An overnight rain storm will bring heavy rains to portions of Pennsylvania, Delaware, and New Jersey tonight before moving into southeastern New England early tomorrow. The heavy rain has prompted the National Weather Service to issue Flood Advisories; they caution people to turn around, not drown, and avoid flooded roadways.
Low pressure responsible for this rain will track up the Mid Atlantic coast tonight, moving into New England on Sunday. A brief return to high pressure is expected for Sunday in this region. A new area of low pressure will move through Great Lakes, dragging a cold front through the northeast on Monday.
While guidance earlier in November was bullish that an active east coast storm pattern would form in the eastern U.S. beyond these current storms, it no longer appears to be the case. A primarily zonal flow is now forecast to persist for the remaining days of the month, keeping odds of a blockbuster east coast winter storm down. While such a pattern could change and become more wintry, it is unlikely to occur prior to December 7 for now.