La Nina Winter Vs. Cumulative Precipitation Deficits
While the precipitation and temperature patterns in the U.S. Southwest were consistent with a typical La Niña (Figs 2A-C), these winter conditions amplified the existing deficits resulting from the widespread well-below average monsoon in 2020 (Figs 1A-C).
- Figures 1A,1C, 2A, 2C - West Wide Drought Tracker - wrcc.dri.edu/wwdt
- Figures 1B,2B - CLIMAS: Climate Assessment for the Southwest - climas.arizona.edu - data: RCC-ACIS
For a detailed look at regional precipitation tracking, check out Mike Crimmin’s Climate Station Summaries