what two unitsn of air pressure are used in weather reports?

Answer 1

Well, you are touching on things that still is in a state of flux. The two most common at the moment are inches of mercury and millibars.

However, the last dozen years or so, most educational units have been increasingly using the term hectopascals as the more correct term for millibars. One hectopascal equals one millibar. This is considered proper and more correct according the the metric system.

Well, if you went by the international standards of units, the even more correct (and used by some metric countries) is actually kilopascals. The argument is that the SI units should have values between 1 and 1000. And since one standard atmosphere would be 1013.25 hPa that atmospheric pressure should be kilopascals which would make it 101.325 kPa.

What is interesting, is you can actually use any unit and convert to that unit you wish to use The most interesting was actual on one of my meteorology courses where we had to convert inches of mercury to stone per acre. You had to first figure out the question was asking for the English stone weight which is 14 pounds. After that the conversion was rather simple. Just math.

Answer 2

In the Met report(METAR) supplied to aircrafts every half an hour, the pressure is given in millibar and Inches of mercury.So these two units are used for aviation purpose.

Answer 3

Millibars, and inches of mercury (barometer) - maybe mph wind speed might be considered "pressure" too

Answer 4

Highs and Lows?Milibars?

Answer 5

Barometric and gradient