Description

Shows sub-basin-averaged precipitation from the GEPS ensemble, reflecting the mean (or other metrics) of multiple ensemble members. Useful to understand probabilistic rainfall/snowfall expectations for each watershed. GEPS is ECCC’s ensemble system, running ~20 members globally to quantify forecast uncertainty out to ~16 days. This layer aggregates ensemble precipitation data over sub-basin polygons. The attribute “Average Accumulated Precipitation” often represents the ensemble mean, capturing a more probable average scenario. Operators can use this for risk-based hydrological planning or to gauge confidence in upcoming flood/drought scenarios across different sub-basins.

Resources

Name	Format	Description	Link
CSV	CSV		https://geoportal.gov.mb.ca/api/download/v1/items/7f7096f070414ba9b6095159367ce237/csv?layers=0
GeoJSON	GeoJSON		https://geoportal.gov.mb.ca/api/download/v1/items/7f7096f070414ba9b6095159367ce237/geojson?layers=0
KML	KML		https://geoportal.gov.mb.ca/api/download/v1/items/7f7096f070414ba9b6095159367ce237/kml?layers=0
Shapefile	ESRI Shape		https://geoportal.gov.mb.ca/api/download/v1/items/7f7096f070414ba9b6095159367ce237/shapefile?layers=0
original metadata (https://geoportal.gov.mb.ca)	HTML		https://geoportal.gov.mb.ca/datasets/manitoba::forecasted-basin-average-accumulated-precipitation-geps-384-hrs
ArcGIS GeoService	Ersi REST		https://services.arcgis.com/mMUesHYPkXjaFGfS/arcgis/rest/services/GEPS_SubBasins_Precipitation_Distribution_384_hrs/FeatureServer/0
ArcGIS GeoService	Ersi REST		https://services.arcgis.com/mMUesHYPkXjaFGfS/arcgis/rest/services/GEPS_SubBasins_Precipitation_Distribution_384_hrs/FeatureServer/0

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