Sporadic South America rainfall continues into early December

November rainfall deficits carry over into December for some.

Sporadic rainfall during the month of November 2020 in South America has led to a patchwork of fields with varying crop conditions. While the month overall was drier than normal across a large portion of the crop-producing states of Brazil and Argentina, rains arriving at a critical time in the final week of November may have prevented some larger losses in southern Brazil and northern Argentina. As we move forward into the first full week of December, more sporadic rainfall is expected in Brazil, while Argentina crop-producing regions dry out.

For the Brazilian states of Parana, Sao Paulo, Mato Grosso do Sul, Goias, and Minas Gerais, November 2020 trended anywhere from the second to the sixth driest in 30 years. In southern Rio Grande do Sul, this was the driest November in over 30 years. Very dry conditions extended into Uruguay, which also trended the driest in 30-plus years. Dry weather reached down into eastern Argentina and this was the second driest November in 30 years for the state of Buenos Aires.

Rainfall in southern Brazil and Argentina in the final week of November helped to improve surface soil moisture across the region, but drier weather continued in Mato Grosso do Sul, northwestern Sao Paulo, Mato Grosso, Goias, and Minas Gerais. Over the seven-day period from December 4 to 10, 2020 rain will be sparse across Argentina as high pressure brings drier weather. Sporadic rain will continue to be the story in Brazil in the first full week of December with some beneficial rains possible in Parana and Minas Gerais, but Mato Grosso Do Sul, northwestern Sao Paulo, and Rio Grande do Sul will see drier than normal conditions.

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