The National Weather Service in Upton, N.Y. has issued a Flood Watch for Westport and area from Monday morning through late Monday night.
It said total rainfall amounts of 1 to 2 inches with locally higher amounts are possible across the tri-state area on Monday.
Rain will develop after midnight and continue into the early afternoon Monday ahead of a warm front. A second area of rain with scattered thunderstorms is then forecast to move in from the southwest in the afternoon and early evening hours, an advisory said.
This rainfall combined with the nearly saturated grounds from the 1 to 2 inches of rainfall that fell on Friday will exacerbate the flood threat.
In addition, the recent stretch of mild weather and rain has allowed for the formation of ice jams. The buildup of water behind these ice jams can result in flooding upstream as well as downstream if they give way, the National Weather Service said.