The morning after one of the most intense tornados recorded in New Jersey history all but demolished the largest dairy farm in the state, owners Marianne and Wally Eachus looked at each other and just cried. “What are we going to do?” they asked one another. Just 12 hours earlier, the couple was eating dinner when cellphone weather alerts warned that a tornado was imminent. The clouds were intense and swift, then there was a sound like a freight train, Marianne recalled. They ran to the basement just in time for the EF3 tornado, one of seven that ripped through parts of New Jersey and Pennsylvania during last week’s storm, to pass over. Barely three minutes went by, and it was gone. When the owners of Wellacrest Farms in Mullica Hill, a suburb of Philadelphia, came out of their basement along with other family on their homestead, they saw that …