A blanket of haze from a strong high-pressure system in recent days hangs over the Salt Lake Valley early Monday morning, viewed from Ensign Downs above the Utah State Capitol. The system should start to move eastward Monday night and Tuesday. Southerly winds are expected Tuesday in the Salt Lake Valley, said G. Wayne Brady, a forecaster at the Salt Lake office of the National Weather Service. The temperature reached a high of 63 degrees Sunday at the Salt Lake International Airport, where the low was 29 degrees early Monday. There's a possibility of rain Wednesday in the valleys and snow in the higher mountains. Temperatures will be in the upper 70s Tuesday in the St. George area, Brady said. Monday's lowest temperature was 15 in Randolph.