Severe Weather Events (Core Feature, Included)

Tomorrow.io provides real-time coverage of government-issued severe weather events across the United States, Canada, and Europe. These events are sourced from official agencies, including:

• The U.S. National Weather Service (NWS)
• Environment Canada
• The European Network of National Meteorological Services

These alerts complement Tomorrow.io’s own proprietary and blended weather models and are fully integrated into the platform and API.

Types of Severe Weather Events Covered

The following types of alerts are commonly included:

• Thunderstorms
• Hurricanes and tropical storms
• Winter storms
• Floods
• Fog and low-visibility events
• Extreme temperatures
• High wind events
• Marine hazards
• Other significant weather threats reported by national agencies

Accessing Severe Weather Alerts on the Platform

🌐 This feature is available to all platform users.

To view:

1. Go to the Map View
2. Toggle on the Severe Weather Events layer
3. Click on any alert shape to view full details in the side panel, linked to the source:

Severe Weather data can also be used in Insights and Alerts to trigger actions or notifications:

Alerts by Severity

You can now refine Severe Weather Event (SWE) alerts by selecting the severity level most relevant to your operations. This helps reduce noise and ensures you are only notified about events that meet your risk threshold.

When to use

Use severity filtering when:

• You only want to be notified about high-impact events
• You need to reduce alert volume for operational teams
• You want alerts aligned with your organization’s risk tolerance

How to use

To configure severity for Severe Weather alerts:

1. Go to Alerts
2. Create a new alert or edit an existing one
3. Select Severe Weather Events (SWE) as the alert type
4. Choose the relevant weather event type
5. Use the Severity dropdown to select one or more levels
6. Complete the remaining alert configuration and save

Severity levels explained

Severity reflects the potential impact of a weather event:

• Extreme – Life-threatening or highly dangerous conditions
• Severe – Significant disruption or damage possible
• Moderate / Minor – Lower-impact events

Severity is defined by official issuing agencies such as NOAA and equivalent international bodies.

Severity vs. urgency

Severity and urgency are separate attributes used in government-issued alerts:

• Severity = how impactful the event is
• Urgency = how soon action is required

Example: An event can be high severity but not immediate, or urgent but lower severity.

API Access

Developers can retrieve and filter Severe Weather Events through the Tomorrow.io API.

• Refer to the Severe Weather Events API Documentations for integration instructions
• Events can be queried by location, type, severity, and issuing agency

Questions?

If you need assistance using or configuring this feature, contact our team at support@tomorrow.io.