Winter rainstorm in Guizhou

It has been ten days since New Year's Day. With the help of the cold wave on New Year's Day, Guizhou finally ushered in the first snow in winter. This winter, Guizhou always looks very cold, and this winter, the rain in Guizhou always looks a little heavy. The rainstorm in Guizhou is actually influenced by the south branch trough, and the winter rainfall in most parts of Guizhou reaches the extreme value.

Recent weather conditions in Guizhou

How are your friends in Guizhou? It is said that there will be heavy rain in Guizhou this winter. According to the statistics of Guizhou Meteorological Observatory, from 08: 00 on108: 00 on October 8, 2008 to 08: 00 on109, there was a rainstorm at 65: 438+057 station in 22 counties of Guizhou Province, in which the wind force in duyun city was the largest, reaching 96.8 mm. Among them, there were heavy rains in Wangmo, Ceheng, Leishan, Danzhai and Xingyi, and the precipitation above the heavy rain mainly appeared in southwestern Guizhou, southern Anshun, central southern Guizhou and central southeastern Guizhou.

There are really few heavy rains this year. There is basically no such large-scale rainfall in winter in Guizhou.

On October 9th, 65438/kloc-0, the heaviest rainstorm occurred in Guizhou. During the rainfall period from 08: 00 on October 8 to 08: 00 on October 9, 65438/kloc-0, the daily precipitation in 17 counties (cities, districts) in the province exceeded the historical extreme value.

For this rainstorm, the Guizhou Provincial Meteorological Observatory explained that the rainstorm in Guizhou is mostly in summer, followed by spring and rarely in winter.

This rainstorm is mainly affected by the rich water vapor in the south branch trough.

southern branch trough

The south branch trough is also called subtropical westerly trough. There are convergent ascending motion and precipitation areas in front of the trough, and divergent descending airflow behind the trough. It's sunny.

South branch trough is common in winter, which can cause heavy rain, heavy rain, thunderstorm, hail and strong wind. If there is no cold air in the south branch trough, there will generally be local showers or small to moderate rain. When the south branch trough is combined with strong cold air, it can cause cooling, rain and snow weather in the whole low latitude plateau area.

This is the so-called "heavy precipitation". In fact, judging from the magnitude and time of rain, it has not reached the standard of heavy precipitation. In the last January alone, 24 small rainfalls reached the rainstorm level, which is really rare.

The cumulative precipitation in Guiyang is 28.9mm, reaching the level of rainstorm. This heavy rainfall process is rare in winter. It is reported that in recent 10 years, the accumulated precipitation at Guiyang Dongshan Station has never exceeded 20 mm in the 24 hours since 65438+ 10. In addition, the daily precipitation in Guiyang exceeds the total precipitation from 2009 to 20 14 1 month.

65438+10.8, Guiyang experienced the first heavy rainfall this year. There is moderate rain and partial heavy rain in the city. With the cooperation of rain and low temperature, Guiyang in late winter is even more chilly. After that, Guiyang will turn from light rain to cloudy in the next few days.

According to the forecast of Guizhou Meteorological Observatory, from today on, the rainfall in most areas of Guizhou began to decrease, and some areas still have rain to light snow, which may cause secondary disasters. The Guizhou Provincial Emergency Department, the Guizhou Provincial Anti-finger Office, the Provincial Disaster Reduction Office and the Provincial Security Committee Office issued a notice on the 8 th, requiring all localities and departments to attach great importance to it and earnestly do a good job in preventing low-temperature rain, snow and heavy rainfall. We will do our utmost to prevent flash floods that may be induced by local heavy rainfall and transfer people in areas that may be threatened in time. At the same time, all localities should seize the opportunity of precipitation, do a good job in water storage and conservation, and reserve water sources for drought resistance in winter and spring.

The meteorological department reminded that the rain caused the road to be slippery and the traffic was affected to some extent. Please pay attention to the latest weather and road information and pay attention to traffic safety.

1 1 at night, sporadic rain in the west of the province turned cloudy, and light rain in other areas turned cloudy;

1 1 From night to 12 During the day, the western part of the province is cloudy, and the rest areas are cloudy with light rain from night to morning. In the next three days, there will be fog in the central and western parts of our province and Wanshan.