When I’ve been giving my weather report to the #Breakfastclub I usually include the pressure. My handheld anemometer gives pressure in inches of mercury and in HectoPascales (hPa). Average pressure is around 1013 hPa or 29.92 inches. The hPa scale is an SI (System International) and luckily the hPa scale is identical to the millibar (mb), the former means of defining pressure. To be honest, I prefer using mb.
A few days ago, I nearly swore on the air when I was talking through GB3IW, I was reading out the pressure and it was 1042mb. I don’t think I have ever seen it that high. Even today, at around 0630 it was still up around 1038mb.
I use a web site https://www.gosportweather.co.uk to calibrate my anemometer, even as I write this, the pressure is 1039mb. Strangely, whilst my anemometer will measure in terms of Mercury to two decimal places, but just a whole value for mb. It’s mildly frustrating but I got used to it.
What I meant to add was that I am assuming that the high pressure is contributing to the clear air, especially this morning. I thought the moon was particularly bright, which gave rise to this morning’s picture. I thought it was rather nice. I could also see a surprising number of stars, especially considering the level of the light pollution in the town. Still, I thought it was a very nice scene.