Get ready for the boomers. The National Weather Service says there’s a line of strong thunderstorms stretching from Central Massachusetts into Rhode Island that’s heading northeast, into the Boston metropolitan area.

The forecasters warned that the storms, with wind gusts up to 40 miles per hour, would produce lightning and heavy downpours that could flood streets.

Just after 5 p.m., the storms were stretched from near Uxbridge to Block Island and moving northeast at 60 miles per hour, the forecasters said.

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Earlier, the forecasters warned that dense fog could bring visibility down to a quarter-mile or less — and it could have an impact on the afternoon commute.

Heavy rain and temperatures in the upper 40s are expected to cause drains to clog with melting snow, increasing the risk of flooded roads.

“The snow tries to go into drains and that’s the problem,” said National Weather Service meteorologist Bill Simpson. “If drains are clogged, you’re going to get pooling in some areas.”

Showers and fog should clear out before 10 p.m. as skies gradually become clear. Temperatures will sink into the mid-30s overnight.

This weekend will be mostly dry and warm, with a slight chance of rain or snow late Sunday.

Skies on Saturday will be sunny as temperatures climb to an above-average 47 degrees. Some clouds will arrive in the evening. Lows will sink into the lower 30s.

Mostly sunny skies will reappear Sunday as highs climb back into the mid-40s. Some light, scattered rain showers could fall between 4 and 9 p.m.

“There might be a little bit of snow,” Simpson said.

Cloudy conditions will persist overnight as temperatures drop to 27 degrees.

Next week will start off dry, with high temperatures hovering near or below freezing through midweek.

“The next potential precipitation is for some snow between Tuesday and Wednesday,” Simpson said.