During a strong, wind-driven, coastal upwelling event in July, 1973, off Oregon, large variations occurred in the properties of inertial-internal waves and water masses. At the peak of the event, the semidiurnal internal tide, which had significant amplitude during the spin-up phase, disappeared almost completely at mid-shelf. During the relaxation phase, near-inertial motions and anomalously warm water appeared at mid-depth in the upwelling zone....