Cyclone Intensity & Structure Index

Overview

This pillar assesses the real-time strength and organization of a tropical cyclone. It provides a single, powerful index to gauge a storm's destructive potential beyond its simple category rating.

What It Does

The index synthesizes critical data points like minimum central pressure, maximum sustained wind speeds, and structural symmetry from satellite imagery. It uses the established Dvorak technique to quantify a storm's organization. This creates a comprehensive score that reflects the system's current power and potential for rapid changes.

Why It Matters

A storm's structure is a leading indicator of its future intensity. This pillar helps identify cyclones poised for rapid intensification or weakening, offering an edge over predictions based solely on its official Saffir-Simpson category.

How It Works

First, we collect real-time data on central pressure and wind speeds from reconnaissance aircraft and official advisories. Next, satellite imagery is analyzed using the Dvorak technique to assess cloud patterns and eye formation. These metrics are then weighted and combined into a single index score, updated every six hours.

Methodology

The index is a weighted score: 40% Minimum Central Pressure (in mb), 40% Maximum Sustained Wind Speed (in knots), and 20% Structural Score. The Structural Score is derived from the Dvorak T-number (scale 1 to 8) and a qualitative assessment of eye wall convection from microwave satellite imagery. Lower pressure and higher winds generate a higher index value.

Edge & Advantage

It provides a more nuanced view than the headline category, helping you spot undervalued or overvalued risks in intensity prediction markets.

Key Indicators

• Minimum Central Pressure

  high

  A primary indicator of storm strength; a lower pressure signifies a stronger cyclone.

• Dvorak T-number

  high

  A score based on satellite imagery that measures a storm's structural organization.

• Eye Wall Definition

  medium

  A clear, well-defined eye indicates a mature and powerful storm, prone to maintaining strength.

• Radius of Maximum Winds

  low

  Indicates the size of the storm's most intense core, affecting the scale of its impact.

Data Sources

• NOAA National Hurricane Center (NHC)

  Provides official advisories, pressure, wind, and position data for Atlantic and East Pacific storms.

• Joint Typhoon Warning Center (JTWC)

  Issues tropical cyclone warnings for the Pacific and Indian Oceans.

• GOES & Himawari Satellites

  Geostationary satellites providing the raw visual and infrared imagery for Dvorak analysis.

Example Questions This Pillar Answers

• → Will Hurricane 'X' make landfall as a Category 3 or higher?
• → What will be the peak sustained wind speed of Typhoon 'Y' in the next 48 hours?
• → Will the central pressure of Cyclone 'Z' drop below 940 mb before landfall?

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