I believe NWS updated this:
LONG TERM /MONDAY THROUGH FRIDAY/...
...SIGNIFICANT LAKE EFFECT SNOW EVENT CONTINUES TO LOOK FAVORABLE BY
MID WEEK...
An Arctic cold front will cross the region for Tuesday. As such,
cold air will rapidly pour into the area causing the ongoing rain
showers from Tuesday morning to abruptly transition over to snow
showers as we head into Tuesday afternoon.
Winds shifting to westerly at 850 mb through the night on Tuesday
into Wednesday will advect cold air into the region, causing the 850
mb temperature to drop to around minus 20C. In addition, multiple
parameters are stacking up, from good over-lake instability,
available moisture, and positioning of the upper and lower level
features suggesting for a strong lake response off both Lake Erie
and Lake Ontario beginning Tuesday night continuing into most of the
day on Wednesday. As per usual, there is some uncertainty regarding
the exact positioning of the lake effect bands, however the lower
resolution models are suggesting winds to be generally
westerly/southwesterly for most of this time period before veering
northwest near the end of the event.
High pressure will pass through the region for Thursday into Friday,
lowering the chances for precipitation. Near the end of this period
winds will shift southwesterly advecting warm area into the region.