Wednesday 11 a.m.
A storm crossing the Plains will deliver much needed moisture in the form of a less-needed blizzard. As the storm heads toward the Great Lakes, it will weaken, but how much and how quickly are issues making the forecast a challenge. Our forecasts this morning were going with the idea of 3-6 inches around Chicago (with a sentiment leaning more toward 3 than 6) and half of that in Michigan. Some of the energy from the storm system will cross the Gulf states, causing some heavy rain. That energy may help fuel a new storm the would form off the Middle Atlantic coast then blossom into another New England snowstorm late Saturday or Sunday. With so much unresolved about this, we may see record-breaking speculation. Please check out this video, which uses last night's European model to show a plausible set of outcomes.
Here is our draft snowfall map as of late morning Wednesday.
This map is a rainfall forecast from the NWS Middle Atlantic River Forecast Center located in State College, PA.
The upper-air flow forecast for this evening shows the trough that helps to support rainfall ahead of the cold front.
After reaching the 80s today from NYC to Boston, it might not be that warm again through much of next week.
A noticeable push of cooler air will spread southward from Ontario and Quebec into the eastern Great Lakes and New England between tomorrow and Saturday.
A cold front from eastern Canada will slide southward along the East coast between late Friday and the end of the weekend. For the area from Philadelphia to Boston, where temperatures will reach the summery 80s each day through Friday, it will mean a noticeable change to cooler weather.
Average high temperatures in Chicago and New York City are in the mid-70s now, but for the next several days, temperatures will run 8-15 degrees above those long-term averages. Supporting this warmth is a flow aloft that originates over the Southwest: