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AlertWatch World

Public information. Clearer perspective.

Official alerts, made easier to understand.

AlertWatch World organizes public alert information from authoritative sources into clearer maps, dashboards, and explanations.

Open Weather Alerts

Weather is the first live AlertWatch module. Additional public-alert categories will be added as they are developed and verified.

Available now

Weather Alerts

Explore published weather alert records with the context to make sense of them.

Open Weather Alerts
  • See the pictureInteractive maps and severity filters help you explore current alert records.
  • Look closerLatest Alerts, country summaries, Marine information, and Waterspout-related alerts provide more detail.
  • Follow the historyGlobal Alert Activity shows changes in published worldwide alert records over time, independently of your current filters.

The purpose

A clearer way to read public alerts.

Public alerts arrive from different agencies, in different formats. AlertWatch brings those records together and organizes their locations, alert types, and severity for easier exploration.

We add context to help you understand what you are seeing. The issuing authority remains the source for official instructions and updates.

Current Weather coverage

Direct U.S. and Canadian sources, plus worldwide coverage.

The default Worldwide view combines direct U.S. and Canadian records with international coverage from WMO/SWIC feeds, including marine alert information.

The direct U.S./Canada view includes records from the U.S. National Weather Service and Environment and Climate Change Canada. Coverage varies by source and country.

How AlertWatch works

From public sources to useful context.

  1. Collect

    We collect alert information published by authoritative public sources, keeping its connection to the issuing agency.

  2. Organize and check

    We normalize records for clearer presentation and run validation checks before publishing them. These checks support data consistency; they do not independently confirm conditions on the ground.

  3. Present with context

    Maps, filters, source attribution, and freshness information help you explore the records and understand their limits.

Reading the numbers

More records do not mean more danger.

Alert counts reflect how information is published as well as what is happening. Warning practices and geography differ. One event may produce separate language records, agency updates, or alerts for several marine areas and products. Source coverage also varies.

Country alert counts are not a ranking of danger or safety.

A count is a starting point for exploration. Read the alert details, affected area, and official instructions before drawing conclusions.

Source transparency

Know where information comes from.

AlertWatch preserves source attribution and displays freshness information so you can see who issued a record and when the available information was updated. Delays or gaps can occur.

  • U.S. National Weather ServiceDirect U.S. weather source
  • Environment and Climate Change CanadaDirect Canadian weather source
  • WMO/SWIC international feedsInternational weather alert coverage