The combination of the absorption of a second low-pressure area to its southeast , a stronger than normal sea surface temperature differential along its path , and the presence Presence of a strong jet stream aloft led to Causation a rapid strengthening Cause_change_of_strength of the storm Catastrophe , with its central pressure falling Motion_directional to an estimated on 10 January .

By the end Process_end of 1968 and the absorption Cause_to_amalgamate of `` Tiger Hound '' operations by Operation Commando Hunt , 103,148 tactical air sorties had been flown Motion over Laos .