Tunisia Subnational Rainfall: Dekadal Indicators and Forecasts

Tunisia subnational rainfall indicators provided by the World Food Programme (WFP) are derived from CHIRPS v2 satellite imagery and CHIRPS-GEFS forecasts. The data tracks 10-day (dekadal) precipitation across administrative units using Pcode references for spatial aggregation. Records include rolling 1-month and 3-month aggregations alongside long-term averages and anomalies.

Use Cases

• Drought monitoring using the 3-month rainfall anomaly (r3q) to identify precipitation deficits
• Agricultural yield forecasting by comparing current 10-day rainfall (rfh) against long-term averages (rfh_avg)
• Short-term weather risk assessment using CHIRPS-GEFS forecasts identified in the type column

Strengths

• Standardized subnational Pcode references for administrative units
• Nine distinct rainfall indicators including 3-month rolling anomalies
• Integrated forecast and historical data in a single schema

Limitations

• Satellite-derived CHIRPS data may deviate from local rain gauge measurements
• Final validated products have a multi-week lag compared to preliminary observations

Provenance

Source

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

Collection Method

Satellite imagery (CHIRPS v2) and GEFS short-term forecasts aggregated by administrative boundaries

Freshness

Updated six times per month on a dekadal cycle (1st, 6th, 11th, 16th, 21st, 26th).

Geography

Tunisia