During the Mid-Autumn National Day holiday, cold air activities are frequent, with cloudy and cloudy weather during the day from 28th to 29th, light rain affected by weak cold air from 29th to 1st October, moderate to heavy rain in the northwest of Hunan, and a slight drop in temperature. From 2nd to 4th, it was cloudy and cloudy during the day, with scattered showers, with obvious temperature recovery. From 4th to 6th, it was light rain affected by strong cold air, heavy rain in the north of Hunan, and local gust of 7 in the north wind. During holidays, it is necessary to strengthen the prevention of the adverse effects of rain, strong winds and other weather on traffic and outdoor activities.
First, the weather forecast in the province
The Mid-Autumn National Day holiday is dominated by cloudy days with staged cooling and rainy weather. From the evening of September 29th to October 1st, affected by the infiltration of weak cold air southward, there was light rain on cloudy days in the whole province, and the temperature dropped slightly. On the evening of the 29th, there was moderate to heavy rain in the northwest of Hunan (Attached Figure 1). From the evening of 4th to 6th, due to the influence of strong cold air, there was a heavy rain in the northwest of Hunan (attached figure 2), and the local gust of the north wind was level 4 ~ 5, and the maximum temperature could gradually drop to about 20℃ (attached figure 3). Specific forecast:
On the 28 th, there was light rain on cloudy days in southern Hunan, and cloudy weather was dominant in other areas; The north wind is 2 ~ 3; The highest temperature is 27 ~ 29℃ in northwest Hunan and 30 ~ 32℃ in other areas.
On the 29 th (Mid-Autumn Festival), there was light rain on cloudy days in southern Hunan, and it turned cloudy to light rain in other areas, including moderate to heavy rain in northwestern Hunan; The north wind increased from 2 to 3 to 3 to 4; The highest temperature is 27 ~ 29℃ in the north of Hunan and 30 ~ 32℃ in other areas.
On the 30 th, there was light rain in most parts of the province on cloudy days; The north wind is 2 ~ 3; The highest temperature is 23 ~ 25℃ in northwest Hunan and 28 ~ 30℃ in other areas.
On October 1 (National Day), there was light rain in most parts of the province on cloudy days; The north wind is 2 ~ 3; The highest temperature is 21 ~ 23℃ in northwest Hunan and 24 ~ 26℃ in other areas.
From 2 nd to 3 rd, the province is dominated by cloudy and cloudy weather with scattered showers; The north wind is 2 ~ 3; The highest temperature is 27 ~ 29℃ in the north and west of Hunan, and 30 ~ 32℃ in other areas.
On the 4 th, the northwest of Hunan turned cloudy to moderate rain, with heavy rain in the local area and cloudy to light rain in other areas; The north wind is increased from 2 to 3 to 4 to 5, and the local gust is 7; The highest temperature is 24 ~ 26℃ in northwest Hunan, 30 ~ 32℃ in southern Hunan and 27 ~ 29℃ in other areas.
On the 5th, there was moderate rain on cloudy days in northern Hunan, with heavy rains in Xiangxi, Zhangjiajie, northwestern Changde, southern Yueyang and eastern Changsha, and light rain on cloudy days in other areas. The north wind is 4 ~ 5, and the local gust is 7; The highest temperature is 20 ~ 22℃ in north Hunan, 29 ~ 31℃ in south Hunan and 23 ~ 25℃ in other areas.
On the 6 th, the rain in northern Hunan turned cloudy, and there was light rain on cloudy days in other areas; The north wind is 4 ~ 5, and the local gust is 7; The highest temperature is 17 ~ 19℃ in the north of Hunan and 21 ~ 23℃ in other areas.
Second, the national weather forecast
During the Mid-Autumn National Day holiday, it was rainy in Sichuan Basin, Jianghan, Huanghuai, eastern Qinghai and eastern Gansu. The rainy days in eastern Sichuan Basin and southwestern Shaanxi can last for 4 ~ 7 days. There are moderate to heavy rains in northeastern Sichuan, northern Chongqing, western Hubei, western Henan and northern Guizhou, with local heavy rains and strong convective weather such as short-term heavy precipitation. The accumulated precipitation in most parts of the country is 30 ~ 60mm, and it is 100 ~ 200mm in northeastern Sichuan, southwestern Shaanxi and northern Chongqing, with the local area exceeding 250mm.
Iii. Impact analysis and suggestions
1. Strengthen the prevention of the impact of rainy weather on traffic safety. Staged rainy weather will make the road surface wet and slippery, and rainy and foggy low visibility weather will cause driving sight distance deviation, which poses great risks to transportation and holiday travel safety; It is necessary to strengthen traffic guidance during the peak period of holiday travel to avoid serious congestion.
2. Pay attention to the disaster risk of strong local rainfall. There are rainy days in the early stage of the holiday, and the soil is easy to be too wet and soft. From the evening of the 4th to the 5th, attention should be paid to prevent secondary disasters such as geological disasters and urban waterlogging caused by heavy rainfall in Xiangxi, Zhangjiajie, northwest Changde, south Yueyang and eastern Changsha.
3. Pay attention to prevent the influence of windy weather. From the evening of the 4th to the 5th, there may be 4 ~ 5 winds in rivers, lakes and high-altitude areas, with local gusts above 7. It is necessary to strengthen the investigation of hidden dangers in water transportation, high-altitude scenic spots and outdoor recreation facilities, and strengthen the safety protection work.
4. Pay attention to prevent the impact of continuous rainy weather on agriculture. Since the 20th, there has been a persistent "cold dew wind" in some areas of northern Hunan and central Hunan. The persistent low temperature will affect the heading, pollination and filling of late rice, which may increase the empty shell rate. Attention should be paid to strengthening deep water irrigation and spraying foliar fertilizer to reduce the risk of yield reduction.
5. Pay attention to prevent strong cooling effects. From 30th to 1st October, the temperature in the province dropped slightly; After 4 days, the highest temperature in the province will drop to 20℃ and below. Attention should be paid to prevent the adverse effects of strong cooling on public travel in high altitude areas.
Attached Figure 1 Cumulative Rainfall Forecast of Hunan Province from 20: 00 on September 29th to 08: 00 on October 2nd.
Attached Figure 2 Cumulative Rainfall Forecast Chart of Hunan Province from 20: 00 on October 4th to 08: 00 on October 7th.
Figure 3 Maximum temperature drop and gale forecast in the process from 20: 00 on October 4th to 08: 00 on October 7th in Hunan Province.
Figure 4 National Precipitation Forecast from September 29th to October 6th.
(Source Hu Jie, editor of Hunan Meteorological Bureau)
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Original title: "The highest temperature drops to 20 C! Local level 7 gale! The latest weather in Hunan during Mid-Autumn National Day → "
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