COD's Storm Machine ?

Was playing around with COD's Storm Machine website (acute SDS) - a lot of really usefull functions there and I really like the ability to regionalize the weather maps :

Have a question to any of you who use or are familiar with this website - I've been trying to get thr dew point depression function (ie 700mb) to work but so far no luck - only get a blank map. Any idea's on how to make it work ?

Thanks for any help
Jon Miller
Just have to keep messing around with it, and trying different times/etc..

BTW... I thought "Storm Machine" was NIU, not COD... Or are those the same?
Thanks, I stand corrected , it is NIU . I've tried a lot of different combinations - nothing seems to work - so will keep trying.
Jon Miller