From the discussion of the 5AM NHC advisory on Hurricane Ian:
It should again be stressed that there is still significant uncertainty in the track of Ian, especially in the 3-5 day time frame, and users should not focus on the details of the track forecast at longer time ranges.
Discussion from the NHC 5AM advisory on Tropical Storm Ian:
Ian is expected to remain a major hurricane when it moves generally northward across the eastern Gulf of Mexico during the middle of the week, but uncertainty in the long-term track and intensity forecast is higher than usual. Regardless of Ian’s exact track and intensity, there is a risk of dangerous storm surge, hurricane-force winds, and heavy rainfall along the west coast of Florida and the Florida Panhandle by the middle of the week, and residents in Florida should ensure they have their hurricane plan in place, follow any advice given by local officials, and closely monitor updates to the forecast.