FYI …

… The long-awaited upgrade to the US weather forecast model is here | Ars Technica. (Hat tip, Dave Lull.)

Of course, no model is a perfect replica of the planet, and part of using these models to forecast weather requires us to understand and account for their biases. NOAA says that the cold bias has been reduced by development over the past few months—and development is a continuous process that doesn’t stop when a model goes live. Still, there could be an adjustment period here as forecasters get used to their new souped-up model. At least through September of this year, the old model will still be running in parallel to aid in that transition.