UPDATE: The storm knocked out power in Salem and Saugus and NECN reports cars in flood waters on Broadway in Malden.
Around 2:05, the National Weather Service issued a tornado warning for "extreme northeastern Suffolk County." Which would be, what, Revere and Winthrop? In any case, the NWS based its warning on radar showing "a severe thunderstorm capable of producing a tornado" near Lynn that was moving east at 25 m.p.h.
Ed. note: All of a sudden my phone's screen lit up with a giant red triangle with an exclamation mark of doom in the middle warning me to "take shelter now." NWS should probably want to give better definitions that people actually use around here, like town names, rather than "extreme northeastern Suffolk County."