Summary:
- December was mild and dry over much of the west, while the east was much warmer than average.
- The winter rain deficits are adding up for the majority of the western US contributing to ongoing drought concerns, especially in the PNW.
- The seasonal forecast for January through March continues to reflect the influences of a weak to moderate El Niño in the Tropical Pacific and a warm North Pacific. As such the odds continue to be tilted toward a warmer and near average to drier than average winter across the PNW and northern tier of states and near average temperatures and wetter than average conditions across the southern tier of states.
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