Make scatter trace extend beyond the plot area

Hi,

I would like to allow a trace of a scatter plot to extend in y beyond the plot area, i.e. the recatangle limited by the max range values. The intention is to draw attention to an event in a time series which has much higher y-values than the mean. The traces are plotted in several rows of subplots and they should be allowed to extend as far as the whole multiplot area. Is that possible somehow?

Regards, Christian