Wow--Karen, very nice! They all please me for different reasons.
The trees are like characters in a play, standing on a white stage. Love the colors and marks you've made.
You really nailed that light on the snow in the second one! The regression is lovely, and your palette is very pleasing.
The composition on #3 is terrific--the transparency of the umbrella really works, but I think that one touch of orange light in the window just makes the whole painting work.
And #4 is just...lush
So glad you showed these.