Thank you, adding the header works:
msg.url = "https://api.weather.gov";
msg.headers = {};
msg.headers['USER-AGENT'] = 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36';
return msg;