Fig. 2. As in Fig. 1 but showing the continental U.S. annual landfall frequency and U.S. landfall power dissipation index.

The landfall frequency (top row) includes only storms whose lifetime maximum wind speeds exceed 40 kts (21 ms⁻¹). The landfall power dissipation index (bottom row) is in units of m³s⁻³. The linear regression lines in the bottom row are from ordinary linear regression.