The lost aircraft had landed at another HEMS operation to unload the patient they had been dispatched to carry. I wonder if there was any contact between the two crews. If so, I would bet there would have been some discussion about weather if only to invite the visiting pilot to the office for a weather check and cup of coffee.
An interesting question.....what if you landed to drop off a patient and while shut down you discovered the host operation had cancelled flight operations based upon the existing weather? Would you takeoff or beg a bed for the night until weather improved?
Just what-if'ing here....not making any suggestions regarding the accident in question.