Today's review.
Wet and cold, dry and cold.
This morning, stronger cold air from the north began to affect the city, and the sky cleared. The cooling range of this cold wave weather is not as large as the last time, but because the base temperature is already very low, today belongs to the cold on the cold, and the temperature is 1 throughout the day1~4.2 (Xujiahui Station).
One blue and one yellow" warning is hung high.
Cold wave + low temperature warning ** "online" as standard in cold weather. At 17 o'clock today, the Shanghai Central Meteorological Observatory issued a yellow warning signal for low temperatures;The Blue Warning Signal for Cold Wave is maintained. For real-time warning updates, please click [Read the original article] at the end of the article
Tomorrow's weather. 
The cold wave is superimposed on radiation cooling, and the minimum temperature in the urban area will drop to minus 3 tomorrow morning, with freezing, and minus 6 to minus 4 in the suburbs, with freezing or severe freezing. It's even below zero all day.
Specific forecast: sunny to cloudy, minus 3 to 0, northwest wind 5 gusts 6 7. Air humidity 70% 40%.
Tips: The temperature will be below freezing all day tomorrow, so you must do enough to keep warm
Freezing or severe freezing in the morning, clean up the stagnant water in time, and pay attention to the vehicle to check the antifreeze;
The air becomes drier and the electricity load becomes larger, so pay attention to the safety of fire and electricity at home.
Future weather trends.
Friday entered the "winter solstice" in the 24 solar terms, and the prelude to the "counting nine cold days" was kicked off in trembling!It is expected that the minimum temperature at Xujiahui Station in the central city will be minus 3, and the suburb will be even lowerThe maximum during the day is only 2!
Although the daytime temperature has entered an upward channel since Saturday, it is still below freezing in the morning and evening. The warmer temperature will be more obvious in the middle of next week, and the maximum temperature will say goodbye to single digits. The next 10 days will be generally sunny and cold, and the work of cold protection and warmth is still the top priority.
Tips: The air gradually becomes dry later in the week, so everyone should pay attention to hydration. On the 22nd, it is the winter solstice to sweep, and everyone must pay attention to the safety of the festival.
Meteorological trivia:
According to the current forecast, Xujiahui Station will have a minimum temperature below minus 1 for 5 consecutive days (21 25th). Statistics show that in the past 40 years, there has been no weather with a minimum temperature below minus 1 for five consecutive days at Xujiahui Station in late December. In a similar vein, there were four consecutive days in 1991, 1993 and 1999, and this time the continuous low temperature was really a long standby.