Blue light traveling south to North in a straight line

I am up near the US / Canadian border and was on my deck looking east when I saw a blue light that looked like it was shimmering go from south to North in a straight line then disappeared. It certainly crossed the US Canadian border. It was slower than a shooting star, saw it for probably under 3 seconds, but way faster than any plane etc.. about 5 minutes later I saw what looked to be high powered flashlights in the sky hitting the clouds going all over the place, assumed someone else nearby saw it and was shining a super powerful flashlight up in the sky.