<P> In between Rita and Katrina is Hurricane Allen . Allen 's pressure was measured at 899 mbar . Hurricane Camille is the sixth strongest hurricane on record . Camille is the only storm to have been moved down the list due to post-storm analysis . Camille was originally recognized as the fifth strongest hurricane on record , but was dropped to the seventh strongest in 2014 , with an estimated pressure at 905 mbars , tying it with Hurricanes Mitch , and Dean . Camille then was recategorized with a new pressure of 900 mbars . Currently , Mitch and Dean share intensities for the eighth strongest Atlantic hurricane at 905 mbar ( hPa ; 26.73 inHg ) . Hurricane Maria is in tenth place for most intense Atlantic tropical cyclone , with a pressure as low as 908 mbar ( hPa ; 26.81 inHg ) . In addition , the most intense Atlantic hurricane outside of the Caribbean Sea and Gulf of Mexico is Hurricane Irma of 2017 , with a pressure of 914 mbar ( hPa ; 27.0 inHg ) . </P>
what was the lowest barometric pressure for hurricane irma
914 mbar ( hPa ; 27.0 inHg )