I was booked on the afternoon KLM flight so know what happened.
MME flight was cancelled at around 12:00 CET (I asked to be rebooked to NCL but was first offered the evening MME flight - I am platinum so would have been one of the first put on a combined afternoon MME/LBA flight) at this time the LBA flights were still scheduled.
The MME was cancelled due to high winds at AMS so only one runway was in operation (so I guess the smaller routes were cut).
The LBA flight was diverted at around 15:00 due to high winds in Leeds. I arrived at AMS at about 15:30 and got put back on the diverted LBA flight so ended up where I wanted to be.
Plane was an E190 and was not full, suggesting that many of the MME pax were put on other flights.