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1. Here are two pressure analysis maps from this morning at 5 and 9 a.m.
A low pressure area was moving through the Great Lakes region with a cold front extending southwest from the low pressure center. Showers and a few thunderstorms developed along and ahead of the front. The showers will move across the Northeast this afternoon and tonight, probably not reaching south of Pennsylvania and New Jersey. The system may slow as it goes through and past coastal New England. If this happens, there will be cloudiness Saturday with several hours of rain from Providence to Portland.
2. This radar shows the shower area at midmorning. The rain area will likely be better organized later Saturday morning in eastern New England.
There were even some thunderstorms early this morning as chilly air passed over the still-warm lakes:
This map shows the Great Lakes shower zone as well as moist areas in South Florida and the southern Plains. The highest elevations near the Continental Divide in Colorado were getting draped with snow.
3. Looking ahead to next week, a large ridge aloft will build over the Eastern states. The nights will be be chilly for a while with very dry air in place. However, afternoon temperatures will be near 80 in Chicago most of next week, and should reach at least well into the 70s in Boston from midweek and beyond.
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