Barometer readings

Great watch, love the features but am confused. I've set the barometer according to weather.com and in the course of one day the barometer was off from the 30.08 reported to 30.35. I reset it and the same happened the next day. It did predict the coming of a storm but should I be recalibrating that often? I read another posting on the altimeter and experienced the same thing. Did the big watch experience the same thing?

I'm not upset but rather quite happy I've got this toy on my wrist. Who would expect so much so small! Very cool. Thanks.

[Tyler]

The barometer changes constantly. Pilots actually have to adjust the altimeter several times during a flight. It is just the nature of barometric pressure.