These are NOT the projected lows for Friday morning — add about 10 degrees for that. This is NOAA’s graphical forecast map for Monday morning, behind a strong cold front due to push in Saturday. That front may trigger a few showers and storms, but moisture will be limited, and coverage is likely to be spotty. Before this front arrives, highs may push into the low 80s at Roanoke, and points south and east, today and Friday, with mid and upper 70s common at most other Southwest Virginia locations below 3,000 feet in elevation. Saturday’s front will bring the strongest push of cold air we’ve seen since at least early May. If conditions Monday and Tuesday morning are favorable for radiational cooling — something clouds interrupted on Thursday morning — there may be a few more lows in the 30s west of Roanoke than even the map shows, and possibly even some scattered frost. Though the weather pattern will be slow to make any large changes, the weekend cold front appears likely to be the strongest push of cold air during this particular series of Canadian imports.