The storm that came up the coast during the weekend included snow that changed to rain and freezing rain from parts of eastern Pennsylvania and New Jersey to eastern Massachusetts. This left trees, cars and many other things encrusted in ice as the storm departed. Now, a smaller, but still significant low pressure should move from Missouri this morning to near Delaware Bay tomorrow morning. One area of snow broke out ahead of this system and affected Cincinnati this morning. That snow should dissipate crossing the Appalachians.
A new area of snow now over southern Minnesota should expand southeastward to reach Chicago this afternoon, streak to Pittsburgh this evening, then reach the Philadelphia/New York City area late tonight or early tomorrow morning. This all suggests a slow evening commute in Chicago, then a slow morning commute tomorrow in Philadelphia and perhaps New York City. With an addition of Atlantic moisture, snow could adversely impact travel in Boston for their afternoon/evening commute.
This video has more:
This map shows a low pressure area over Missouri. The line extending east from the low is a front that separates cold air to the north from milder air to the south. As the mild air is forced to rise over the entrenched cold air, it cools to the saturation point, leading to clouds and then precipitation.
Putting it another way:
The great composer Ludvig Von Beethoven was born on this date in 1770. Of course this week, most people are trying to orchestrate their last Christmas purchases. If you're finished, you have our praise... but if unfinished, symphonies.
In the weather department, it has been cold and snowy recently from Maryland to Maine. With each storm, it was difficult to orchestrate movements. Temperatures will be on the low end of the scale today through Wednesday, and by tomorrow, a new storm will cause snow to spread across parts of the area. The key to our accumulation is the exact track of the storm. If the storm is conducted by to our north or south, the accumulation will B minor and shouldn't harmony one. However, if the main part of the storm comes toward us, we would C major snow: several inches. That would cause dischord and force people to improvise. However, if you keep your composer, you should be okay.
In the finale, chilly woods winds will return. Wednesday will be chilly, bassoon milder air will arrive. Temperatures late this week will not drop of clef, but instead go upscale. What about Christmas? You have my symphonies again about this, but that part of the forecast... is unfinished.
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Street flooding in some of the heavier rain
Such is the stuff that generates rumors, worries or snowstorm dreams that later turn out to be unfounded.
As we close out November and start December this week, the Northeast will have two rounds of rain and a warmup.