SIGMETs and Volcanic Ash Alerts (Aviation Customers)

SIGMETs and Volcanic Ash Alerts are critical for aviation operations, providing early warnings for regional weather hazards that may impact flight safety. These alerts are available only to aviation customers with the Aviation feature enabled on their Tomorrow.io account.

Alert Types

SIGMETs (Significant Meteorological Information)

Issued for severe conditions affecting aircraft safety:

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

• Coverage: Global, by FIR (Flight Information Region). Note: the entire CONUS (Contiguous United States) is grouped as a single region for alerting purposes.

• Details: Includes hazard type, severity, altitude range, movement, and validity period

Volcanic Ash Advisories

Provided by global Volcanic Ash Advisory Centers (VAACs):

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

• Details: Includes volcano name, ash height, movement, affected airspace, and advisory timing (new or all-clear)

How Alerts Work

• Trigger: Alerts are sent when a new advisory is issued, updated, or cleared

• Delivery Channels: Email, in-app notifications, push, and optionally SMS or WhatsApp

• Deep Link: Each alert includes a link that opens the relevant map layer focused on the impacted region or volcano

• Alert Duration: Each AIRMET, SIGMET, and Volcanic Ash alert is valid for up to 4 hours from the time of issuance.

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, VAAC, or Basin)

4. Choose one or more alert types: SIGMET or Volcanic Ash

5. Select your preferred delivery channels

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