Improved forecasts of winter weather extremes over midlatitudes with extra Arctic observations
radiosonde, winter extremes, Arctic, weather forecast, Winter, Ocean-atmosphere interaction, Weather forecasting, Meteorology, Climatology, Uncertainty, Synoptic disturbances, Temperature, Severe winters, Troposphere, Potential vorticity, Troughs, Ice drift, Weather extremes, Risks, Northern Hemisphere, Winter storms, Polar environments, Vorticity, Radiosond...