What Is Barometric Pressure and Why Is It Important?
Barometric pressure, often referred to as atmospheric pressure, is the pressure of the atmosphere at a given point in time. It is measured by devices known as barometers and can be expressed in different units such as pascals, hectopascals, or inches of mercury (Hg). Meteorologists commonly refer to barometric pressure as either “high” or “low” pressure. Generally speaking, when barometric pressure is high, the atmosphere is stable and more pleasant weather is expected. When barometric pressure is low, the atmosphere is more dynamic and less predictable weather is likely.

Knowing the barometric pressure can be critical in forecasting short-term weather patterns. For example, a sudden drop in barometric pressure may indicate that a storm is moving in and that you should be prepared. Conversely, a sudden rise in barometric pressure may mean that a period of dry weather is on the horizon. By knowing the barometric pressure, you can prepare for whatever weather may come your way.

What Is the Barometric Pressure Today?
The barometric pressure will vary depending on the location and time of day. Generally speaking, the barometric pressure at sea level hovers around 1,013 millibars (mb). However, around the world and especially in mountainous areas, barometric pressure can change significantly in a very short time span.

In the United States, the barometric pressure is heavily influenced by air masses that move from the Arctic, the Pacific, and the Gulf of Mexico. During the spring and summer months, the barometric pressure is typically higher because the atmosphere is more stable and warm air is dominant. During the fall and winter months, the barometric pressure is generally lower because cold fronts cause weather systems to be more dynamic.

How Do I Check the Barometric Pressure in My Area?
To find the barometric pressure in your area, you can simply check the weather report online or on TV. The barometric pressure is typically reported as either “high” or “low.” You can also use a barometer, which is an instrument used to measure local barometric pressure. A barometer measures atmospheric pressure using restricted mercury, and will usually display the pressure readings in millibars or inches of mercury.

In summary, barometric pressure, also known as atmospheric pressure, is the pressure of the atmosphere at any given time. Knowing the barometric pressure in your area can help you predict the weather and prepare for any stormy conditions that may be on the way. The barometric pressure is typically reported in the weather report or can be measured using a barometer.