Tornado Scenario Simulator

Purchase includes: A digital access key and direct link to the persistent browser-based simulation environment.

The Tornado Scenario Simulator is a high-fidelity meteorological sandbox designed for generating, analyzing, and visualizing procedural storm tracks across high-resolution, real-world geography. Utilizing advanced geometric modeling and Turf.js sine-wave tapering, this tool simulates complex storm lifecycles, authentic wind intensity tiers, and localized damage swaths.

NEW: Outbreak Evolution Features (Update 4-27-26)

• Mesoscale Discussions (MDs): Real-time generation of variable-shape severe weather boundaries. High-intensity outbreaks now feature dashed "Red Box" MDs that outline the primary threat area.
• Large Hail Simulation: New hail report engine that spawns realistic diamond-icon reports (0.75" to 4.50") based on the storm's peak intensity and the day’s risk category.
• Outbreak Logic: Moderate and High-Risk days now feature "Targeted Placement," where tornadoes spawn logically within the risk boundary rather than randomly across the continent.
• Enhanced Custom Pathing: Waypoint plotting has been expanded from 5 points to a massive 20-point system, allowing for long-track, multi-city pathing with realistic heading fluctuations.

Core Simulation Engine

• Procedural Path Logic: Storms feature authentic headings, randomized speed fluctuations, and path "wobbles" to simulate natural meteorological movement.
• Dynamic Wind Fields: Intensity-coded polygons (EF0–EF5) visualize the physical scale. High-end events generate massive "wedge" formations, while lower-end events maintain narrow, "rope" tracks.
• Risk-Governed Scenarios: Simulations are dictated by Marginal through High Risk categories, controlling the frequency of touchdowns and the max potential EF-rating of the event.
• Damage Indicators (DIs): Real-time reports spawn with randomized scatter logic, ensuring indicators populate realistically throughout the wind bands.
• Triangles: Tornado-specific intensity damage (EF0–EF5).
• Circles: Peripheral straight-line thunderstorm wind damage (TSTM).
• Diamonds: Large hail reports (HAIL).

Interactive Tools

• Scenario Area Placement: Click anywhere on the map to "center" a random outbreak over a specific city or neighborhood.
• Multi-Layer Mapping: Toggle between high-resolution Satellite Imagery, Dark Mode, and Light Mode to analyze damage swaths against terrain and infrastructure.
• Data Overlays: Toggle-able visibility for Wind Fields, Damage Indicators, Hail Reports, and Mesoscale Discussions.

Usage Instructions

1. Generate: Launch a random risk-based outbreak or use "Select Scenario Area" to target a specific region.
2. Analyze: Watch the storm lifecycle evolve from a narrow EF-0 touchdown into a jagged, peak-intensity wedge.
3. Review: Inspect individual damage and hail markers for estimated wind speeds and stone sizes.

Disclaimer: This tool is for educational and entertainment purposes only. It is not a real-time weather tracking or life-safety tool. Always defer to official local weather authorities (NWS/NOAA) during actual severe weather events.