• Members 2 posts
    May 14, 2018, 10:33 a.m.

    Hi there, I was wondering if historic weather was a possibility? The MetOffice app, for example, shows the last 6hrs of actual data (rather than predictions), which I find useful in combination with forecasts. I often use the last few hours of real readings to see that, yes, there is rain actually falling over Ireland and the weather is swirling in my direction (Wales), so it might stop or it might keep going, but I know it's really there and really travelling my way. I understand there's limitations on various data (non-commercial use, etc) and I wouldn't know where to start in looking for other sources, but I thought I'd express my interest. The app is so well put together - more than the obvious forecasting, it's interesting to be able to see various layers together (wind direction in relation to high and low pressure, or waves in relation to wind direction, for example). Thanks for all your work!

  • May 15, 2018, 7:55 p.m.


    I'm working on historic weather right now but it's not so clear cut. There are two types of historic data:

    1. Historic predictions where the data used to initialise the simulation is based on measured data. The updates for GFS is every 6 hours, so historic data at 00, 06, 12, and 24 hour UTC will be based on measured data. For GDPS, it is at 00 and 12 hours UTC. This data is nice since it's consistent with the future predictions. There will be high resolution data in the future that will improve the historic data.

    2. Actual measured data, like radar and satellite imaging. I have worked on radar data for the USA and have had it in the app but it needs more work before release.

    I haven't seen any measured data for wind that will be able to be used in the app.

    Cheers, Duane.