China News Service, Nanchang, April 2 (Yuan Rujing) Thunderstorms, strong winds, heavy rain and hail... In recent days, strong convective weather has occurred frequently in Jiangxi Province, with wide impact, large cumulative rainfall, long duration, and high risk of disaster. It is expected that in the next week, Jiangxi will still experience strong convective weather such as short-term heavy rainfall accompanied by strong thunder and lightning, thunderstorms, strong winds, and localized hail.
What is severe convective weather?
Wang Xuan, chief forecaster of the Jiangxi Provincial Meteorological Observatory, said in an interview with a reporter from China News Service on the 2nd that severe convective weather mainly refers to local strong storms that produce hail, tornadoes, thunderstorm winds, and short-term heavy precipitation. They are sudden and destructive. It is powerful and is one of the major disastrous weather conditions in Jiangxi. Strong convective weather in Jiangxi Province mainly occurs from March to September every year.
April 2, a street in Nanchang, Jiangxi. Photo by Yuan Rujing
Jiangxi has entered the strong convection season since March 23, and has so far experienced four severe convective weather processes. From March 23 to 25, 27, and the evening of the 30th to 31st, strong convective weather such as thunderstorms and thunderstorm gales occurred in Jiangxi, and hail also occurred in some areas.
Obvious thunderstorms occurred again on April 1. Heavy rainstorms occurred at 82 measuring stations in 14 counties (cities and districts) in Jiangxi Province. 126 measuring stations in 49 counties (cities and districts) experienced gusts of level 8 and above, and 10 15 measuring stations in counties (cities, districts) experienced wind gusts of magnitude 10-11, and hail occurred in some towns and villages in Chongyi, Shangyou and other places.
Why are strong convective weather so frequent in Jiangxi?
"The occurrence of strong convective weather requires a certain amount of water vapor and unstable conditions in the atmosphere, and rising motion is also needed to trigger these unstable conditions." Wang Xuan introduced that from March to September in Jiangxi, the temperature gradually increased, and the water vapor conditions It's also better. An environment of high temperature and high humidity is conducive to the formation of unstable conditions, which makes convective weather more likely to occur. "Especially when cold and warm air meet violently, the probability of strong convective weather will be greater."
According to the forecast of the Jiangxi Provincial Meteorological Observatory, thunderstorms will still be active in most areas of Jiangxi from April 2 to 3. The Jiangxi Provincial Meteorological Observatory successively changed the orange warning signal for strong winds, orange warning signals for hail and orange warning signals for thunder and lightning on the afternoon of the 2nd.
How long will Jiangxi's strong convective weather last?
The reporter learned that starting from April 3, heavy rainfall and strong convection in Jiangxi Province gradually moved southward. There were moderate to heavy rains or thunderstorms on cloudy days in southern northern Jiangxi, central Jiangxi and southern Jiangxi, and heavy rains occurred in some areas. When thunderstorms come, some areas are accompanied by strong thunder and lightning, short-term heavy precipitation, thunderstorm winds of about level 10 and hail. From the 4th to the 6th, there will be moderate to heavy rain or thunderstorms on cloudy days in central and southern Jiangxi and southern Jiangxi, and heavy rain in some areas.
By the 7th, the rain in northern Jiangxi will gradually decrease, and the southern part of Jiangxi will be cloudy with moderate to heavy rain or thunderstorms. There will be heavy rain in some areas, but the convective weather has weakened. The northern part of southern Jiangxi will be cloudy with showers or thundershowers. It will be cloudy in northern and central Jiangxi. Cloudy at times, with showers or thundershowers in some areas.
How to prevent severe convective weather?
The Meteorological Department stated that severe convective weather has the characteristics of sudden, local, and extreme nature, and attention should be paid to strengthening the inspection and reinforcement of dilapidated houses, construction sites, outdoor billboards, temporary structures and other facilities, as well as industrial parks and Lightning protection safety management for enterprises that produce and store flammable and explosive items such as petroleum, chemicals, fireworks and firecrackers.
In view of the heavy cumulative rainfall and long-lasting rainfall in Jiangxi in the future, the risk of small and medium-sized river floods, flash floods, and geological disasters will increase in various places. It is necessary to strengthen monitoring and inspections of key areas such as Shantang Reservoir and geological disaster-prone areas to prepare for prevention. Work.
The Tomb Sweeping Day holiday is approaching, and all regions need to focus on strengthening safety risk management of local heavy precipitation and convective weather on tourism, transportation and other aspects. People should avoid going out during thunderstorms and thunderstorms, and stay away from tall objects and metal structures; when sheltering indoors, avoid approaching doors and windows; and avoid entering dangerous water accumulation places such as culverts and underground passages during heavy rainfall.
In agriculture, attention should be paid to early reinforcement and timely repair. Rapeseed, vegetable and other growing areas have a high risk of waterlogging and need to strengthen drainage. (over)