To the north of a blocking high-pressure system stretched west-to-east across southern portions of South America, two cutoff upper-level low-pressure systems have formed. One low is southeast of Brazil and is causing historic rainfall across Brazil. A second upper low is off the West Coast of South America causing the heavy rain pattern to arc westward. The upper-level features are reflected in the regional SSTA pattern. These conditions are likely to last into January causing more excessive rainfall in Brazil.