Damage from a landfalling hurricane is rarely symmetric. One side of the storm consistently produces stronger winds, higher water and more tornadoes, and the reason is straightforward addition.
How forward motion changes the wind
A hurricane's winds circulate around the center, and the whole system also translates across the ocean at its own forward speed.
On the side where the circulation blows in the same direction as the storm is moving, the two combine and the ground experiences their sum.
On the opposite side they oppose each other, so observed wind is the difference. A storm moving quickly can show a large contrast between the two flanks.
Why the same side pushes the most water
Storm surge is produced by wind driving water toward the coast ahead of the storm, and the strongest onshore flow occurs where the circulation and motion align.
That side also has the longest fetch of wind blowing across water toward land, which builds both surge and waves.
On the other flank the wind often blows offshore, which can lower water levels there while the opposite side is flooding.
Where the tornado threat concentrates
Tornadoes in a landfalling hurricane occur mainly in the outer rainbands rather than near the center, and they cluster in the same forward-right region.
Friction slows the wind at the surface more than aloft as the storm crosses the coast, sharply increasing the change of wind with height in that quadrant.
The resulting shear supports rotating cells within the bands, which is why tornado warnings during a hurricane often appear far from where the eye comes ashore.
Why coastline shape modifies the pattern
Surge depends heavily on the geometry of the shore and the slope of the sea floor, since shallow water lets a given wind pile up far more depth.
Bays, inlets and river mouths funnel water and can amplify surge well beyond what the open coast nearby experiences.
A storm approaching at an unfavorable angle to a concave coastline can therefore produce severe flooding in places the wind pattern alone would not predict.
What this means for preparation
Being on the weaker side of a storm reduces exposure to wind and surge, but it offers no protection from rainfall, which is distributed differently.
Inland flooding frequently causes fatalities well away from the coast and from the strongest quadrant, often after the winds have subsided.
Local surge and evacuation guidance already accounts for the asymmetry along with coastline shape, which is why it should override any inference drawn from the track alone.