Normal barometric pressure is typically around 101.325 kPa / 1013.25 mbar / 760 mmHg / 29/921 inHg. Pressure rarely increases or decreases more than 1 inch of mercury (3.386 kPa / 33.86 mbar / 25mmHg) above or below the 30-inch mark unless the weather conditions are extreme.Know More
The highest ever recorded pressure on Earth was on December 31, 1968, at Agata Lake in Siberia, Russia when the weather conditions were clear and extremely cold at minus 50.8 degrees Fahrenheit. The recorded pressure was 108.38kPa / 1083.8 mbar / 812.92 mmHg / 32.01 inHg.
Many people suffer from migraines and headaches that are associated with rising and falling barometric pressures. Low air pressure means that there is less weight pushing down and the air is rising and cooling, which means that there are clouds forming. High air pressures means that there is more weight pushing down and so the air is sinking, which leads to less humidity and a warmer temperature. Falling barometric pressure is usually associated with either thunder in hot weather, wet weather, windy conditions or some kind of precipitation. Rising barometric pressure is usually associated with fairer weather and typically indicates that there will not be any storms that day. Clear skies are also associated with high barometric pressure.Learn more about Weather Forecasts
The rainy season in Playa del Carmen lasts from June to November, with most activity occurring between August and October. However, the rain storms are usually short in duration.Full Answer >
Barometric pressure of under 29.50 inches of mercury at sea level is considered low. At sea level, a normal barometer reading is between about 29.70 inches of mercury and 30.20 inches.Full Answer >
Temperature affects air pressure by causing the air to either become more or less dense, which expands or lowers its pressure. Warm air is less dense than cold air, and as air becomes less dense, its pressure increases.Full Answer >
A front is a boundary between air masses that leads to a low pressure system as the atmosphere attempts to even out the temperature contrast. If there is enough moisture in the air, the uplift as these two air masses collide causes rain. If the temperature differential is large enough, the collision leads to thunderstorms, according to NOAA.Full Answer >