Description

Precipitation percentiles represents the accumulated precipitation (mm) for the time period compared to historical information for the same time period. This comparison ranks the current precipitation amount and assigns it a percentile value based on a historic record. Time periods calculated for monthly precipitation percentiles are 1, 2, 3, 6, 9, 12, 18, 24 months. Each ISO week is numbered from 1 to 52 (sometimes 53) within a year. An ISO week starts on Monday and ends on Sunday. Historical record goes back to 1980. The National Agroclimate Series of Derived Indicators (NASDI) products provide a collection of comprehensive and regularly updated datasets on key agroclimatic variables, including accumulated precipitation, standardized precipitation index, and difference from normal temperature, among others. These datasets incorporate both real-time and historical climate information, offering enhanced insight into conditions and trends across Canada’s diverse agricultural regions.

Resources

Name	Format	Description	Link
Pre-packaged GeoTIF files (monthly)	Unknown		https://agriculture.canada.ca/atlas/data_donnees/nasdi/data_donnees/monthly/precipitation_percentile/
Pre-packaged GeoTIF files (weekly)	Unknown		https://agriculture.canada.ca/atlas/data_donnees/nasdi/data_donnees/weekly/precipitation_percentile/
Data Product Specification (English)	PDF		https://agriculture.canada.ca/atlas/data_donnees/nasdi/supportdocument_documentdesupport/en/ISO_19131_NASDI_-_Data_Product_Specification.pdf
Data Product Specification (French)	PDF		https://agriculture.canada.ca/atlas/data_donnees/nasdi/supportdocument_documentdesupport/fr/Série_nationale_indicateurs_agroclimatiques_dérivés_-_SPC_19131.pdf
Precipitation percentiles	Ersi REST		https://agriculture.canada.ca/imagery-images/rest/services/nasdi/precipitation_percentile/ImageServer
Precipitation percentiles	Ersi REST		https://agriculture.canada.ca/imagery-images/rest/services/sniad/centile_des_precipitations/ImageServer

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