The family approached the water with their boat before as storm was coming in.
A storm was coming
If somebody approaches the water before a storm, it stands to reason that a storm is coming.
exists e1 p1 x1 x2 x3.(n_boat(x3) & of(x3,x2) & n_thing(x2) & n_water(x2) & n_family(x1) & exists e2 s1 x4.(a_in(s1) & Manner(e2,s1) & Actor(e2,x4) & v_come(e2) & n_storm(x4)) & as(e1,p1) & with(e1,x3) & r_before(x3) & Theme(e1,x2) & Actor(e1,x1) & v_approach(e1))
exists e1 x1.(Actor(e1,x1) & v_come(e1) & n_storm(x1))