These four-panel progs from the PSU eWall show the relative humidity (RH%)at 700 mb in the lower left-hand panel.  Below are the progression of forecast progs from the AVN 12Z run on 10/26/06, valid 06Z 102706 - 06Z 102806.  Click on the images for a larger view.

The prog above shows the RH% at 50% over Caribou at 06Z 102706.  

The prog above shows the RH% now at 30% over Caribou at 12Z 102706.

The prog above shows the RH% again at 30% over Caribou at 18Z 102706.

The above prog shows the RH% still at 30% over Caribou at 00Z 102806.

The final prog above shows the RH% still at 30% over Caribou at 06Z 102806.