Out of town, sister's surgery

My oldest sister Irma is having an elective (yet life-saving) surgery on Friday. I'm going to be leaving later today (hopefully not too much later) to mom's house, where I will trade cars with her. Tomorrow morning we leave about 9 or 10am to San Diego, where she has a 1:30pm appointment. We'll be staying in a hotel Thursday night and she'll be in surgery first thing Friday morning. We should be back by Tuesday at the latest. Prayers would be much appreciated. Thank you.