Core Viewpoint - The weather forecast indicates a significant drop in temperature and strong winds as the Spring Festival approaches, with specific warnings for cold weather and wind chill effects [1][10][24]. Weather Conditions - On February 15, the weather will be mainly sunny with a noticeable drop in temperature, ranging from 5 to 2°C, accompanied by a north wind of 3 levels, with gusts reaching 6 to 7 levels [1][3][5]. - The evening of February 15 will see a decrease in wind strength, with temperatures feeling cold, and precautions against colds are advised [3][4]. - On February 16 (New Year's Eve), the weather will be sunny with a temperature range of 7°C in plains and 5 to 8°C in mountainous areas, with a north to south wind of 2 to 3 levels [6][10]. Temperature Trends - From February 17 (New Year's Day) to February 20, daytime temperatures are expected to rise to between 11°C and 14°C, making it suitable for outdoor activities [11]. - A cold air mass will cause a temperature drop after this period, with some regions experiencing a decrease of 6 to 10°C, and localized areas in Jiangnan potentially seeing drops of over 12°C [24]. Safety and Health Advisories - Public advisories include precautions against strong winds and cold weather, particularly for outdoor activities during the Spring Festival [13][14]. - The dry weather conditions necessitate hydration and caution regarding fire and electrical safety [15].

Summary of Key Points Core Viewpoint - The weather forecast for the Spring Festival period (February 15-23) indicates an average temperature of -5.0℃ (higher than normal) and a precipitation of 8.0 mm (above normal) [2] Weather Events - On February 17, light snow or sleet is expected in the northern region - From February 21 to 23, significant rain and snow, strong winds, and temperature drops will occur across the province from west to east - Temperature fluctuations are noted, with a low on February 15, a rise on February 16, a slight drop on February 17, a significant rise on February 18, and a sharp decline starting the night of February 21 [3] Recommendations and Safety Measures - Ice and snow tourism and travel: The early part of the festival is suitable for skiing and ice viewing, while from February 21 to 23, rain and snow with temperature drops suggest careful itinerary planning and outdoor activity precautions [4] - Traffic safety management: The transition from daytime thawing to nighttime freezing and the subsequent slippery conditions necessitate increased monitoring of key road sections and caution for drivers [4] - Urban and rural fire safety: Dry air and high fire risk levels, combined with increased use of fire for traditional activities, require precautions to prevent fire hazards [4] - Public health protection: Stable weather conditions necessitate proper ventilation during coal heating to prevent carbon monoxide poisoning, and caution is advised regarding melting snow and falling ice [4] Energy Supply Management - The forecast indicates weak wind power generation during most periods, necessitating advance preparations for coal, electricity, and oil supply to ensure energy availability during the holiday [5] Agricultural Management - With lower temperatures in the early morning and evening, facilities for vegetables and flowers need temperature control measures to prevent frost damage [5]

Summary of Key Points Core Viewpoint - The weather forecast for Shanghai during the Spring Festival indicates a generally warm period with rain at the beginning and end of the holiday, with the highest temperature reaching 19°C on the fourth and fifth day of the festival [1]. Weather Forecast Details - The initial phase of the holiday (February 15-16) will experience strong cold air, with the lowest temperature on New Year's Eve at 9°C accompanied by light rain [1]. - Following the initial cold spell, temperatures will gradually rise, peaking at 19°C on February 20 and 21 [1]. - The weather will be predominantly cloudy during the holiday, with slight rain interruptions on the sixth and seventh days [1]. Daily Temperature Breakdown - February 15: Light rain transitioning to showers, temperatures between 9°C and 13°C [1]. - February 16: Light rain transitioning to cloudy, temperatures between 6°C and 9°C [1]. - February 17: Cloudy, temperatures between 3°C and 10°C [1]. - February 18: Cloudy to sunny, temperatures between 4°C and 12°C [1]. - February 19: Cloudy to sunny, temperatures between 6°C and 16°C [1]. - February 20: Sunny to partly cloudy, temperatures between 8°C and 19°C [1]. - February 21: Partly cloudy, temperatures between 8°C and 19°C [1]. - February 22: Partly cloudy to overcast, temperatures between 9°C and 16°C [1]. - February 23: Cloudy transitioning to light rain, temperatures between 7°C and 15°C [1].