Update README with accurate app description

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -7,16 +7,17 @@ sdk: docker
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-# UpdraftForcing
+# Updraft Forcing
 
-Interactive browser-based diagnostic model for convective updraft wind shear dynamics.
+A kinematic-diagnostic model for examining how environmental wind shear and mesocyclone intensity drive perturbation pressure and vertical accelerations in convective storms.
 
-Prescribe a convective updraft in a user-defined sheared environment (Weisman-Klemp sounding + draggable hodograph), then diagnose:
+Configure a Weisman-Klemp analytic sounding and drag the hodograph to set the wind profile, then explore:
 
-- **Pressure perturbations** decomposed into linear (shear interaction), nonlinear spin, nonlinear splat, and buoyancy terms (Trapp 2013)
-- **Vertical velocity** diagnosed from a 1-D parcel model with overshooting top
+- **Skew-T log-P diagram** with parcel trace, CAPE/CIN shading, and meteorological wind barbs
+- **Perturbation pressure** decomposed into linear (shear interaction), nonlinear spin, nonlinear splat, and buoyancy terms (Trapp 2013)
+- **Vertical velocity** diagnosed from a 1-D pseudoadiabatic parcel model with overshooting top
 - **CAPE, CIN, LCL, LFC, EL** from the analytic sounding
-- **SRH** (0–2 km, 2–5 km) and **Updraft Helicity** relative to Bunkers right-mover
-- **Vertical vorticity** from a user-prescribed mature-storm rotation profile
+- **SRH** (0–2 km, 2–5 km) and **Updraft Helicity** relative to the Bunkers right-mover storm motion
+- **Prescribed mesocyclone ζ(z)** driving the nonlinear spin pressure term and updraft helicity
 
-Plan views and cross-sections are switchable for all fields.
+Plan views and vertical cross-sections are available for all 3-D fields. Pressure perturbations are solved via a 2-D FFT + tridiagonal Poisson solver on a 100 × 100 × 161 grid (Δ = 100 m).