The extreme cold now freezing the Great Lakes and Northeast will ease somewhat as we go into the weekend, but more bitterly cold will air follow and will only ease slightly before Groundhog Day. This video has more.
Here are some maps showing snowfall totals observed and collected by the National Weather Service:
These reports cover the area from near DC to NYC.
This map focuses on the area around New York City.
The map below shows results for Connecticut.
This map for eastern New England is not complete nearest the coast because it was still snowing in parts of the area. Clearly, there was a great drop off in amounts from the South Shore (south of Boston) to Boston's northwest suburbs (where it was a relatively minor event).
Looking ahead to Groundhog Day and the Big Game, the GFS ensemble forecasts still show a wide range of possibilities, with gametime temperatures potentially as high as 40 or as low as the single digits. My prediction: this will resolve itself by game time.
Lake-effect snow hit Chicago this morning. This happens when cold winds at low cloud height are from the northeast. When the flow is from the west or northwest, the Michigan and/or Indiana snow belts come alive. These maps show the setup from this morning.
This map shows a low pressure center along a cold front that will cross the Eastern states today. From southern Pennsylvania southward, a few thunderstorms can develop this afternoon and evening, but everyone in the Middle and North Atlantic state should get some rain.
One way of displaying a forecast is by using a meteogram. Items like temperature, wind and precipitation are distributed across a chart so you can see what is supposed to happen and when. This cart is a meteogram for New York City. Three details are highlighted.
Thunderstorms broke out last night ahead of the warm front that will bring milder air to the Northeast on Thursday. Hundreds of lightning strokes occurred from Nebraska and Missouri into western Illinois. This picture shows a shaft of lightning about a mile from my home a couple of years ago.
Video: all the excitement of watching paint dry. This six-hour time lapse from Saturday, March 21, shows a parade of clouds overhead and the progressive melting of snow that fell heavily in central Pennsylvania the day before.
This map shows the storm causing today's area of snow, but with west to east flow, shows why the weather right behind the storm should be milder tomorrow. The cold front in the northwest corner arrives Sunday.