> 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?
> 

http://www.noaa.gov/ 
If it's weather related, they've got it.

A quick poke around thier site and I found this:
http://www.ncdc.noaa.gov/oa/samples/lcdmonthly.pdf
looks like 1996 in Minnesota, I see a range of 28.7 to 30.6 (inches of mercury)

I'm sure a little digging will net some more information.

> 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.
 
Would depend on the application, two meters worst case might be good
enough for some apps.

Good Luck,
-Denny

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