Just Ask Johnhttp://community.local12.com/blogs/just_ask_john_weather_blog/archive/2007/11/02/2120192.aspx Under Pressure   Ruth from Winchester asks: I'd like to know how barometric pressure readings are determined to be high or low. And isn't this somewhat different for each region? What is high or low for this area? It seems that sometimesen-USCommunityServer 2.0 (Build: 60217.2664)