Clouds building

It was sunny most of the day but there is supposed to be a possible thunderstorm this evening. One of the classes went out on the playground to make shadows and reflections with mirrors and prisms. To the south the sky was black and to the east these enormous cumulous clouds were building. The sun went away and it got quite cold so they finished class inside. Surprisingly we just got a few drops. Cheyenne might have gotten more since they are over the range to the east.
We'll see if we get anything of note tonight. It was snowing last Thursday. 
The extra is the perspective of the clouds above the school.
I will get to the Irish session tonight.