I seem to recall from my school days that an area of low pressure would be filled by higher pressure being drawn into it. I wonder with some curiosity how areas of low pressure develop in the first place, but more puzzled by the statement on a forecast I heard this evening that the current low causing the storm (Brendan) has deepened by 24mBar in the last 24 hours. How does a low get lower? Where does the air get sucked to, to make the pressure drop, because all the surrounding air should be at a higher pressure and should lessen the low.
"Man is the best computer we can put aboard a spacecraft... and the only one that can be mass-produced with unskilled labor. " -Wernher von Braun
It's a global-scale system, so it isn't simply about individual areas of low or high pressure. They form as a consequence of atmospheric heating and cooling on that global scale. I find the weather quite fascinating. One day I'll go storm chasing in the US Midwest.