Question

[Maggie Kahman]

I like to read through Jeffs winter weather forecasts and every now and then i come across the word "ensembles". In the thread i was reading it had a link that took you to one. Although i am smart enough to know what is in the left hand column, I came across one i didnt know. In 850 hPa Z (I made that up), what does 'Z' represent?



http://www.emc.ncep.noaa.gov/gmb/ens/fcsts/ensframe.html