A wave of low pressure will deepen as it tracks along the east coast of the USA this weekend before heading into Atlantic Canada and decaying next week. NS, NB & PEI will be affected later on Sunday and into Monday with the storm depicted in the 985-990mb range at this time; subsequently weakening as it moves towards NL through mid-week.
06z RGEM @ hour 12 / 24 / 36 / 48:
00z GFS total precip @ hour 96:
The passage of this system will finally allow upstream continental ridging to shunt eastward and bring notably warmer conditions next week as another dynamic closed upper low dives SE along the west coast.
00z EPS 500mb height anomalies @ hour 96 / day 4:
00z EPS 500mb height anomalies @ hour 168 / day 7:
The ensuing western trough / eastern ridge configuration could spawn unsettled & potentially severe weather as the trough successively migrates downstream.
00z EPS 500mb height anomalies @ hour 240 / day 10: