Algeria Subnational Rainfall: Dekadal Indicators and CHIRPS Forecasts

The World Food Programme provides dekadal rainfall indicators for Algeria aggregated by subnational administrative units. The data integrates CHIRPS satellite imagery and CHIRPS-GEFS forecasts to track 10-day, 1-month, and 3-month precipitation trends.

Use Cases

• Drought monitoring using the rainfall anomaly percentage (rfq)
• Agricultural planning by comparing 3-month rolling aggregations (r3h) against long-term averages (r3h_avg)
• Early warning systems using the type column to distinguish between forecast and final observation data

Strengths

• 9 distinct rainfall indicators including anomalies and rolling averages
• Standardized WFP Pcode references for administrative units
• Includes pixel counts (n_pixels) to indicate spatial data density

Limitations

• Satellite-derived estimates may deviate from local ground-station measurements
• Frequent data revisions as forecasts are replaced by preliminary and then final observations

Provenance

Source

WFP - World Food Programme via CHIRPS v2 and CHIRPS-GEFS

Collection Method

Aggregated from satellite imagery and short-term rainfall forecasts

Freshness

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

Geography

Algeria