To repeat a number of previous posts: The charts posted and often labelled JFF (Just for fun or Just for frustration) are generated ppn type based on raw modelled parameters. They have had let's say a 'chequered' history and their performance should be taken with a big pinch of salt.
I would look as them as a very rough guide and when the time comes (within 48 hours), use the E4 and WRF ppn models as they are high resolution and get a much better handle on events.
Originally Posted by: nsrobins