Core Points - Liaoning province is experiencing the coldest daytime temperatures since the beginning of autumn, with some areas seeing maximum temperatures drop to single digits [1] - The province officially entered meteorological winter on October 17, three days earlier than the average date of October 20 [1] Summary by Sections Weather Conditions - A strong cold air mass began affecting Liaoning on the night of October 16, leading to significant temperature drops [1] - From October 17 to 18, the eastern and northwestern regions of Liaoning are expected to see minimum temperatures decrease by 8 to 10 degrees Celsius, with localized drops reaching 10 to 14 degrees Celsius [1][2] - Most areas will experience temperature declines of 4 to 8 degrees Celsius [1] Temperature Forecast - On October 17, the majority of Liaoning will be under cloudy and rainy conditions, with maximum temperatures in cities like Shenyang, Tieling, and Fuxin falling to between 7 and 9 degrees Celsius [1] - The lowest temperatures of this cold wave are anticipated on the morning of October 19 to 20, with mountainous areas reaching -8 to -5 degrees Celsius, while other regions will generally be between -4 and 0 degrees Celsius [2] Weather Alerts - The Liaoning Meteorological Observatory issued blue alerts for cold waves and frost, indicating the potential for ground temperatures to fall below 0 degrees Celsius, leading to frost [2] - Strong winds are expected, with land-based north winds reaching 4 to 6 levels, and gusts up to 7 to 8 levels [2]

Core Viewpoint - A strong cold air mass is expected to significantly lower temperatures across China, with Beijing likely to experience its earliest winter onset in years, potentially starting on October 18, 2023 [4][8]. Summary by Sections Weather Impact - The cold air mass will affect most regions of China, bringing the lowest temperatures since the second half of 2023, with Beijing's temperatures expected to drop to single digits starting from October 17 [2][6]. - Continuous average temperatures below 10°C are forecasted for Beijing from October 18 to 24, indicating a high probability of winter onset [4][8]. Temperature Predictions - The average temperature in northern regions, including Beijing, is expected to remain below 10°C for at least five consecutive days starting October 18, which meets the criteria for winter [6][8]. - Initial frost conditions are anticipated in northern areas, including parts of Liaoning, during this period [6][8]. Weather Warnings - The Beijing Meteorological Station has issued blue alerts for cold waves and strong winds, predicting a temperature drop of around 8°C from October 16 to 18 [8]. - Specific regions in Beijing are under frost warnings, indicating potential agricultural impacts due to low temperatures [8]. Health Advisory - The Beijing Center for Disease Control advises residents to take precautions against the cold, including wearing appropriate clothing and maintaining hygiene to prevent respiratory illnesses during the flu season [9].