I queried Atlanta center and Atlanta approach.  At the point I marked on the attachment, I simply asked what they saw on my route.  I got back "moderate to severe across your horizon, cleared to deviate left".  I repeated "left?".  He replied "left".   Sometimes, the message is just that clear.   Blue sky appeared to the east and we had an uneventful, un-wet, un-bumpy flight all the way in.   I've been really impressed how much assistance is now given despite busy IFR loads.  I've had nothing but excellent and pro-active help from JAX and ATL and especially various approach controllers in Alabama and other southern states.