Centering DIV that fades

HTML

<!-- Stream starting soon alert popup -->
        <div class="streamStartingSoon" id="infor">
                <font color="white"><strong>Stream will begin shortly!</strong></font>
              </div>

CSS

.streamStartingSoon{
  width: 250px; 
  height: 30px; 
  background-color: #65d1d4;
  opacity:0.9;
  text-align: center; 
  vertical-align: middle; 
  line-height: 30px; 
  position: absolute;
  top: 250px;
  margin: auto;
  border-radius: 5px;
}

JavaScript

jQuery("#infor").delay(4000).fadeOut("slow");