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Show HN: Weather API for non-commercial use

open-meteo.com

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Re: Show HN: Weather API for non-commercial use

#31

Post by meteo-jeff »

cetra3 wrote: post #29

This is great, I'd love to have dive visibility predictions for my webapp based on location: https://divedb.net/ The challenge I've had is the same, the data format that a lot of these sources provide is in "academic" formats like GRIB, NetCDF etc.. and I've spent a not-insignificant amount of time trying to work through all these formats and what they represent.

Do you know an open-data source for ocean visibility data?

I want to integrate regular wave forecasts in the next month, but I am unaware of something that can improve dive visibility.

Re: Show HN: Weather API for non-commercial use

#33

Post by meteo-jeff »

shoto_io wrote: post #25
Leftium wrote: post #3

I've investigated and tried several (free) weather API's for my web app: https://uw.leftium.com . Open-Meteo looks pretty good! The only thing that seems to be missing for me is precipitation probability. The weathercode is sort of a proxy for this... I'm also interested in sunrise/sunset times; direct_radiation is kind of a proxy for this. Kudos for providing optional historical data with the same API call for the f…

Nice app! Could you please include Celsius as option?

Celsius is already the default temperature unit. You can optionally switch to Fahrenheit.

For wind speeds, all typical units are available as well. Let me know if I missed one.

Re: Show HN: Weather API for non-commercial use

#35

Post by ricksunny »

Looks great! I really like the UI to make it clear what can be had from the API - it really facilitates the on-boarding process. Have got a couple of questions if you don't mind? :

• What is the source of the soil moisture data?

• Also can you describe which ET model is being applied and which of its parameter values have to be assumed?

Re: Show HN: Weather API for non-commercial use

#36

Post by cetra3 »

meteo-jeff wrote: post #31
cetra3 wrote: post #29

This is great, I'd love to have dive visibility predictions for my webapp based on location: https://divedb.net/ The challenge I've had is the same, the data format that a lot of these sources provide is in "academic" formats like GRIB, NetCDF etc.. and I've spent a not-insignificant amount of time trying to work through all these formats and what they represent.

Do you know an open-data source for ocean visibility data? I want to integrate regular wave forecasts in the next month, but I am unaware of something that can improve dive visibility.

Dive visibility is actually quite hard to forecast (at least in the areas I dive) and I don't know if there have been empirical studies on it.

Anecdotally I find it's best when the wind is offshore and there is low tidal movement. But there are other factors at play, such as rainfall, etc..

This is one source I found (for wave height): https://www.aviso.altimetry.fr/en/data/products.html, however it was not clear on the website whether it was paid or not.

Another one I had a poke around with: https://www.ecmwf.int/en/forecasts/datasets/wmo-essential (trying to read Grib2)

Re: Show HN: Weather API for non-commercial use

#37

Post by meteo-jeff »

ricksunny wrote: post #35

Looks great! I really like the UI to make it clear what can be had from the API - it really facilitates the on-boarding process. Have got a couple of questions if you don't mind? : • What is the source of the soil moisture data? • Also can you describe which ET model is being applied and which of its parameter values have to be assumed?

• Soil moisture data is based on DWD ICON models with up to 2 km resolution in central Europe.

• ET is based on latent heat flux. This is not the potential evapotranspiration or ET0 reference evapotranspiration. I did not dive deep into the actual radiative transfer model for latent heat flux, but you can find it in the DWD ICON description.

Re: Show HN: Weather API for non-commercial use

#38

Post by meteo-jeff »

syedkarim wrote: post #34

How do your models compare to those from NOAA? https://nomads.ncep.noaa.gov/

The high-resolution NOAA GFS models will soon be integrated as well. Data are integrated seamlessly. The API will automatically select the best weather model for given coordinates. In the US the 2 km NOAA GFS model will then be used as default for the first available 60 hours.

Re: Show HN: Weather API for non-commercial use

#39

Post by Leftium »

shoto_io wrote: post #25
Leftium wrote: post #3

I've investigated and tried several (free) weather API's for my web app: https://uw.leftium.com . Open-Meteo looks pretty good! The only thing that seems to be missing for me is precipitation probability. The weathercode is sort of a proxy for this... I'm also interested in sunrise/sunset times; direct_radiation is kind of a proxy for this. Kudos for providing optional historical data with the same API call for the f…

Nice app! Could you please include Celsius as option?

If you're referring to https://uw.leftium.com/, tap the temperature in landscape mode ;)

The app defaults to F because it gives the more "human" temperature range.

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