Surface chart for 0000Z on December 15, 1986 showing the intense cyclone at its deepest southeast of Greenland. ... Barometric Pressure Records for Select U.S. Cities ...

Understanding atmospheric pressure is vital, newsroom meteorologist Justin Ballard said, because those giant H’s and L’s representing high and low air pressure systems on a weather map are ...

Not only is this a record for Heathrow, beating 1047.3 mb from February 7, 1964, but it’s also the highest barometric pressure recorded in London in more than 300 years of recordkeeping, Burt ...