SIGMETs and Volcanic Ash Alerts (Aviation, Premium Layer)

The SIGMETs and Volcanic Ash layer provides aviation customers with real-time alerts for severe weather conditions and volcanic activity affecting flight operations. These alerts support safer routing, planning, and in-air decision-making.

🔒 This feature is available to aviation customers only. For access, please contact your Account Team or sales@tomorrow.io.

Alert Types

SIGMETs (Significant Meteorological Information)
Issued for serious weather phenomena that may impact aircraft safety:

• Hazards Covered: Convective thunderstorms, turbulence, icing, volcanic ash, IFR (Instrument Flight Rules) conditions, and mountain obscuration

• Coverage: Global, segmented by FIR (Flight Information Region)

  • The entire CONUS (Contiguous United States) is treated as one alert region

• Alert Content: Hazard type, severity, altitude range, movement, and validity period

Volcanic Ash Advisories
Issued by Volcanic Ash Advisory Centers (VAACs):

• Regions Covered: Washington, London, and Toulouse VAACs (additional centers planned for 2025)

• Alert Content: Volcano name, ash cloud height, movement direction, affected airspace, and advisory status (new/updated/all-clear)

How Alerts Work

• Trigger: Alerts are issued when a new SIGMET or VAAC bulletin is published, updated, or canceled

• Delivery Channels:

  • Email

  • In-app notifications

  • Push notifications

  • Optional: SMS and WhatsApp

• Deep Links: Each alert includes a link to the map layer centered on the affected region

• Alert Duration: All alerts are valid for up to 4 hours from issuance

⚠️ The SIGMET and VAAC alert system is designed for operational awareness only. Always refer to official aviation authority communications for flight-critical decision-making.

How to Set Up Alerts

1. Go to the Alerts tab in the Tomorrow.io platform

2. Click Add New Alert

3. Select a region type:

   • FIR (Flight Information Region)

   • VAAC

   • Basin

4. Choose the alert type(s):

   • SIGMET

   • Volcanic Ash

5. Select your preferred delivery channels

6. Save your alert

Need Help?

For assistance configuring alerts or accessing aviation-specific layers, contact your Account Team or support@tomorrow.io.