Summary- The basic pattern consists of periods of active westerlies, and troughing near and west of N Calif and the Great Basin. A pool of unusually cold water remains W of Calif, and colder than normal sea surface is near and south of southern Baja Calif. The area of cold sea surface temperatures near southern Baja includes most of the region in which tropical cyclones form off the SW coast of Mexico. This argues for a weak or slow start to the tropical cyclone season off W Mexico this June and July. El Niño has developed. While El Niño’s Influence is mostly minimal during the mid-summer, the typical moderate to strong El Niño pattern is expected to continue thru the summer. As the season changes in the fall, El Niño has potential to become more important in modifying the prevailing pattern across Calif and the western U.S. for the 2017-18 winter wet Season, producing support for above normal rainfall.