Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 828 AM EDT Sun Jul 29 2018 Valid 00Z Mon Jul 30 2018 - 00Z Mon Aug 06 2018 The guidance continues to advertise a break in the ridge as a weakness slides westward through the Hawai`ian island chain by Friday. Timing remains an issue here with the 00Z CMC a bit more sluggish to advance the feature toward the region. By the end of the weekend, models agree on tucking this feature underneath an anomalous 597-dm mid-level ridge across the mid-latitudes of the Central Pacific. At this point, the 00Z ECMWF jumps ahead of the pack although does have ensemble support from its own suite. At the surface, mean ridging remains fixed over the northeastern Pacific early in the period with another anticyclone forming just east of the International Dateline by mid-week. This will reinforce the climatological trades with an uptick in the strength of the wind fields from mid-week onward. Some solutions favor sustained winds exceeding 25 knots at times. Overall rainfall chances should be regular given the enhanced flow coupled with above average precipitable water values, generally in the 1.50 to 1.75 inch range. Further, there may be an uptick in convective coverage as the remnants of Tropical Depression Gilma crosses the region. Rubin-Oster