GrowingSmaller

Thank you.

My first post. I am interested in pressure too and a complete beginner. I have searched the web but can not find a good intro to reading pressure maps like the one found here at the Met Office. I understand that the basic contour lines indicate pressure, but can't make sense of the coloured lines with triangles or circles on them. Can anyone help here? I have found a forecast map of the jet stream here. Is there any way to correlate the stream with the lines on the air pressure map?