With a significant winter storm impacting the region on Tuesday, here’s a look at the expected timing of the nor’easter:

7 a.m. — After a mix of rain and snow overnight, there should be a full changeover to snow across the region.

9 a.m. — The snowfall rates are expected to start increasing, with rates as high as 2 inches per hour possible. The worst of the snow should last through the early afternoon. The bullseye zone will be over southeastern Massachusetts.

2 p.m. — Coastal flooding and beach erosion will be possible during the afternoon high tide across eastern Massachusetts. Heavy snow and gusty winds may lead to power outages.

5 p.m. — Snow should come to an end, and road conditions are expected to improve.