How does the Landfall Recognition work?
Since landfall will often be in-between forecast verification times, this presents a problem of linearly extrapolating forecast winds between forecast points. I.E. if a storm’s 36 hour forecast is to be 100 miles offshore with top winds of 125 MPH and it’s 48 hour position is forecast to be 100 miles inland with top winds of 75 MPH, then a linear extrapolation would calculate a 100 MPH storm at landfall. Turning Landfall Recognition ON will force the system to maintain the intensity of the storm until landfall. Landfall is defined (by the system) as 5 contiguous hours over land.
