Today’s storm is similar to one that rocked Boston and other coastal areas earlier this year, but will cause even more damage as strong winds, heavy rains and high tides create a dangerous mix, a weather expert said.The nasty nor’easter is expected to dump both snow and rain, along with 60 mph wind gusts, throughout the area, according to the National Weather Service. Like January’s storm, it is expected to hit during an astronomical high tide — but while that earlier storm only lasted for one high tide, this one will likely last for three.