What is Barometric Pressure?

Barometric pressure, also known as atmospheric pressure, is the force exerted by the weight of the air in the Earth’s atmosphere. It is measured in units such as inches of mercury (inHg) or millibars (mb). Changes in barometric pressure play a crucial role in predicting weather conditions, including storms, tornadoes, and other severe weather events.

When barometric pressure drops, it often signals the approach of storm systems, including tornadoes and hurricanes. Low pressure allows air to rise, leading to cloud formation and precipitation. A rapid drop in pressure can indicate the likelihood of strong storms, making it an important factor in weather forecasting and storm preparedness.

Conversely, high barometric pressure is associated with stable, calm weather. In areas of high pressure, air descends, reducing cloud formation and leading to clearer skies. Monitoring barometric pressure trends can help homeowners and businesses prepare for severe weather conditions, ensuring that storm shelters and safe rooms are ready for use.

For those relying on tornado shelters or safe rooms, understanding barometric pressure changes can provide early warning signs of approaching storms. Many modern weather stations and mobile apps track pressure fluctuations, allowing individuals to take necessary precautions well before severe weather strikes.