French Guiana: Subnational Dekadal Rainfall and Anomaly Indicators

Delivering dekadal rainfall indicators for French Guiana's subnational administrative units, produced by the World Food Programme using CHIRPS satellite imagery and GEFS forecasts. It tracks 10-day, 1-month, and 3-month rainfall totals alongside long-term averages and percentage anomalies. The data is updated six times per month to transition from short-term forecasts to final observations.

Use Cases

• Monitoring agricultural drought conditions by analyzing the 3-month rainfall anomaly percentage (r3q)
• Short-term water resource planning using the 10-day rainfall forecast (rfh) filtered by the type column
• Climate trend analysis by comparing current dekadal totals (rfh) against long-term averages (rfh_avg)

Strengths

• Includes n_pixels column to indicate the number of input pixels used for each administrative aggregate
• Uses standardized WFP Pcode references for joinability with other humanitarian datasets
• Provides nine distinct rainfall indicators including long-term averages and anomalies

Limitations

• Relies on CHIRPS satellite-derived estimates which may vary from local ground-station rain gauges
• Data status is fluid; records in the 'type' column are overwritten as forecasts are replaced by preliminary and final products

Provenance

Source

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

Collection Method

Aggregation of Climate Hazards Group InfraRed Precipitation satellite imagery and GEFS short-term forecasts

Freshness

Updated six times monthly on a fixed schedule (1st, 6th, 11th, 16th, 21st, and 26th).

Geography

French Guiana