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We wanted to quickly highlight the core ENSO regions... perhaps too broad brush, but the region around Uruguay shows precip deficits and they extend into adjacent countries too (including northern Argentina).  Also keep in mind the maps above are only for a specific 3-month average period (Dec-Feb 2022-23).  Drought builds up over longer periods of time, and involves variables like soil moisture, and that's not examined here.  But I have read the longer-term drought has been very harmful for folks and interests in Argentina... thanks for sharing your observations in the comments and take care.