Renee's fiftieth birthday was in July, which is why we planned it for the backyard. Her husband Dennis had been asking me for weeks if I could do the meat — I said sure, I had a menu in mind, I'd bring the grill. About thirty people, they figured. They'd set up tables under the big oak and we'd do it right.

What they had not figured on was the kind of rain that came through that afternoon.

I'm talking about a real storm. Not the slow, ambiguous drizzle that makes people look at their phones and say "might pass." This was the kind where the sky goes the color of old pewter around two o'clock and by three you've got lightning close enough to count the seconds. I was loading my truck when the first serious drops came down. By the time I'd backed into Dennis's driveway, the rain was sheeting across the road.

I stood in the garage with Dennis and looked at it. He said, "We can move everything inside."

I said, "How many people are coming?"

He said, "Thirty. Maybe thirty-five."

I told him thirty-five people weren't going to fit in his house in any comfortable way, and besides, I had two full pork shoulders and a rack of ribs with Judy's sauce I'd planned to finish on the grill, and I wasn't about to put those in his oven.

He said, "So what do we do?"

I told him to find me a tarp.

We ran a line between the oak tree and the corner of the garage overhang — Dennis on a ladder in the rain, me on the ground holding it taut — and we got that tarp up in about fifteen minutes. Not pretty. Slightly diagonal. The rain hammered on it loud enough that you had to speak up to be heard underneath. I moved the grill to the dry edge, got my coals going, and set up like I'd planned.

People started arriving around four. Some of them pulled up, saw the tarp situation and the rain and the general chaos of it, and came in anyway. A few turned around. Honestly, the ones who left were probably the smart ones — the ones who stayed were the ones who meant it, who'd been looking forward to this and weren't about to let weather take it from them.

There were maybe eighteen of us under and around that tarp. Dennis's neighbor Al pulled his own folding chair up next to the grill and kept me company for a while. Renee was inside for most of it but came out twice to check on things and both times got wet anyway and laughed about it.

Here's what happened with the food, which is the part I didn't expect: the shoulders came out better than they had any right to.

My usual worry with long cooks is keeping the lid open at the wrong moments — checking the temperature, adding fuel, turning the meat. Every time you lift the lid you lose heat and smoke and have to wait for the chamber to build back up. But that afternoon, I didn't lift the lid much at all. The rain made staying out there less pleasant, so I checked when I needed to and stayed inside otherwise. The coals burned slow and steady under the tarp, the temperature held more consistently than I usually manage on a normal afternoon, and the smoke — this is the part that surprised me — the smoke was thick and present in a way it usually isn't.

Al noticed it first. He said, "Something smells serious."

I think what happened was the humidity kept the smoke close to the meat instead of dispersing. I don't know if that's the actual science of it. But the ring on those shoulders when I pulled them was deeper than usual, and the bark was set hard and almost black at the edges, and when I pulled the meat it came apart in long heavy strands that had taken on color all the way through.

We ate at folding tables under the tarp with the rain still going. Someone had brought a battery radio that mostly worked. Renee made a speech at some point that nobody could fully hear because the rain picked up right when she started talking, which made her laugh so hard she had to stop.

Al had two plates. He pointed at the second one and said, "This is the rain. This is what the rain did."

I don't take much credit for it. I set up what I could, the storm did the rest, and the food was what it was. But I've thought about that afternoon a lot since. About the people who stayed and the people who left. About how a party of thirty that becomes a party of eighteen loses something — the crowd, the variety — but gains something too. The ones who stayed wanted to be there. That changes a room. Or a yard, or a backyard under a slightly diagonal tarp.

Dennis told me afterward it was the best party they'd thrown in years. He said it with some amazement, like he was still trying to figure out why.

I think I know. Some things get better when they get harder. Not all things. But a cookout in the rain, with the right people staying and the lid kept closed and the smoke doing what smoke does — that's one of them.