Mean Monthly and Annual Precipitation
Western Canada

Statistic: 30-year average total precipitation 
Time period: 1961-1990
Time interval: monthly
Spatial format: grid
Data format: ARC/Info ASCII GRID

 Projection: Geographic
Spatial resolution: 1.25 arc-minutes (2 kilometers)
Spatial Extent: Western Canada
Units: Millimeters
Date created: November 2002
Methods: The PRISM modeling system and Gaussian filter resolution enhancement. See FGDC-compliant metadata for details. 

Examples 
Mean annual precipitation, entire region
Mean annual precipitation,
Southern British Columbia
Features
  • Reviewed and approved by Environment Canada
  • Incorporates topographic effects on precipitation
  • Captures rain shadows in great detail
  • Includes coastal and lake effects on precipitation
  • Accounts for the varying ability of terrain features to enhance precipitation
  • Consistent treatment and spatial quality control of station data
  • "Universal" geographic (latitude/longitude) projection allows conversion to any other coordinate system
  • Data format allows for easy import into ESRI's GIS products, as well as MAPINFO and Intergraph's GeoMedia

Data used in analysis

  • 1,619+ Stations
  • 1,531 Environment Canada stations
  • 38 BC Hydro stations
  • 50 Supplementary stations, including snow courses and remote storage gauges
  • Many US border stations
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