The National Weather Service has issued a flood watch for Fairfield and New Haven counties, with a major nor\u2019easter expected to bring heavy rain to the region late tonight and Tuesday. The flood watch is in effect for Tuesday morning through late Tuesday night, and covers much of the tri-state region. In addition, a coastal flood watch has been issued for towns along Long Island Sound for the same time period. \u201cRain will be heavy at times with 2 to 3 inches possible by the time the event ends Tuesday night, with localized higher amounts,\u201d the weather service said. The slow-moving storm is moving up the Eastern seaboard and will arrive late Monday night, and it should rain all day on Tuesday throughout the region. Temperatures to rise The storm also will bring warmer temperatures, but could begin as a wintry mix on late Monday night in some towns, the forecast said. This could include freezing rain and snow. As of 12:30 p.m. Monday, temperatures are in the low 20s in much of Fairfield County. The storm also will produce strong winds, with wind gusts close to 40 mph possible on Tuesday, according to the weather service. Tuesday\u2019s high in Wilton is expected to be near 42, but the wind chill will make it feel between 25 and 30. Rain and snow are also is likely on Wednesday, eventually turning over to all rain. There is a possibility of snow showers on Thursday. Temperatures will remain in the 30s and low 40s during the coming days. Friday, Saturday and Sunday are expected to be sunny, with highs in the low to mid 40s.