On Mon, 31 Dec 2018 15:43:35 -0000, NY wrote:

> Some time I'll have to take the base station (*) of my weather station
> outside when it's windy and see what variation in pressure it records,

Not sure it will but the pressure changes on a window due gusts are
enough to make the glas flex. When we had single glazing and plain
glass windows about 4' x 5' the center of that pane would move about
1/2" in response to gusts to 50 60 mph with a mean speed of 40+ mph.
The double glazing with internal glazing bars forming six "panes" per
top and bottom sash-a-like window still move but not as much, only
about 1/4".

> though I'm not sure what electronic averaging there is between pressure
> sensor and digital display. Indoors it's shielded by the house walls so
> gusting isn't an issue.

Wouldn't be so sure, with a gale or more blowing outside the pressure
inside in reduced by a few millibars. Venturi effect I guess.
Sometimes the wind just stops, goes from 40 - 50 mph sustained to <
10 mph in minutes, there is a noticeable step up in the internal
pressure as recorded by the weather stations pressure sensor.

> I wonder if I could see a measurable difference between the weather
> station on the ground floor and in the attic.

Ought to be able to. floor level ground floor to apex of roof above
first floor won't be far short of 27' or 1 millibar.

--
Cheers
Dave.

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