Brazil: Subnational Dekadal Rainfall Indicators and CHIRPS Forecasts

Brazil subnational rainfall indicators provided by the World Food Programme, derived from CHIRPS v2 satellite imagery and CHIRPS-GEFS forecasts. The data tracks 10-day, 1-month, and 3-month precipitation metrics across administrative units identified by Pcode references.

Use Cases

• Assessing immediate moisture deficits using the 10-day rainfall anomaly percentage (rfq)
• Analyzing long-term drought trends by comparing 3-month rolling rainfall (r3h) to its long-term average (r3h_avg)
• Evaluating regional climate variability across Brazil using subnational Pcode identifiers

Strengths

• Includes 10-day, 1-month, and 3-month rolling averages and anomalies
• Uses standardized WFP Pcode references for administrative units
• Provides pixel counts (n_pixels) to indicate aggregation confidence

Limitations

• Satellite-derived CHIRPS data may deviate from local rain gauge measurements
• Temporal granularity is restricted to 10-day dekads rather than daily records
• Data status (type) changes from forecast to final over a multi-week cycle

Provenance

Source

World Food Programme (WFP) via CHIRPS and CHIRPS-GEFS

Collection Method

Satellite imagery (CHIRPS v2) and in-situ station data aggregation

Freshness

Updated multiple times per month on a fixed cycle (1st, 6th, 11th, 16th, 21st, 26th)

Geography

Brazil