I have started this thread in order to have a place to ask questions about weather phenomena and features we see in models. In particular, I'll see some discussion happening about an upcoming weather event, but may not understand all of what I'm reading. I don't want to muck up the main discussion with general questions so I thought that a separate thread could be helpful for us with less knowledge. Of course, this isn't an atmospheric sciences course condensed into a forum thread, but maybe a few tidbits of info will be shared that we can benefit from.
I'll start with one that relates to our current situation. I hear a lot of about split flow of the polar and subtropical jets. What is the best way to identify the split flow? Have I identified it correctly in the 250 mb winds chart below, or would you look elsewhere? (500 mb) and do you look for certain heights (like 540 dm in the 500mb chart) to identify the polar jet?