From the NTSB report of the Air Florida crash states: (still relevant, 30 years later!!)
The National Transportation Safety Board determines that the probable cause of this accident was the flight crew’s failure to use engine anti-ice during ground operation and takeoff, their decision to take off with snow/ice on the airfoil surfaces of the aircraft, and the captain’s failure to reject the takeoff during the early stage when his attention was called to anomalous engine instrument readings. Contributing to the accident were the prolonged ground delay between deicing and the receipt of ATC takeoff clearance during which the airplane was exposed to continual precipitation, the known inherent pitchup characteristics of the B-737 aircraft when the leading edge is contaminated with even small amounts of snow or ice, and the limited experience of the flightcrew in winter operations./
So...
their decision to take off with snow/ice on the airfoil surfaces of the aircraft
....and then....
the prolonged ground delay between deicing and the receipt of ATC takeoff clearance during which the airplane was exposed to continual precipitation
The de-icing at the gate was completed 15:10, the aircraft finally took off at 15:59:46 after taxi out and waiting in turn for T/O in snow reported as alternating between "moderate" and "heavy".
@ 15:47, about 12 min before take off the First Officer made the following comment in reference to his (right) wing:
this one’s got about a quarter to half an inch on it all the way
The report then goes on stating:
...the V2 callout occurred at 1600:37 and the sound of the stall warning (stickshaker) began 2 seconds later and continued until impact.
Nothing much to say really.....
I read the report years ago but went back and read it again. I can really recommend to all of you to read it as it highlights a lot of potential issues with operating in winter conditions.