Climate monitoring bulletin for the major river basins

The Amazon Basin

Volume 04 - Number 13

Publication date: April 1, 2026

Periodicity: Weekly

ISSN 2965-7857 • DOI 10.61818/78570413

Precipitation anomaly in the Amazon Basin
Legends

Current conditions

Maps of observed precipitation conditions, individual graphics by basin are produced from MERGE/GPM data generated by INPE/CPTEC, considering the period from de 2000 a 2025. Between March 3 to April 1, 2026, below-average rainfall has resulted in a precipitation deficit along the main course of the Amazon River in Brazilian and Peruvian territories, as well as in the watersheds of the Aripuanã, Coari, Curuá Una, Içá, Iriri, Japurá, Javari, Ji-Paraná, Juruá, Jutaí, Madeira, the left-bank basins of the Amazon River in the northeast of the state of Amazonas and in the northeast of the state of Pará, Napo, Negro, Purus, Tefé, Teles Pires, Xingu, and the main course of the Solimões River; above-normal rainfall recorded in the Mamoré River basin; near-normal rainfall recorded in the basins of the Abacaxis, Beni, Branco, Guaporé, Juruena, and Marañon rivers, the basins on the left bank of the Amazon River in the northwest of the state of Pará, and the Tapajós and Ucayali rivers. The multimodel indicates, for the period from March 4, 2026, to March 10, 2026, a forecast of rainfall below climatological norms concentrated in the southern part of the monitored region, over the basins of the Abacaxis, Beni, Coari, Curuá Una, Guaporé, Ji-Paraná, Juruena, Mamoré, Marañon, Tefé, Teles Pires, and Xingu rivers; Forecast of above-normal rainfall over the main course of the Amazon River in Brazilian and Peruvian territories, the Branco, Javari, and Jutaí river basins, the left-bank basins of the Amazon River in the northeast of the state of Amazonas and the northwest of the state of Pará, the Negro River, and the main course of the Solimões River.

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