Good evening.  
After consulting with our meteorologist, we decided to delay all of tomorrow's graduation activities by 30 minutes.  The ceremony will be held outside, even if it rains, unless thunder and lightning become a factor.  Additional procedural adjustments to the ceremony may be made once it starts.  Given the potential for rain, we ask that guests be prepared with rain gear (jackets, hats, umbrellas, etc.) and maybe a blanket or towel, given the distinct possibility of wet seats.