Please integrate the equivalent potential temperature in windy. This map shows the isobars together with the isolines of the equivalent potential temperature in 850 hPa. The equivalent potential temperature is made up of the temperature and humidity at 850 hPa. This is why weather fronts (strong displacement of the equivalent potential temperature) and different air masses can be seen even more clearly here than on the 700 hPa humidity map or the 850 hPa geopotential map.
