Angola: Subnational Dekadal Rainfall Indicators and Anomalies

Dekadal rainfall indicators for Angola, aggregated by subnational administrative units using CHIRPS v2 satellite imagery and CHIRPS-GEFS forecasts. Produced by the World Food Programme, it tracks precipitation totals, rolling averages, and anomalies across 10-day intervals. The data is updated up to six times per month to transition from short-term forecasts to final observations.

Use Cases

• Monitoring drought conditions using the 3-month rainfall anomaly (r3q) column
• Predicting agricultural productivity based on 10-day rainfall totals (rfh)
• Analyzing climate trends by comparing current precipitation against long-term averages (rfh_avg)

Strengths

• Includes both historical averages and real-time forecasts for comparative analysis
• Aggregated at subnational levels using standardized WFP Pcodes for easy integration
• Provides pixel counts (n_pixels) to indicate the data density used for each aggregate

Limitations

• Relies on satellite-derived estimates which may deviate from local ground-station measurements
• Data status (forecast vs. final) changes frequently, requiring users to manage versioning within a single month

Provenance

Source

World Food Programme (WFP) using CHIRPS and CHIRPS-GEFS data

Collection Method

Satellite imagery combined with in-situ station data and short-term forecasts

Freshness

Updated six times per month to provide initial forecasts, updated forecasts, and final observations.

Geography

Angola