Even four days out, there already seem to be substantial differences
between the 18Z operational run and its predecessor. For example, over
southern Norway, the pressure at T+102 seems to be about 15mb higher, at
1025mb rather than 1010mb. Something could be up.
I've put in an OCD tag to make it easy for people to avoid this thread.

--
John Hall
"Acting is merely the art of keeping a large group of people
from coughing."
Sir Ralph Richardson (1902-83)