CT Weather: Thunderstorms To Create Flooding Concerns Friday/Saturday

CONNECTICUT — Showers and thunderstorms are forecast to produce "heavy downpours" on Friday afternoon through Saturday, according to the National Weather Service.

Flash flood conditions are possible, and a flood watch has been issued for most of Connecticut.

The weather service said 1 to 2 inches and possibly up to 3 inches of rain is possible.

Regarding their confidence in the forecast, the weather service said, "There is moderate/high confidence in showers and thunderstorms developing, but there remains some uncertainty on the exact placement of the axis of heaviest rainfall. An expansion of the Flood Watch into the rest of southern Connecticut may be needed should the expected axis of heaviest rainfall spread eastward."

WFSB 3 TV meteorologists forecast details for Friday

"...for our Friday, expect mugginess to return; there’s also a chance for isolated showers or storms. Regardless, we’ll likely end the week with more clouds than sunshine, keeping temps from reaching 90, therefore ending our current heat wave," WFSB 3 TV meteorologists said.

Weekend forecast details via WFSB 3 TV meteorologists

"While high pressure positioned near Bermuda deflected the remnants of Beryl to our northwest, it will likely send this plume of tropical moisture in our general direction. Because of the likely impacts to outdoor plans from showers (perhaps downpours, and some rumbles of thunder), we’ve issued a First Alert Weather Day for tomorrow. A Flood Watch has been posted for all of Northern CT and Fairfield CT for late tonight through the day tomorrow. Most of the state is currently in a Level 2 risk on the Excessive Rain Outlook. High temperatures will be a factor of sunshine or lack thereof. For now we’re forecasting highs in the mid-80s. By Sunday, we’re trending drier and brighter. Also, it will be noticeably hotter with highs back in the 90-95 range! This is likely when our 3rd heat wave of the year commences." (Read/watch more at WFSB 3 TV).

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Here are the forecast details for southern Connecticut via the National Weather Service:

Today: Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 85. Light south wind increasing to 6 to 11 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Some of the storms could produce heavy rainfall. Low around 72. South wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 84. South wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night: Showers likely before 8pm. The rain could be heavy at times. Partly cloudy, with a low around 71. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: Sunny, with a high near 90. Calm wind becoming southwest 5 to 7 mph in the morning.

Here are the forecast details for northern Connecticut via the National Weather Service:

Today: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 88. Light south wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then showers likely after 5am. Some of the storms could produce heavy rainfall. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 73. South wind 7 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday: Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 3pm, then a chance of showers and thunderstorms after 3pm. Some of the storms could produce heavy rainfall. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 85. South wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

Saturday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 69. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Sunny, with a high near 92. Calm wind becoming west around 6 mph in the afternoon.