I was just swapping war stories with a few freinds about rought weather stories and decided I would start the topic.
I think the worst for me in a pilots position was a tie. Once we were departing off of 36 Left at TPA into the face of some nasty weather and making the turnout to the left due to weather around the airport. The airport was surrounded about 80% by popcorn thunderstorm cells. We made a turn out 180 degrees to the left and paralelled a 45,000 foot top cell I would estimate at about 5 miles off the cell. I never felt such convection in my life. We had to fly about 15 miles north to go east to Daytona. Another one was climbing out of San Juan in the 25D N82AX for FXE and than on to SRQ from there. We had a paitent on board at the time and number one flamed out from what I could only induce was water ingestion. A swift turn ad descent to relight and off we went to FXE.
For fun during a tropical storm last year we did short feild right into the wind at SRQ. It was taking about 200 feet with two notches of flaps to get off the runway into the wind. That was pretty fun and worth the money spent for the 100 LL which is by far not cheap at the FBO's in Sarasota.
As a passenger though the worst ever for me was enrout ABQ to TPA on a WN 737 around July one summer. We were getting rolled about 20 degrees either way by the stuff we were in. After landing the crew told us they would not have departed ABQ had they known the line was going to close up like it did. Talk about serious core punchers.