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Hello Windy team.
The archives for the satellite picture is really good, really useful.
It will be absolutely fantastique if you could do the same ideally for the rest of your web site. entirely. I have no idea the size of the storage space you need to store one year of weather forecast.
If it is way to much, could you do the main stuff. Wind, pressure, rain accumulation, wind accumulation...
thanks
Adrien -
@KataLind
Hi,
The problem is that wind, precipitation, pressure… are forecasts, not observations like are satellite and radar data.
Storing them as historical data would be unwise.
Do you think the weather forecast for today will be exactly what you will see? -
@idefix37 I understand the problem. didn't think about it that way and it is absolutely correct.
But we can assume that the forecasts of the European model for the present day (24h) is almost the reality. So if you store the forecast of the European model of the present day, every day, it's almost the truth and definitively much better than nothing at all.
Also it can be use to see how an event that you have experience or seen on the news as been predicted, how it looks on prediction.
So this historical data wouldn't be unwise. Not perfect I give it to you, but good enough and also interesting to see how the forecast predicted a past event.
thanks -
@KataLind
Strictly speaking, the publication of historical weather data should only be based on observations from weather stations. Radar and satellite data could also be used, but they are very rare before the 1970s.
But collecting all this data everywhere in the world is an enormous undertaking.In fact, this is what the ERA5 program from ECMWF does. The historical data is "assimilated," just as it is for the initialization of the model forecasts calculation program every day. So this weather Center is able to publish data and maps based on past observations.
I think Windy could also offer these maps. A French weather website (only in French language) does it. Showing for example a map based on 1940 observations but you can change the date and parameters.
Also it can be use to see how an event that you have experience or seen on the news has been predicted, how it looks on prediction.
Not sure to understand exactly what you would like, but in Windy you can check whether a forecast is "strong" or "extreme" compared to the normal weather conditions in the area at same date in the year.
So in the Extreme forecast layer, the ERA data is used to assess how extreme a forecast is.
