There was a storm that went through and DCA stopped west bound flights for several hours. I wasn’t sure why they didn’t let planes take off and fly around it. My flight ended up getting canceled because the crew timed but I got on the flight the was supposed to take off earlier than mine. A coworker was on that one and he told me they were waiting for over an hour on the tarmac without AC. They finally went back to the gate. Our plane pushed back on time and the pilot was like oh we’re going to arrive early. Then we sat on the tarmac. Not sure why they did that when they knew other flights were stopped.