Where'd da thermals go bro...

I had a number of people ask why yesterday (and today for that matter) didn't produce much or any clouds or use-able thermals.
The answer is the high pressure (generally subsiding air..remember) and the highly stable air mass.
Very common in winter.

The graph shows the lines intersecting on the LHS of the red line (Environmental lapse rate). Blue thermals.
Also the red line arc's back towards the right above 2500ft...an inversion...of sorts.
Together it spelled poor to non-existent thermals and clouds. I think there were a few clouds late in the day, and below 1500ft you could (I did) feel some weak and small thermals.
That's winter folks...go skiing...I intend to.