How do I get Info from a webpage?

Question

For example, taking the latest tropical weather outlooks from the NHC website; how would you do that with HTML/JS?

Answer 1

https://www.nhc.noaa.gov/ has some RSS feeds which should be far better structured and useful for you than web scraping HTML. https://www.nhc.noaa.gov/aboutrss.shtml explains them. Weather outlook data is included in their RSS feeds.

You could download, parse, and pull the information you want out of those RSS feeds in many languages. You could run JavaScript using nodejs or use Python, Java, c#. All these languages come with standard XML parsers so getting the information you're after shouldn't be hard.

Answer 2

Use their api
https://api.weather.gov/points/{lat},{lon}

Eg. New York City is https://api.weather.gov/points/40.7128,-74.006