Core Mechanics
Simulate cyclone genesis based on atmospheric fluid dynamics.
- Click the right-edge Intensity Profile handle to slide the chart in or out; drag the handle vertically to reposition. TC/ET use intensity colors; EX is purple.
- Click INITIALIZE to generate a random disturbance.
- Use Settings to configure spawn points and environment.
- SST supplies surface heat; subsurface OHC and mixed-layer depth determine resistance to storm-driven cooling.
Shortcuts
SPACEPause / Resume
SQuick Restart
VHide/Show Panel
1 / 2 / 3Speed Control
RShow/Hide Post Radar (Base Reflectivity)
DShow/Hide Post Radar (Radial Velocity)
Wind Radii Structure
LAYER: STRUCTURAL ANALYSIS
Visualizes the extent of wind fields in four quadrants (NE, SE, SW, NW). Critical for determining the size and destructive potential of the system.
64 KT (Hurricane Force)
Core destruction zone
50 KT (Storm Force)
Severe weather zone
34 KT (Gale Force)
Outer circulation limit
Steering Flow (500hPa)
LAYER: SYNOPTIC FORCING
The primary driver of cyclone movement. Cyclones move around High Pressure ridges (clockwise in N.Hemisphere) and towards Low Pressure troughs.
Interactive Mode (God Mode)
Drag environmental H/L to relocate their combined circulation and update steering; the cyclone itself is not moved. Double-click the map to add one manual high. Double-click an environmental H/L or the map again to remove the added high.
850mb Relative Humidity
LAYER: THERMODYNAMICS
Indicates the moisture content available for the storm. Moisture is the fuel for convection.
Green Areas (>60%)
Favorable for development. Look for deep moisture wrapping marked as green on the humidity map.
Yellow/Brown Areas (>50%)
Dry Air Intrusion (SAL). Can choke the storm's convection and weaken the system.
Foehn Effect
When the moist airflow from a tropical cyclone crosses mountain ranges, it undergoes adiabatic warming during its descent on the leeward slope, forming dry and hot descending air currents that cause humidity to decrease.
Environmental wind shear
Use the wind-shear layer button to show the environmental 200–850 hPa wind-vector difference in knots, scaled by the Vertical Shear setting (100 = 100%). Colours show magnitude; arrows point along upper wind minus lower wind. This point-field diagnostic excludes cyclone feedback, random shear events and storm-area averaging, and is not the storm's effective shear or its intensity-loss modifier. Turn the layer off to stop its sampling.
Moving arrows indicate shear direction, not air-parcel trajectories or wind speed. Magnitude is encoded by colour. Reduced-motion preferences disable this animation.
The thermometer toggles synthetic SST (°C), including geographic cold wakes. This is surface temperature, not OHC: OHC integrates water warmer than 26°C through depth (kJ/cm²). Equal SST can have different reservoirs and cooling responses. No live observations are used.
100m Surface Wind
LAYER: BOUNDARY LAYER
A high-resolution vector field showing the immediate surface circulation. Useful for pinpointing the exact Low Level Circulation Center (LLCC).
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Visualizes inflow angles and convergence.
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Helps identify when a wave organizes into a closed circulation (Depression stage).
The Dangerous Semicircle
In the Northern Hemisphere, the right side of a moving cyclone has the strongest winds. This is where the rotational wind speed adds to the storm's forward motion speed (V_rot + V_motion).
Forecast Track
LAYER: PREDICTION MODEL
Projected path based on current steering flows and beta-drift calculations. Click any track point to show the projected path at the point, and you can generate a warning map!
Center Line
Most probable track. Not a guarantee.
Cone of Uncertainty
The historical error margin. The center of the storm will remain within this cone 60-70% of the time. The storm can impact areas outside the cone.
Observation Post
LAYER: GROUND TELEMETRY
Deploy ground stations to gather localized telemetry. Essential for verifying satellite estimates and analyzing internal structure.
Deployment Strategy
- Open Settings menu.
- Choose a marked city / region from the list, or use Custom to enter a callsign, longitude and latitude.
Open the cloud/sun button for a three-day station outlook, including weather, temperature and peak gusts. Tropical cyclone alerts use current distance and the next 72-hour forecast. Simulation only.
10-Min Sustained Wind
Standard meteorological measurement used by JMA. Smoothed data to filter out momentary gusts.
Weather & Pressure
Real-time Mean Sea Level Pressure (MSLP) and precipitation rate monitoring.
Base Reflectivity (Z)
Rain intensity visualization. Use Shortcut [R] to toggle. Critical for analyzing spiral rainbands and eyewall structure.
Radial Velocity (V)
Doppler effect. Use Shortcut [D] to toggle.
Blue/Green = Inbound,
Red/Pink = Outbound.
ICWC Agency Products
LAYER: ADVISORY GENERATION
The Independent Cyclone Warning Center (ICWC) is a tropical cyclone monitoring agency affiliated with STROM INC, providing tropical cyclone analysis and forecasting services worldwide. Accessible via the ICWC button when a track is selected.
Warning Graphic
Standard operational map showing past track, forecast cone, wind radii, and key city impacts.
Wind Speed Probability
Showing the cumulative probability of 34kt (Tropical Storm) or 64kt (Typhoon) winds at any location over the next 72 hours.
Station Observations
Retrieves historical telemetry logs for a specific time step. visualizes localized wind barbs, MSLP trends, and weather conditions relative to the storm's position.
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STROM_INC // BUILD 2026
