I'm In Utah, and we were driving north at about 2:45 am. In the west, we saw a flash of bright green light in the sky. it lasted for less than 2 seconds. The sky is super cloudy, and it snowed earlier. I am completely blown away by this and am super curious as to what it could be. there was no sound accompanied with the flash, and we saw for a moment a glow, in the n coming fromsomeones back yard. there's no wind, the night is completely still. Any ideas?