Scattered thunderstorms -- some of them severe -- could punctuate the end of a gloomy day in southwestern Connecticut, according to the National Weather Service.

The threat of storms today is greatest after 3 p.m., the NWS says, as the daytime high temperature rises to about 80 degrees. Skies will be cloudy most of the day, with a southwest wind 5 to 10 mph. Chance of daytime precipitation is 30 percent.

Tonight, showers and more scattered thunderstorms are possible, mainly before 11 p.m. Some of the storms could be severe, the weather service warns, with gusty winds and heavy rain. The overnight low temperature will be about 60 degrees, with a west wind 7 to 9 mph. Odds of nighttime precipitation are 30 percent.

Tomorrow will be mostly sunny, with a high temperature in the mid-80s and a west wind 7 to 13 mph. Nighttime will be partly cloudy, with a low temperature in the mid-60s.

Friday also should be sunny, with a high temperature in the upper-80s. Nighttime will be partly cloudy, with a low temperature in the mid-60s.

Saturday is expected to be mostly sunny, with a high temperature in the low-80s. Overnight, clouds move in and the temperature will dip to a low in the low-60s.

The outlook for Sunday, according to the weather service, is sunny and temperatures in the 80s.