Hunan this winter frequent snow reasons come out!Changsha sunny “duty” time is……

2022-07-04 0 By

This winter is not normal (not just cold) but cold. It has snowed more often than usual.Rub small hands, such as the sun △ snow covered hunan earth, auspicious snow trillion harvest.With frequent rain and snow, this winter is cold and wet throughout the Spring Festival, which should be felt deeply by people in Changsha.”Sometimes THE Spring Festival can also wear single clothes, I feel this year’s Spring Festival is particularly cold, the room can not stop heating air conditioning!”Citizen Li Yongyang said, without heating air conditioning, the room is like an ice cave.The reporter searched materials and found that in the Spring Festival of 2021, Changsha was not affected by low temperature cold wave weather, and the highest temperature reached 20℃ on the fourth day of the New Year.In the Spring Festival of 2022, changsha only had 2 days with the highest temperature over 10℃, while the rest of the days were hovering at 5℃, and the lowest temperature was as low as 0℃.Such a contrast, very consistent with the farming proverb “before the beginning of spring after warm, after the beginning of spring in February cold” situation.”Throughout the year, the coldest period in Changsha is concentrated in the middle and late January, and the beginning of spring means that Changsha has not passed the coldest period yet.”Chen Ting, deputy director of changsha Meteorological Station, explained that in previous years, Changsha also had low temperature rain and snow in February.”Affected by frequent cold air, the temperature in Hunan has been on the low side since January 23.”Xie Yijun, chief expert of climate prediction of Hunan Climate Center, said that according to the monitoring of Hunan Climate Center, the average temperature in Hunan province from January 23 to February 7 was 3.6℃, 2.5℃ lower than the same period of the year.During the Spring Festival holiday, the temperature in the province was low and the characteristics of wet and cold were obvious. During this period, there were two rounds of low-temperature rain, snow and freezing process, from the early morning of January 31 to the day of February 3 respectively. From 20 o ‘clock on February 6 to now, there were a wide range of sleet or snow and snowstorm.One of the second process intensity is stronger, including Changsha urban area, Ningxiang, Nanyue and other provinces of 19 counties and urban areas appear snow, as of 8 o ‘clock on February 7, the province’s 24 counties and urban areas snow more than 5 cm, Taojiang, Linxiang, Miluo more than 10 cm, Taojiang snow depth of 14 cm.In the late Spring Festival, rain and snow mainly appear in southern China.Heavy snowfall hit Huaihua, Yiyang and Yueyang in Hunan, and freezing rain hit Guizhou and Hunan, according to the National Meteorological Center.Snow covered weather stations and busy workers.Why is there so much rain and snow in Hunan this winter?What causes frequent rain and snow in Hunan?Xie said the first is due to the stable blocking situation in the middle and high latitudes of Eurasia, which is conducive to the slow infiltration and penetration of cold air southward.Water vapor, another key ingredient in snowfall, is also in abundant supply.”The southern branch low pressure trough at the southern edge of the Qinghai-Tibet Plateau is extremely active, conveying abundant water vapor from the Bay of Bengal to China, thus establishing a stable precipitation situation where strong warm and wet air flow and cold air continuously confront each other over the whole southern region, and Hunan is just under its influence.”Xie yijun said.”In addition to the direct factors mentioned above, there are indirect reasons for the snowfall, as well as the influence of the current La Nina.”Xie yijun said that in winter, when la Nina usually affects China, cold air activities are more frequent and more intense, and water vapor transport in south China is weak. Specifically, there is less precipitation in the south of central Hunan.However, since this year, the average precipitation of Hunan province is 164.1 mm, more than 1 times of the usual period, the whole province is more precipitation, among which jiangyong, Lianyuan, Taojiang and other 16 counties and cities accumulated precipitation since 1961 history of the same period the largest.”This is clearly inconsistent with the effect of La Nina and suggests that there are complex factors influencing winter weather.”Snow is also easy to bring freezing disaster to the south.Fortunately, the intensity of cold air this year is not too strong, and the inversion layer in the upper air is not obvious, so there is no obvious catastrophic freezing weather, and many people feel that “snow is falling, as if it is not falling”.How long will changsha’s wet and cold mode last?According to the municipal meteorological station monitoring, changsha on the night of 8, sleet turned to heavy snow, snow amount of 3 mm to 7 mm, snow depth of 1 cm to 4 cm, temperature 0℃ to 2℃, mountain -4℃ to -1℃.In the daytime of February 9, the snowfall area in Hunan was significantly reduced. In northern Hunan, sleet or light snow turned to cloudy day, and scattered light snow turned to light rain in Changsha.According to the forecast of hunan meteorological Station, there will be a precipitation weather process from the evening of the 9th to the 13th, and there will be sleet or pure snow in the high altitude areas of northwest Hunan. On the 12th, the range of rain phase in west Hunan will be expanded, mainly sleet.From 12th to 13th, affected by the cold air, the temperature will drop, and the weather of cooling and snowfall will continue.For people in Changsha, during the day from October 10 to 13, there will still be continuous rainy weather in Changsha, with sleet or freezing in mountainous areas.The temperature is still low, about 1℃ to 4℃, the wet and cold days will be boiled for a few more days.Warmer days are on the way, though.Changsha weather in the coming week: 10 days, cloudy with light rain, north wind 2-3, 2-5 ℃;11, cloudy day with light rain, north wind force 3, 3 ~ 5℃;12, moderate rain, local heavy rain, north wind force 3, 3 ~ 5℃;13, light rain to cloudy, north wind 3-4, 2 ~ 4℃;14th to 16th, cloudy to sunny, early morning fog, north force 2, 2 ~ 13℃.Meteorological authorities warned that during the Spring Festival travel rush, it is still necessary to focus on preventing the adverse impact of icy roads, frozen mountain areas and low visibility on the transportation, energy supply, urban operation and facility agriculture.