorbed into another amplifying trough northwest of Hawaii by this weekend. The second trough appears likely to amplify and once again cut off west of Hawaii by Sun, based on the deterministic model/ensemble consensus. Model consensus has improved compared to yesterday, with the consensus now showing the cutoff low approximately 700 miles west of Hawaii by Sunday. At the surface, the implications of this appear somewhat minor, with a strong surface high remaining in place north/northeast of Hawaii through the next week, keeping 15-20 kt surface easterlies in place through much of the next week. The surface high should help to keep the deepest moisture suppressed generally south of Hawaii. Moisture will be sufficient, however, for windward shower activity to persist through the next week. Ryan