Maybe.... it means your gauge is broken. 
I don't know how to convert inches to millibars but the Weather Channel shows 28.56 inches and falling, 41*F, 87% humidity, and wind from ESE @ 12 mph for Shobdon.
Oh yeah, and it's raining.
For my neck of the woods:
32*F and clear
81% humidity
30.24 inches pressure
wind calm
...you may be right there, Larry...

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I've just taken it indoors and partly dismantled it, and the needle doesn't seem to be firmly attached to the bellows/gearing...

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The trouble is...weather stations are installed outside in all weathers....
..whether we like it, or not!...

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Buggar...
Looks like I need another new Weather Station!....

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Paul...weathering the storm.. 8-)...!
Latest: Just checked my local weather conditions and re-calibrated the Barometer section of my Weather Station...
Hopefully its "fixed" now...see how it goes...

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A useful piece of kit for all the Sim Pilots interested in the Real/Sim weather...
...and Motorcyclists; me, who have to suffer it!...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.