Guinea Subnational Rainfall: Dekadal Precipitation and Anomalies

Guinea subnational rainfall indicators provided by the World Food Programme (WFP) based on CHIRPS v2 and CHIRPS-GEFS satellite imagery. The data includes 10-day (dekadal), 1-month, and 3-month aggregations of precipitation and anomalies for administrative units. It features a rolling update cycle that transitions from forecasts to preliminary and final observations.

Use Cases

• Drought monitoring by analyzing 3-month rainfall anomalies (r3q) relative to long-term averages (r3h_avg)
• Agricultural season tracking using 10-day rainfall (rfh) and 1-month rolling totals (r1h)
• Early warning systems utilizing CHIRPS-GEFS short-term forecasts when the 'type' column indicates forecast status

Strengths

• Integrates CHIRPS v2 satellite imagery with in-situ station data
• Standardized WFP Pcode references for subnational administrative units
• Includes n_pixels column to quantify the data source density for each aggregate

Limitations

• Satellite-derived estimates may contain bias compared to local rain gauges
• Data status transitions from forecast to final, requiring users to filter by the 'type' column for historical accuracy

Provenance

Source

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

Collection Method

Satellite imagery aggregation and forecast modeling

Freshness

Updated multiple times per month (1st, 6th, 11th, 16th, 21st, 26th) with forecasts and observations.

Geography

Guinea