After the Beginning of Winter in Heilongjiang: The temperature drop is the largest in the year and rain and snow appear alternately

China News Service, Harbin, November 7 (Wang Nina, Wang Lei) The beginning of winter is the beginning of winter in the 24 solar terms. Every time the cold air comes, it brings strong winds, cooling, rain and snow. The temperature continues to drop amid fluctuations, and the chill gradually increases.

November 7 is the first day of winter, and it is sunny and sometimes cloudy in Heilongjiang Province. The maximum temperature is -12 to -8℃ in the Greater Khingan Mountains, Heihe, Yichun, northern Qiqihar, and northern Suihua, and -8 to -4℃ in most other areas.

Judging from the average temperature variation data of the 24 solar terms in Heilongjiang Province, the period after the beginning of winter is the period with the largest cooling rate in the whole year, with a cooling rate of 6.36°C, ranking first among the 24 solar terms. The three solar terms of frost, the beginning of winter, and the subsequent light snow constitute the most intensive period of cooling throughout the year. During this period, the temperature decline in the province accelerated significantly, with waves of cold air rising again and again. The cooling process came quickly, with a large amplitude and strong sustainability.

At the same time, Beginning of Winter is still in the transition period from rain to snow, which is the most distinctive precipitation feature in Heilongjiang during this season. The precipitation phase in the northern region begins to be dominated by snow, while in the southern region it gradually transitions from rain to snow. Rain, sleet, wet snow, ice particles and even freezing rain often appear alternately, especially in the central and southern regions.

Judging from the number of days when sleet and snow occurred in major cities in the past ten years, the most concentrated days were frost, Beginning of Winter, Vernal Equinox and Tomb Sweeping Day, with the peak in Jiamusi occurring during the Beginning of Winter. On the eve of the beginning of winter this year, Hegang, Jiamusi, Shuangyashan, Jixi and other places experienced the process of light rain turning to sleet and then wet snow. The risk of slippery roads and icy roads increased sharply. The early rainwater turned into dark ice after cooling down, which is far more hidden than pure snow.

At the beginning of winter, the temperature plummets, and rain and snow appear alternately. During the beginning of winter, Heilongjiang Province experienced two rainy and snowy weather events, with strong winds in the early stage. From the 7th to the 8th, there were winds of magnitude 5 to 6 in the central and eastern parts, with gusts of magnitudes 7 to 9; from the 9th to the 12th, there were snow showers in the northern region from west to east; from the 14th to the 15th, there was another rain and snow event in the central and southern parts.

The Meteorological Department reminds that ice, snow on roads, and ice on power lines will still have a great impact on transportation, communications, urban operations, and agriculture. The public needs to pay attention to nowcast warnings, drive slowly and keep a safe distance in rainy and snowy weather. (over)