Hawaii Extended Forecast Discussion NWS Weather Prediction Center College Park MD 818 AM EDT Tue Oct 30 2018 Valid 00Z Wed Oct 31 2018 - 00Z Wed Nov 07 2018 ...Heavy rain threat ending for Hawai'i over the next day... Upper trough and surface cold front will approach 160W later today which will maintain a moist south-southwesterly flow into the region, especially the western islands. Marginally unstable atmosphere will support embedded convection that will enhance rain rates and could lead to flash flooding where any training occurs. Models take the front into the central islands Wednesday and linger/dissipate it as the upper trough lifts northeastward and heights rise over the state. Rain will taped off and trades will resume late Thursday into Friday and the weekend as precipitable water values drop to under 1.50 inches state-wide (and under 1.25 inches in patches). By Friday into the weekend, ensembles show an upper low detaching from a mid-latitude trough to the northeast of the region near 30N/145W and drifting southwestward to near 153W by late in the weekend. Upper low may then drift back eastward by the end of the period (late next Tuesday). This may bring in some higher chances of rain for the Big Island with a slight increase in moisture and instability and a bit weaker trades over the eastern islands. Fracasso