Some warmer and wetter weather ahead for Fieldays at Hamilton's Mystery Creek

The largest agricultural show in the southern hemisphere gets underway tomorrow morning.

More than 100-thousand people and over 12-hundred exhibitors are expected, at the four-day event -- now its 57th year.

WeatherWatch's Philip Duncan says thundery downpours will hit the area tonight.

He says tomorrow morning should be more settled, but heavy showers are possible tomorrow afternoon, and more showers and possible thunder are expected on Thursday and Friday.