The forecast for the weekend seems to indicate that temperature will rise while winds increase, to perhaps -5 to -12C and ~10m/s. Clouds are expected to move in from the sea to the west, and the chance of snow rises through the weekend.
CO is expected to drop slightly to ~40mg/m2 over the next days, before rising again to peak around 200mg/m2 on the evening of 2 April. After this the same air masses remain in the area, but no new plumes seem to be approaching. NO2 is forecast to hold constant around 40mg/m2, while SO4 remains below 5mg/m2.