Extreme Values of Atmospheric Pressure
Source: Google Maps
The highest sea-level air pressure ever recorded was 1083.8 mb (32.01 in. Hg) in Agata, Siberia on December 31, 1968; produced by a very cold, dense air mass.
Source: Hurricane Research Division | NOAA
The lowest sea-level air pressure ever recorded was 870 mb (25.69 in. Hg) measured on October 12, 1979 in the eye of Typhoon Tip as it moved over Guam.
Weather Fact: While the air pressure reading in Typhoon Tip was the lowest recorded, the air pressures inside tornadoes are no doubt lower. However, because the winds of a tornado are so strong they destroy barometers, no readings have ever been confirmed.