Be careful of the source of your station report. In the US, station report pressures related to aviation are in units of "inches mercury" ("Hg) with the precedi

Be careful of the source of your station report. In the US, station report pressures related to aviation are in units of "inches mercury" ("Hg) with the preceding 2 or 3 omitted. Here is a resource: https://aviationweather.gov/metar https://aviationweather.gov/metar In the grand scheme of weather, it does not make much difference, as the change in pressure in time or location is more important than the units.