nout_index = np.where( ((trajs["Q"][:,6]-trajs["Q"][:,0]) > 0.2) & #Only the parcels that "rain" out over 6h timeperiod.
                              (np.max(trajs["RH"][:,0:6], axis = 1 ) > 80 ) & #Only the parcels that at some point are quite humid the last 6 hours, opps, this is 6*6 hours for other events than Walpurga.
                              (np.max(trajs["p"], axis=1 ) > 700 ))