The code at https://github.com/K2DLS/noaacap looks like a good start on grabbing the relevant Weather Alerts from https://alerts.weather.gov.
For my current location I am using https://alerts.weather.gov/cap/wwaatmget.php?x=OHC055&y=1 or https://alerts.weather.gov/cap/wwaatmget.php?x=OHZ013&y=1. Changing the parameter y=1 to y=0 will yield the atom/xml feed instead of the html.