Temperatures in the Southwest will be relatively normal throughout much of the region, but where there are anomalies, there will be big anomalies. The upper section of the Southwest will get in on warmer than normal temperatures in the presence of the ridge that plagues the region during an El Nino. On the opposite end, area in and around Southern California should end up on the cool side as the constant influx of storm systems pulls in cooler air. This cooler air may extend into the mountains as well.
Precipitation will be abundant in the southern half of the Southwest, with the storm train leaving its mark across the region. Wet conditions will be present in low lying areas, while the mountains should get snowier than normal, thanks to the El Nino and the sub-tropical jet stream. A dry winter is in store for the upper portion of the Southwest, as the ridge in the Northwest deflects precipitation chances and leaves the region high and dry.