CT Weather: Strong to Severe Thunderstorms Possible Friday

By 9 p.m. tonight, all sections of Connecticut will no longer be under a Heat Advisory, and the 7-day heatwave will officially end. That all sounds like great news but strong to severe thunderstorms are possible overnight and into Friday which could lead to flash flooding concerns, especially at the Connecticut coast.

The stormy weather will exit the state by mid-afternoon and set us up for a magnificent summer weekend. Saturday and Sunday are both carbon copy days featuring sunny skies and temps around 80 degrees.

Here is a detailed look at when the severe weather is possible based on where you live in CT:

Southern Fairfield-Southern New Haven-Southern Middlesex-Southern New London

...FLASH FLOOD WATCH IN EFFECT FROM 2 AM EDT FRIDAY THROUGH FRIDAY AFTERNOON...

* Heavy rainfall from showers and thunderstorms will result in urban and poor drainage flooding. Rainfall rates of one to two inches per hour are possible with some of these storms.

* Torrential downpours could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should flash flood warnings be issued.

Here is a detailed look at the stormy weather for the CT coast:

Tonight: A 50 percent chance of showers and thunderstorms, mainly after 3am. Some storms could produce heavy rain. Mostly cloudy, with a low around 77. Southwest wind 8 to 13 mph.

Friday: Showers and thunderstorms, mainly before 4pm. Some storms could produce heavy rain. High near 86. Southwest wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Northern Fairfield, New Haven, Middlesex, and New London counties:

The Heat Advisory ends at 8 p.m. for the region and that will be the end of the 7-day heatwave. But in order to make it end we'll be dealing with Mother Nature's fireworks in the form of thunderstorms on Friday.

Tonight: A 50 percent chance of showers and thunderstorms, mainly after midnight. Some storms could produce heavy rain. Mostly cloudy, with a low around 76. Southwest wind 6 to 11 mph.

Friday: Showers and thunderstorms, mainly before 2pm. Some storms could produce heavy rain. High near 83. Southwest wind 8 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Hartford, Tolland and Windham counties:

Like northern areas of Southern Connecticut, the Heat Advisory ends at 8 p.m. tonight for Hartford, Tolland and Windham counties, but this sets the stage for a chance of stormy weather on Friday.

The National Weather Service says, "During Friday, there is the potential for a few strong to severe thunderstorms. The main threats from thunderstorms are damaging winds and heavy rainfall."

Here is the detailed forecast on the potential severe weather:

Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 75. South wind 9 to 13 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Showers and thunderstorms, mainly before 1pm. Some storms could produce gusty winds and heavy rain. High near 83. South wind around 10 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Litchfield County:

Once again the good news is that the Heat Advisory ends at 9 p.m. tonight but storms will move in overnight and on Friday, the weather service states.

There is a marginal risk of severe thunderstorms late at night with damaging wind gusts the main threat. In addition, some thunderstorms will produce very heavy rainfall which may cause flooding low lying and poor drainage areas.

There is a marginal risk of severe thunderstorms Friday morning with damaging wind gusts the main threat. In addition, some thunderstorms will produce very heavy rainfall which may cause flooding low lying and poor drainage areas.

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