Initial reports Monday indicated the incoming winter storm would have a marginal effect on the region.

By Tuesday morning, a winter storm warning was issued, and snowfall predictions went up.

National Weather Service now predicts 8-12 inches of snow for Harrisburg and other areas of south central Pennsylvania, including York, Chambersburg, Gettysburg, and Lancaster.

3/20/2018 @ 6AM: This upcoming storm is presenting a huge challenge for sure. Normally we have a well organized surface... Posted by US National Weather Service State College PA on Tuesday, March 20, 2018

AccuWeather also predicts 6 to 12 inches for most of central Pennsylvania.

Snow is expected in central Pennsylvania from Tuesday into Wednesday.

While still predicting some accumulating snow, local television stations aren't predicting quite as much.

Meteorologists with ABC27 predict 2-5 inches in Harrisburg, and 5-8 inches farther south near York. WGAL predicts 5-8 inches for all of central Pennsylvania.

FOX43 predicts 1-4 inches for Harrisburg and areas to the north, and 4-6 inches south near York.

CBS21 predicts 2-4 inches for Harrisburg, and 4-8 inches in areas farther south.

Another key point to make with this storm as we continue to look at guidance and real-time information today, is that elevations will likely do much better with snow than valleys. Too much mixing in lower elevations at times. Just something else to consider too. #27Weather pic.twitter.com/KSYS2j34kk — Brett Thackara (@BrettThackABC27) March 20, 2018

Plenty of moisture aloft but little reaching the ground... reminder that we are under a Winter Storm warning until 8pm tomorrow. Much better chance of accumulating snow tonight/tomorrow. pic.twitter.com/NriBA3rbFH — Steve Knight (@KnightCBS21) March 20, 2018

Stay WEATHER SMART with a look Hour by Hour look at what you can expect. Make it a great day! #FOX43 #PAWX pic.twitter.com/3XlnUaZZ6q — MaryEllen Pann (@MaryEllenFox43) March 20, 2018

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