Haines Index Calculator

The Haines Index is a measure used by meteorologists to assess the potential for wildfire growth. It is calculated based on low-level stability and mid-level moisture. A higher Haines Index indicates more favorable conditions for large wildfire growth.

Historical Background

The Haines Index was developed in the 1980s by meteorologist Donald Haines. It is widely used in fire weather forecasting to assess the risk of fire spread under different atmospheric conditions.

Calculation Formula

The formula for the Haines Index is:

\[ \text{Haines Index} = \text{Low-Level Stability} + \text{Mid-Level Moisture} \]

Example Calculation

If the low-level stability is 2 and the mid-level moisture is 3, the Haines Index would be:

\[ \text{Haines Index} = 2 + 3 = 5 \]

Importance and Usage Scenarios

The Haines Index helps in predicting fire behavior and is especially useful for fire management agencies to plan resources and strategies. A high Haines Index (5 or 6) indicates a significant potential for fire growth, which requires heightened awareness and preparation.

Common FAQs

1. What does a Haines Index of 6 indicate?

   • A Haines Index of 6 indicates the highest potential for large wildfire growth due to unstable atmosphere and dry conditions.

2. Can the Haines Index predict wildfire occurrence?

   • No, the Haines Index does not predict wildfire occurrence but assesses the potential for fire spread under existing conditions.

3. How often is the Haines Index calculated?

   • The Haines Index is typically calculated daily, particularly during fire season, to monitor changing conditions that affect fire behavior.

This calculator provides an easy way to determine the Haines Index, aiding in fire risk assessment and management planning.