Comoros Subnational Rainfall Indicators: Dekadal CHIRPS Data and Forecasts

Comoros subnational rainfall indicators provided by the World Food Programme, derived from CHIRPS v2 satellite imagery and CHIRPS-GEFS forecasts. The data tracks dekadal (10-day) precipitation, long-term averages, and anomalies aggregated by administrative units. Records are updated multiple times per month to transition from forecasts to final observations.

Use Cases

• Drought monitoring using the rfq column to identify percentage deviations from normal rainfall
• Agricultural season tracking by comparing r1h and r3h rolling totals against long-term averages
• Early warning systems using the type column to integrate CHIRPS-GEFS forecasts into disaster response

Strengths

• Standardized Pcode references for administrative units
• Includes 1-month and 3-month rolling aggregations (r1h, r3h)
• Metadata provided for pixel count per unit via n_pixels

Limitations

• Satellite-derived estimates may vary from local rain gauge data
• 10-day temporal resolution masks daily rainfall intensity and extreme weather events

Provenance

Source

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

Collection Method

Aggregation of satellite imagery and in-situ station data

Freshness

Updated frequently with forecasts issued on the 6th, 16th, and 26th of each month and final observations published mid-month.

Geography

Comoros