Airbus A320 (N416UA)

N416UA departing runway 2L on an overcast morning. The wind was calm and the usual calm wind runway is 20R for jet traffic but SNA has a very short runway and sometimes flights are too heavy to takeoff on 20R but going the other direction on the same runway (2L) there is enough of an up-slope which creates lift faster and they are able to get up in time,even going this direction this one still took up most of the runway.