Forecasters said the snow should not accumulate more than an inch, but could start falling before the 4:30 p.m. EST kickoff on Saturday.
Winds in the 12-15 mph are expected -- perhaps enough to influence field-goal attempts at a stadium that can be tricky for kickers even during ideal weather.
The stadium has a new grass field that was installed at the NHL's expense following the Capitals-Penguins Winter Classic on Jan. 1.
This is the third surface at Heinz Field this season, as the sod also was replaced after four high school football playoff games were played there Thanksgiving weekend. The Steelers played three games on that field.