The Energy Information Administration (EIA) recently changed the weather forecast methodology for one of its most important energy models — the Short-Term Energy Outlook (STEO) — and while we talk about the effects of weather on energy markets fairly often (571 times in the past 12 years, or about once a week, but who’s counting?), we rarely take a step back and explain how those weather forecasts are used. In today’s RBN blog, we look at different approaches to weather forecasting, the recent change made by the EIA, and how the new approach might affect our understanding of EIA forecasts.