Timeline For Storms, Significant Flooding Today Released, Debby's Impacts Rise

SOUTHERN CONNECTICUT — A flood watch is in effect from Tuesday afternoon through Wednesday morning as heavy rain and storms “could lead to flash flooding concerns,” according to the National Weather Service.

Additionally, the remnants of Debby “could lead to a moderate to high impact event across the area” from Thursday through Saturday, the weather service said.

The weather service said 1–2 inches of rain is forecast on Tuesday afternoon and through Wednesday morning, but some areas may see up to 5 inches of rain by Wednesday morning.

“Flooding could be locally significant, causing major disruptions to transportation, flooding basements, first floors of residences and businesses, underground infrastructure, and posing an elevated threat to life,” the weather service shared in a statement.

“Risk for isolated strong to severe thunderstorms primarily with strong to damaging winds gusts this afternoon and evening,” the weather service added.

“There is high confidence in bands of heavy downpours and thunderstorms developing in the vicinity of the Tri-State area along a stalling frontal boundary this (afternoon) into tonight, most likely focused on southern portions of the area, but there is still some uncertainty regarding location,” the weather service shared in a morning briefing.

“While heavy rainfall is likely this afternoon into tonight along a stalled frontal boundary, the front, along with the heaviest rainfall, is expected to shift south Wednesday morning. Confidence is only moderate with this timing,” the weather service added.

As of now, Debby is forecast to bring more rain and thunderstorms to southern Connecticut from Thursday through Saturday, before nicer weather is expected on Sunday. Specific impacts have not been released, but will be shared later in the week as the remnants of the storm move closer to the area.

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Here is the updated forecast details for coastal sections of southern Connecticut:

Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 82. West wind 5 to 8 mph becoming northeast in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 64. East wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday: Showers likely and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Cloudy, with a high near 72. Northeast wind 10 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Northeast wind 6 to 8 mph. Chance of precipitation is 30%.

Thursday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 76. East wind around 11 mph.

Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Friday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 90%.

Here is the updated forecast details for inland sections of southern Connecticut:

Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 79. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Tonight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 62. Northeast wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 71. Northeast wind around 8 mph. Chance of precipitation is 50%.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. East wind 6 to 8 mph. Chance of precipitation is 30%.

Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Friday: Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%