The NTSB said the pilots did not anticipate the severity of the plume, despite having “sufficient meteorological information.

Authorities swarmed a Hawaiian Airlines plane just before takeoff at a San Diego airport after a passenger was overheard “making a threat” Tuesday morning, according to the airline and reports.

Editor’s note: This is a developing story. More details will be added once they become available. An unfounded report that there was an explosive device on a passenger jet about to depart San Diego ...