I looked out the window and to see a very dark cloudscape. I took a walk outside, with my camera, walked around the house and took photos of what looked like a somewhat threatening sky. A light wind arose and a few splatting raindrops hit my face. I didn't hear any weather warnings either. By the time I came inside and downloaded these photographs the skies were the same as they'd been all day long. A few minutes later the skies darkened, again.
Here is a photo slideshow depicting a few short hours of Nebraska weather: