Individual analysis by river basin

Basins on the left bank of the Amazon River (Amazonas State)

Updated on July 16, 2025

Accumulated precipitation vs climatology

30 days
chart

Comparison between climatological quantiles and observed accumulation.

Anomaly and trend

14 to 28 days
chart

Anomaly, forecast and observed indicators.

Basin highlights

The climatology of the period under analysis indicates rainfall with records varying between 100 and 122 mm being considered normal (reference quantiles 42.5% and 57.5%). On July 16, 2025, 161 mm of average accumulated precipitation was observed over the basin in 30 days, the calculation of the average of the categorized anomaly index in the basin area the value of 1.8, classifies the basin as tendency to very rainy condition. In the coming weeks, climate behavior indicates a decrease in rainfall volumes, the sub-seasonal forecast model suggests very rainy behavior or a tending to be very rainy.

Climatology

100 mm - 122 mm

Observed 30 days

161 mm

Anomaly index

1.8

Basin classification

tendency to very rainy condition

Forecast

very rainy behavior or a tending to be very rainy