We investigated the accuracy of operational medium-range ensemble forecasts for 29 Atlantic hurricanes between 2007 and 2019. Upper-level troughs with strong wind promoted northward movement of hurricanes over the mid-latitudes. For hurricanes with upper-level troughs. relatively large errors in the prediction of troughs result in large ensemble spreads. https://www.helpmesdicalsuppliers.shop/product-category/oxygen-concentrator-2/