Description: Absolute Track Error is defined as the great-circle distance between a storm’s forecast position and its observed position (i.e., NHC Best Track) at the forecast verification time. Absolute Track Error values are shown along the y-axis in nautical miles (nm), with values closer to 0.0 indicating more accurate absolute track forecasts. Forecast hours are shown along the x-axis. This plot shows the average Absolute Track Error from all storms that formed in the North Atlantic during the 2023 Hurricane Season. Note that three storms were excluded: AL01 (Unnamed Subtropical Storm), AL02 (Bret), and AL03 (Cindy). AL01 was an unnamed subtropical storm that formed in January 2023 (no hurricane models were run). AL02 and AL03 are excluded because they formed prior to implementation of HAFS-A and HAFS-B on 27 June 2023.



Description: Absolute Track Error is defined as the great-circle distance between a storm’s forecast position and its observed position (i.e., NHC Best Track) at the forecast verification time. Absolute Track Error values are shown along the y-axis in nautical miles (nm), with values closer to 0.0 indicating more accurate absolute track forecasts. Forecast hours are shown along the x-axis. This plot shows the average Absolute Track Error from all storms that formed in the East Pacific during the 2023 Hurricane Season.