Pressure Tendency Calculator

This calculator determines the rate of change of atmospheric pressure, which is essential for weather forecasting and understanding atmospheric dynamics.

Input Parameters

Calculation Results

Pressure Tendency

-- mbars/hour --

Positive values indicate increasing pressure, while negative values indicate decreasing pressure.

Calculation Formula

Pressure Tendency = (Final Pressure - Initial Pressure) / Time Interval

Where:
- Initial Pressure: Starting atmospheric pressure in mbars
- Final Pressure: Ending atmospheric pressure in mbars
- Time Interval: Duration between measurements in hours

Pressure Tendency Calculator Usage Guide

Learn how to use the Pressure Tendency Calculator and its working principles

How to Use the Calculator

  1. Enter the Initial Pressure in mbars (hectopascals). This is the atmospheric pressure at the beginning of the measurement period.
  2. Enter the Final Pressure in mbars (hectopascals). This is the atmospheric pressure at the end of the measurement period.
  3. Enter the Time Interval in hours. This is the duration between the initial and final pressure measurements.
  4. Click the Calculate button to compute the pressure tendency.
  5. The result will be displayed in mbars per hour, indicating how quickly the pressure changed.

Understanding Pressure Tendency

Pressure tendency is a key indicator in meteorology. A positive value suggests high pressure is building, often associated with fair weather. A negative value indicates low pressure is forming, which can lead to stormy conditions. The rate of change provides valuable information for weather forecasting.

Example Calculation

If the initial pressure is 1013.2 mbars, the final pressure is 1015.5 mbars, and the time interval is 6 hours, the pressure tendency would be:

(1015.5 mbars - 1013.2 mbars) / 6 hours = 2.3 mbars/hour

This positive tendency suggests high pressure is increasing, which typically results in stable weather conditions.