This map displays the Fire Weather Index (FWI) derived from weather observations taken at solar noon, when the sun is at its peak directly overhead. The derivation came from the Weather Guide for the Canadian Forest Fire Danger Rating System (details referred to here).

Slide the bar below to the right to see future FWI and to the left to view past FWI. Zoom in and out of the map using the mouse. [Data source: GWIS]

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