Flood Index (Premium Layer)

Tomorrow.io’s Flood Index provides localized flood risk forecasting using a combination of global and regional hydrological models. This tool supports preparedness and planning for fluvial (river), pluvial (rainfall-based), and streamflow-driven flooding.

🔒 This is a premium feature. For access, contact your Tomorrow.io Account Team or sales@tomorrow.io.

Overview

Tomorrow.io employs hourly model updates and regionalized forecasting to track flood conditions across global river networks. These models integrate:

• Real-world observations
• Historical return period analysis (e.g., 10, 50, 100, 500, 5000 years)
• Proprietary statistical and physical models
• Continuous refinement based on incoming data

⚠️ This index does not cover coastal or storm surge flooding, including areas near bays, estuaries, and tidal bodies of water.

Key Parameters

• Hourly data available for CONUS (Contiguous U.S.)
• Daily data available for global regions outside CONUS

Flood Data Product Layers

Viewing Flood Risk in the Platform

To explore flood data in real time:

1. Go to the Trends tab
2. Toggle on the Flood Index or Stream Flow layer
3. View risk zones visualized on the map (layer shown in purple)

Flood Index:

Stream Flow:

Accessing via API

Flood Index and streamflow data are available via the Tomorrow.io Weather API.

• Use fields such as floodIndex, streamflow, etc.
• See our API documentation for request format, field descriptions, and usage examples

Need Help?

If you’re a customer and need help using or integrating flood data, please contact your Account Team or reach out to support@tomorrow.io.