A new storm that’s bringing snow to the Midwest is also responsible for the rain and thunderstorms across the Eastern U.S. through Tuesday as it tracks into Canada.
This Sunday, severe storms will break out from Missouri southward through the Texas and Louisiana Gulf Coast as a line of storms develops by the evening. To the north, there will be showers just east of the center of the low pressure. The threat for severe storms continues overnight while the line of wet weather further develops and intensifies ahead of a cold front. Rain is forecast for Iowa southward through the central Gulf Coast. Meanwhile along the warm front to the east of the center of the low pressure, showers and maybe some thunder will span from Iowa through much of Illinois and southern Wisconsin, into much of Lower Michigan, and as far east as western Pennsylvania and New York.
On Monday, the threat for severe weather dwindles, although a spotty strong storm is still possible. The line of storms Sunday night will break up on Monday, but it will still bring scattered showers and thunderstorms from the Great Lakes through the Gulf Coast. That’s along the cold front; along the warm front, there will also be showers and embedded thunder spanning from southern Wisconsin through Southern New England. In Upstate New York and northern New England, snow and freezing rain will develop by the evening as the precipitation moves into freezing air. By Tuesday, portions of northern Maine may experience over a foot of snowfall. Otherwise, this will be a rain event for the large remaining majority of the Northeast.
Monday night, showers will head closer to the East Coast but will remain just inland overnight as the low tracks north and east. As cold air moves in from the Northern Plains, the rain showers will transition into snow showers near the center of the low in the Midwest. This includes Iowa, Illinois, Wisconsin, and Indiana, where up to one inch of snow may accumulate.
The storm will begin to wind down on Tuesday as it tracks into Canada and the cold front approaches the East Coast. Before then, rain and showers are forecast up and down the East Coast, mainly east of I-95, from the Canadian border in Maine through northern Florida. The heaviest, most widespread rain will be found in New England whereas the rest of the Eastern Seaboard will experience scattered showers. To the west, brief snow squalls on around the center of low pressure will move through the Ohio Valley and eventually into the interior Northeast. By the evening, most of the East Coast will dry out as warm air intrudes into all of New England. Therefore, the snow will transition to rain all the way up to the Canadian border in northern Maine before all precipitation ends early Wednesday morning.
Rainfall totals will be light for the most part, adding up to an inch across most of the East. Some of the heavier thunderstorms in the Southern Plains and mid-Mississippi Valley as well as New England may exceed an inch.