Climate Change Canada - Decreasing Extreme Rainfall Trends at 220 Weather Stations - IDF Curve Updates

There is less extreme rainfall observed at hundreds of climate stations across Canada. Therefore based on Environment Canada data, storms are not more severe, and updating Intensity-Duration-Frequency curves is not required in most areas. The map below shows the short duration rainfall frequency trends.

Canadian Extreme Rainfall Trends - 15 Minute Duration
(click on 'dot' symbol for climate station name)

Extreme Rainfall IDF Curves
15 Minute Rainfall Extreme Data Trends

Extreme rainfall trends in Canada (Environment Canada Engineering Climate Datasets):

Static Maps:

Interactive Map:

Table Summaries:

Chart and Table:

Long-term Station Table:

Environment Canada Denies Changes:

Contradicting Insurance Industry Claims: