Winter Storm Stella threatens to be the worst this season for the Boston area, with more than a foot of snow likely on Tuesday. Here’s the latest on the timing of the snow according to Weather.com as of 6:30 a.m.

The chance of snow in Boston proper crosses the 50 percent threshold between 7 a.m. and 8 a.m. on Tuesday morning, reaching 100 percent by noon that day. However, there’s a chance the snow could turn to rain Tuesday evening, potentially decreasing the overall amount of snow accumulation.…