We had a big storm blow through just before sunset.
You can see the leading edge here.
These pictures don't really do justice to the wind
and the speed of the clouds as they jetted across the Southern sky.
The edge is a cold front blowing into warmer clouds.
This would be the making of a tornado if we saw this in Texas.
But here in Montana, these are just clouds bringing much needed rain.
It ended almost faster than it started.