Send Weather Alerts to Your Mobile Phone with OpenWeatherMap and SIGNL4

This n8n workflow automates the process of fetching weather data and sending critical weather alerts to your mobile phone via SIGNL4. It allows you to stay informed about specific weather conditions without manually checking forecasts.

What it does

1. Triggers on a schedule: The workflow can be configured to run automatically at specified intervals (e.g., every hour, daily). It can also be manually triggered for testing.
2. Fetches weather data: It uses the OpenWeatherMap API to retrieve current weather conditions for a specified location.
3. Evaluates weather conditions: An If node checks the fetched weather data against a predefined condition. This condition can be customized to look for specific weather events (e.g., temperature below a certain threshold, rain, snow).
4. Sends alerts via SIGNL4: If the weather condition evaluates to true, an alert is sent to your mobile phone using SIGNL4, ensuring you receive timely notifications for critical weather changes.

Prerequisites/Requirements

• n8n Instance: A running n8n instance (self-hosted or cloud).
• OpenWeatherMap Account: An API key from OpenWeatherMap to access weather data.
• SIGNL4 Account: A SIGNL4 team ID to send mobile alerts.

Setup/Usage

1. Import the workflow:
   • Copy the provided JSON code.
   • In your n8n instance, go to "Workflows" and click "New".
   • Click the "Import from JSON" button and paste the copied JSON.
2. Configure Credentials:
   • OpenWeatherMap:
     • Locate the "OpenWeatherMap" node.
     • Click on "Create New Credential" and enter your OpenWeatherMap API Key.
     • Configure the node with your desired city and country.
   • SIGNL4:
     • Locate the "SIGNL4" node.
     • Click on "Create New Credential" and enter your SIGNL4 Team ID.
     • Customize the alert message as needed.
3. Configure the If node:
   • Locate the "If" node.
   • Modify the condition to match the specific weather event you want to be alerted about. For example, you might want to check {{ $json.weather[0].main === 'Rain' }} for rain alerts or {{ $json.main.temp < 273.15 }} for temperatures below 0°C (273.15 Kelvin).
4. Configure the Trigger:
   • Schedule Trigger: Set the desired interval for the workflow to run (e.g., every 1 hour, once a day).
   • Manual Trigger: Use this for initial testing and debugging.
5. Activate the workflow: Once configured, activate the workflow to start receiving automated weather alerts.