Désolé Softin j'ai carrément oublier de te répondre, Voici ce que ça engendre: “At short range, most impact is on jet level winds and temperatures, partly because many of the aircraft reports are at this level, but also because this is an active part of the atmosphere,” ECMWF scientist Bruce Ingleby said. In other words, the biggest impact will likely be noticed by the computer models in the jet stream level data about 30,000 feet high in the sky. In personal experience this usually leads to some error in timing and broad scale features in the atmosphere, especially beyond 4 days. But within a few days out this usually isn’t as big of a factor because we have satellite and radar data to fill the void. Ironically, just last year a test was run without AMDAR data to simulate this exact scenario and the data was similar to what we’re discussing here. There was some reduction in the quality of data, mainly in the northern hemisphere for high altitude temperatures and wind. Research from the past decade has shown that the biggest impact might ultimately be to high-resolution short term models that help us within 36 hours of an event. We use these high-res models at Bay News 9 and will keep an eye on any inconsistencies that might arise. All this being said, we’ll continue to offer very accurate forecasts, but there will be some bumps along the way and we won’t know for sure what the reduction in accuracy will be until possibly a month or two down the road. It’s only been a couple weeks and within our weather center we think we might have noticed a few small differences this week in some of the large-scale data but it wasn’t anything we couldn’t adjust to.