Fig. 4: Changes in tornado-housing unit impact potential.
From: Changes in tornado risk and societal vulnerability leading to greater tornado impact potential
The 25-year mean annual EF1+ tornado days from A from 1973 to 1997 and B 1998–2021 on an 80-km grid is provided along with housing unit (HU) density maps on a 100-m grid for the years of C 1980 and D 2020. Bold (black) outlined counties denote those that are within the 95th (Mid-South) or 5th (Southern Plains) percentile ranking for changes in tornado days from 1980 to 2020. The probability of exceedance (POE) curves for the combination of 1980 risk and exposure (gray line) and 2020 risk and exposure (black line) for regions east of the Continental Divide are provided (E). Panel F provides POE curves for the Southern Plains (blue lines) and the Mid-South (red lines) regions for the years 1980 (dashed line) and 2020 (solid lines).
