December Precipitation & Temperature: December precipitation ranged from average to much-below average across most of Arizona and New Mexico, with record-dry conditions along the western edge of Arizona and in pockets of central and eastern New Mexico (Fig. 1a). December temperatures were above average to record warmest in both states (Fig. 1b), continuing the pattern observed during fall 2017. (read more)
La Niña conditions have continued for another month at weak-to-moderate strength, with both atmospheric and oceanic conditions, including sea-surface temperatures (SSTs), demonstrating a consistent La Niña pattern (Figs. 1-2). Forecasts continue to suggest that a weak-to-moderate La Niña event will last through the winter before weakening this spring. (read more)
The year 2017 was record warm across most of Arizona and New Mexico, in no small part thanks to the exceptionally warm conditions during the final three months of the year (and November in particular). (read more)
