WeatherNotificationSystem is a Python application that sends text and/or email notifications based on warnings and alerts published by the National Weather Service's public API (https://www.weather.gov/alerts). WeatherNotificationSystem is designed to be run as an AWS Lambda function which can be triggered on a schedule by EventBridge.

WeatherNotificationSystem uses the following AWS services:

• Lambda runs the python application using Lambda's python 3.8 environment
• EventBridge acts as a cron job to trigger the lambda on a set schedule
• DynamoDB stores events that were already sent out to prevent duplicate messages
• SNS is the notification service that sends out texts and emails
• CloudFormation to represent the above infrastructure as code and to automate the provisioning of AWS services

If running locally, use the package manager pip to install dependencies (boto3 and requests libraries).

pip3 install -r requirements.txt

If running on AWS Lambda, create a Layer using the requests.zip file (boto3 is included with Lambda by default, so only external dependency is the Requests library).

aws lambda publish-layer-version \
    --layer-name requests \
    --description "Requests library" \
    --content S3Bucket=lambda-layers-us-east-2-12345,S3Key=requests.zip \
    --compatible-runtimes python3.8

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

GPL-3.0