Surge vs Pressure & Wind

Scales (cropped for comparability): Surge −2 to +2 m (left) · Pressure 980–1050 mb · Wind Speed 0–70 kn · Wind Arrows direction + speed (placed at a fixed band near the top of the surge axis; arrow points in the direction the wind is blowing to, stem length scales with speed, head is a thin spread V). Plotted only when wind direction shifts by more than 10° from the previously plotted arrow, so steady winds give a sparse trace and frontal shifts give a dense one — sparse stretches mean a steady wind, not missing data. Surge is from Wadgate Ledge (location WL). Pressure / wind are from Fort Massac (FTMassac). When more than one right-axis variable is active, each uses its own axis positioned on the right edge; the primary left axis always shows surge.