There's reduced data available for initial conditions, so I wonder how that will effect things:

* https://apnews.com/article/weather-forecasts-worsen-doge-tru...

* https://www.independent.co.uk/news/world/americas/us-politic...

A good book on the history of forecasting, The Weather Machine: A Journey Inside the Forecast:

* https://www.andrewblum.net/the-weather-machine-2