I'm trying to get a feel for the "normal" range of atmospheric
pressure.

Wikipedia tells me that the highest and lowest ever recorded
barometric pressures are 108.57 kPa and 86.996 kPa,
respectively.  It also tells me that "standard" atmospheric
pressure is 101.325 kPa.  What it does NOT tell me (nor
does anywhere else) is what the "normal" range is; that is,
if a good, strong thunderstorm passes through, what can
I expect the pressure to be?  Likewise, in a typical high
pressure area, what can I expect the pressure to be?

I'm trying to develop a water depth gauge, and if possible,
I'd like to get some feel for the variation of pressure based
on atmospheric variations.  The highest to lowest cited
above would represent a 2.2 meter(!) fluctuation in the
depth of a body of water, if one were basing the depth on
the pressure at the bottom.  Needless to say, that
kind of variation would render the information useless.

Normal diurnal cycles are <.5 kPa, which corresponds
to approximately 5 cm of water depth.  No info on
typical changes outside those variations, however.

Differential measurement is NOT an option for this
application.

Mike H.

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