This is admittedly quite niche (as I work on a balloon experiment) but I really appreciate how the nullschool map shows the 10 mbar level (5-7 would be even better if course)

Awesome! Our data, like wind, is for ground level applications (we don't have data for higher altitudes). But we do have proprietary lightning data which may be of interest to you. If you go to the top left corner and change the focus from "General Focus" to "Severe" you will see a new collection of layer options related to severe weather. There you can see actual lightning strike data, as well as lightning forecast areas. Most airports use our lightning data!

All of the data, including the AI endpoints (Phrase API - https://www.xweather.com/phrases-api), and mapping tools were built using our weather API and MapsGL SDKs. I don't know the exact number of hours but its been worked on for about a year. You could spin up a really basic mapping site like this using the SDKs in a matter of hours.

Thanks. There are quite a few cool projects out there. Someone just shared a link to a collection of free weather maps: https://fmhy.pages.dev/misc#climate-weather

In the future we will also be merging another project into this app which is a collection of data from personal weather stations across the country. That data is really cool because it can fill in coverage gap. https://www.pwsweather.com/map/?ob=temps

This is true for many free weather APIs out there. But our weather API is global so we’re not just passing through a single government feed. There’s quite a bit of engineering to normalize all of the data sources. Japanese alerts for example are just XML feeds. All the sources update on different schedules, and have different forecast ranges, so it's a challenge to make sure the best forecast is returned at request time.

Some of our data is proprietary. The lightning strike data is from our own lighting detection network. We also offer the only hail forecast model available which was developed in house :)

Oh thanks that altitude slider is very interesting. Makes me want to see a 3d visualization.