A cold frontal passage Friday afternoon and evening will bring an end to the heat wave that started the first day of summer on Wednesday, the National Weather Service predicts.
"Low pressure moves east of the region on Saturday with weak high pressure building in for the remainder of the weekend. A cold front moves across the region on Monday. An upper level disturbance will keep conditions unsettled through the first half of next week," the National Weather Service says.
While temperatures will be lower Friday, the NWS is issuing an air quality alert from 11 a.m. to 11 p.m. Friday.
The Connecticut Department of Energy and Environmental Protection (DEEP) says the air quality alert Friday is for the south central and southeastern coast of Connecticut, from New Haven east to Groton-New London.
DEEP is now extending this forecast to Friday, June 22 for the south central and southeastern coast of Connecticut due to weather patterns that will maintain elevated concentrations of ground-level ozone pollution. Clouds and showers are forecast to enter inland Connecticut late in the afternoon thus dispersing the ozone. South central and south eastern coastal Connecticut will be the last to receive the clouds and showers so the ozone levels may still exceed the standard in that area.
The weekend forecast for the Madison shoreline, Clinton and surrounding shoreline area is as follows:
Friday: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 84. North wind between 3 and 7 mph. Chance of precipitation is 40%.
Friday Night: Showers and thunderstorms likely, mainly after 9pm. Some of the storms could be severe. Cloudy, with a low around 67. Light northwest wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday: A chance of showers and thunderstorms, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 84. North wind between 3 and 6 mph. Chance of precipitation is 30%.
Saturday Night: Mostly clear, with a low around 61. North wind around 5 mph becoming calm.
Sunday: Sunny, with a high near 83.
The forecast for North Madison, Killingworth, and areas north is as follows:
Friday: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 92. North wind between 3 and 7 mph. Chance of precipitation is 40%.
Friday Night: Showers and thunderstorms likely, mainly after 9pm. Some of the storms could be severe. Cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday: A chance of showers and thunderstorms, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Northwest wind between 3 and 6 mph. Chance of precipitation is 30%.
Saturday Night: Mostly clear, with a low around 61. North wind around 5 mph becoming calm.
Sunday: Sunny, with a high near 83.
