Latitude → 0°: no Coriolis, air runs straight down the gradient
Friction → 0: wind parallel to isobars, low on the left (north), right (south)
Friction up: wind crosses the isobars into the L, out of the H
Tight gradient: closer isobars, faster wind
Curvature: same spacing, faster round the H than the L
Drop a parcel, friction 0: inertial loops, never settles
3-D: inflow → rising → outflow over the L; sinking → outflow over the H
Model: 1013 hPa + one Gaussian per system · wind = steady pressure gradient + Coriolis + linear friction, speed scaled by the gradient-wind solution for the local isobar curvature · f = 2Ω sin φ · parcels integrate the same forces from rest · 3-D: friction-layer convergence → vertical motion by continuity, outflow aloft returns it, vertical ×100 · schematic, not a forecast · no data leaves the page.