UFO Saucer was seen hovering beyond trees as we were driving towards home and then disappeared.

I was riding with my Grandmother from high school one bright spring day and we were going down the street where my house is located on.  We were one block from my house when the radio started messing up.  Now, my Grandmother had only AM Radio, but the reception was never this bad.  Then, my Grandmother noticed something very odd in the sky beyond the trees.  She alerted my attention to it and I was shocked when I saw it.  It was the biggest thing I had ever seen.  It was in the typical UFO shape, but this one had like a half-dome on the bottom of it.  I have included a link to the image of it HERE.  We didn't think anything of it and she finished taking me home.  Well, she soon forgot about it, but I didn't and I kept reminding her of the encounter.  She didn't want me to keep mentioning it until, a few days later, she called me over to her house and she showed me a newspaper article where some people reported a sighting in Lake City, Florida only a few days after we saw that UFO in TAMPA, FLORIDA!
Time and date are approximate.  PD