In article ,
Jon O'Rourke writes:
"John Hall" wrote in message news:Y0HonCBJYc
...
Are those surface temps? It doesn't seem to be made clear. I'd assumed
at first that they must be 850mb temps, and thought "That looks pretty
mild". 
John, EC normally provide two different types of ENS plots. Meteograms
with 2m temperatures and 850hPa EPS plumes. In this case it's the
former. 2m temperatures are very useful but can a bit a little
misleading at times in terms of assessing how cold the air is in depth.
A cold boundary layer due to a week of freezing fog (heaven forbid) for
example would give a sequence of low temperatures but wouldn't
necessarily indicate there's cold air in depth present.
Thanks.
--
John Hall
"Acting is merely the art of keeping a large group of people
from coughing."
Sir Ralph Richardson (1902-83)