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Environment and Climate Change Canada canada.ca

Government of Canada launches improvements to tornado and thunderstorm warnings to help keep people in Canada safe

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Announcement

Today, Environment and Climate Change Canada confirmed the launch of improvements to its severe thunderstorm and tornado warnings, helping people in Canada receive clearer, more timely information to stay safe during severe weather events.

Today, Environment and Climate Change Canada confirmed the launch of improvements to its severe thunderstorm and tornado warnings, helping people in Canada receive clearer, more timely information to stay safe during severe weather events.

Canadians rely on timely information to stay safe in volatile and potentially dangerous weather conditions. Environment and Climate Change Canada provides this information by issuing severe thunderstorm and tornado warnings with life-saving guidance, where and when it is needed most. To further improve this service, the Department is enhancing how it warns for convective weather:

  • Forecasters can now target the area that they predict will experience the highest impacts and issue severe thunderstorm and tornado warnings to people only in that area. They do this by drawing a shape around the targeted areas. These shapes are called ‘polygons’. These warning polygons are more targeted than the previous broader forecast zones.
  • Semi-automated text generation enables forecasters to produce storm information simultaneously in both English and French, allowing convective weather warnings to be issued faster than ever before.
  • Multiple warning polygons can be in effect in the same area at the same time, even overlapping one another. This gives forecasters the flexibility they need to track different threats and target safety information accordingly.

    • These changes apply to severe thunderstorm and tornado warnings only. Other weather alerts, like heat warnings or severe thunderstorm watches, continue to be issued according to pre-determined alert zones.

    This is an extract. The publication continues at the source.

    Read the original at the source: https://www.canada.ca/en/environment-climate-change/news/2026/08/government-of-canada-launches-improvements-to-tornado-and-thunderstorm-warnings-to-help-keep-people-in-canada-safe.html

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    Provenance

    Organization
    Environment and Climate Change Canada — imported from official source
    Official source
    https://api.io.canada.ca/io-server/gc/news/en/v2?dept=departmentoftheenvironment&sort=publishedDate&orderBy=desc&publishedDate%3E=2021-07-23&pick=50&format=atom&atomtitle=Environment%20and%20Climate%20Change%20Canada ATOM
    Imported
    October 03, 2026 20:43
    Versions
    1 recorded
    Identity
    https://www.canada.ca/en/environment-climate-change/news/2026/08/government-of-canada-l...

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