A moisture starved system will trigger light snow showers while it crosses the Great Lakes Wednesday night and lifts into the Northeast on Thursday.
Enhanced precipitation totals are expected downwind of the Lakes... and a surface low deepening off the New England coast should wrap enough Atlantic moisture inland to clip Maine with accumulating snows before the system exits into the Canadian Maritimes early Friday.
A rich supply of Gulf moisture...combined with energy aloft...should support showers containing moderate to locally heavy rains across South Texas.
Farther east...persistent easterly/southeasterly flow will continue to foster light shower activity over Florida and up into the coastal region of the Carolinas.
Out west...a slug of Pacific moisture overrunning a frontal boundary will bring widespread moderate to heavy precipitation into British Columbia. Although the bulk of the significant activity will stay north of the Canadian border...some light rain and snow could reach into the extreme northwestern corner of Washington state.