If you see a big white balloon in the sky over central Tucson, don't be surprised. It's a weather balloon that's being released twice a day from the National Weather Service's southeast Arizona office at the University of Arizona.

The weather balloons have been going up from Tucson International Airport or Davis Monthan Air Force Base for decades but the NWS moved this part of its operation to the UA beginning on Monday June 4, 2007. Officials say the new system along with reducing maintenance and operations is saving about $100,000.00 annually.

National Weather Tucson