saucer came across the tree tops in the yard,swayed,then took off across hwy & 1/2 mile beyound then straight down

we were outside just before dark,when we noticed a saucer-shaped object floating about 10 ft above the tree tops. as a breeze came up the ufo wobbled,straightened out & took off across hwy 19/41 for about 1/2 mile,then appeared to have gone down.
minutes later we heard sirens headed in that direction. my mom reported it to the police,only for them to pass it off as a weather ballon. no ballon flies with deliberately direction as this did. saucer had one light that circled the craft,even tho craft was not spinning.