CT Weather: Tornado, Severe Thunderstorms, Flash Flooding Concerns All Possible Thursday

Storms on Thursday in Connecticut are expected to bring heavy rain, damaging wind gusts and even the potential for flash flooding and an isolated tornado, according to forecasters.

Timeline of concern

The National Weather Service predicts there will be another round of storms Thursday afternoon, particularly between 3 p.m. and 9 p.m., some of which will be severe.

WFSB is also predicting the potential for “strong to severe storms” today, due to a stalled boundary to the south moving northward as a warm front.

The station is calling Thursday a “First Alert Weather Day” and says rain will be heavy at times and could impact both the morning and evening commutes.

Storms may be strong-to-severe

“We’ll be monitoring the threat for strong to severe storms,” WFSB reports. “Currently, the level 1 risk from the Storm Prediction Center encompasses the entire state. While the greatest concern will be damaging wind gusts, an isolated tornado can’t be ruled out.”

Rain is expected to end later tonight, with the state getting an additional one to three inches of rain by the time it clears out. Some communities impacted by storms could get even more precipitation, according to WFSB. The amount of rain could lead to poor drainage issues and even flash flooding, the station reported.

A cold front will impact the state come Friday, bringing increasing sunshine and less humidity, followed by dry weather for the weekend, WFSB predicts.

The best days for outdoor activities will be Friday through Sunday. The Durham Fair runs today through Sunday.

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

Today: Showers and possibly a thunderstorm before 5 p.m., then a chance of showers and thunderstorms after 5 p.m. Patchy fog. High near 74. South wind 7 to 11 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Tonight: Showers and thunderstorms before 2 a.m., then a chance of showers. Patchy fog. Low around 66. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Friday: Cloudy, then gradually becoming mostly sunny, with a high near 79. West wind 5 to 8 mph.

Friday Night: Partly cloudy, with a low around 60. Light north wind.

Saturday: Partly sunny, with a high near 77. North wind around 7 mph becoming southeast in the afternoon.

Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 61.

Sunday: A 30 percent chance of showers before 2 p.m. Mostly cloudy, with a high near 75.

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

Today: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Patchy fog. High near 73. South wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Tonight: A chance of showers and thunderstorms before 1 a.m., then a slight chance of showers between 1 a.m. and 2 a.m. Patchy fog. Otherwise, cloudy, with a low around 64. South wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Friday: Mostly sunny, with a high near 80. Northwest wind 3 to 8 mph.

Friday Night: Partly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.

Saturday: Partly sunny, with a high near 78. Light and variable wind.

Saturday Night: A chance of showers, mainly after 3 a.m. Mostly cloudy, with a low around 58. Light south wind. Chance of precipitation is 30%.

Sunday: A chance of showers before 8 a.m. Mostly cloudy, with a high near 78. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.