At 6 a.m. on July 31, the Meteorological Observatory issued an orange warning for heavy rain and a yellow warning for severe convective weather. The warning signal clearly states that from 8 a.m. on July 31 to 8 a.m. on August 1, the northern region will experience a round of heavy rainfall. According to the meteorological data, this round of rain will cover a number of important areas, and the climatic characteristics and weather changes in each place are described in detail.
This round of heavy rainfall mainly affects the following areas:
1. Central and eastern Heilongjiang: Heavy to heavy rain is expected, with the possibility of heavy rain in the southern region, with rainfall intensity of 100 to 180 mm per hour. Rainfall in the area is accompanied by strong convective weather such as thunderstorms and strong winds, so you should pay special attention to weather changes.
2. Central and western Jilin: The rainfall is similar to that in the central and eastern parts of Heilongjiang, and heavy rainfall may occur in some areas. Precipitation will reach 20 to 50 mm per hour, with some areas even exceeding 80 mm.
3. Central Liaoning: Heavy to heavy rain will occur in the region, and heavy rain may occur locally. The wind is strong, and the rainfall is close to that of southern Heilongjiang and northern Jilin.
4. Southern Yunnan and southern Guangxi: These two regions are also expected to be affected by heavy rainfall, with slightly lower rainfall intensity compared to other northern regions, but it is still necessary to be vigilant against sudden heavy precipitation and strong convective weather.
Severe Convective Weather Alerts
The Yellow Warning for Severe Convective Weather also states that the following areas will experience thunderstorms, high winds or hail:
1. Northeast China: including southern Heilongjiang, central Jilin, northern Liaoning and other places, the wind will reach more than 10, and the wind may even exceed 11 in some areas.
2. Eastern Inner Mongolia, Northeast North China, Northeast Huanghuai and Eastern Northwest China: These areas will experience thunderstorms above level 8 with strong winds or hail, and wind speed and rainfall intensity will be greater.
3. The eastern part of Southwest China, the western part of the Yangtze River, and South China: These areas will have short-term heavy precipitation with hourly rainfall greater than 20 mm, and the rainfall in some areas will exceed 50 mm, and the maximum rainfall will reach more than 80 mm.
From 29 to 30 July, rains in the north have covered the following areas:
Central and southern Shaanxi: Heavy to heavy rain is frequent, and heavy rains occur in some areas, and precipitation has increased significantly. The rainfall lasted for a long time and had a significant impact on local traffic and life.
Western Henan: Rainfall was also intense, with short-term heavy precipitation occurring in some areas. Although the overall rainfall is larger, the impact is less than that of other regions.
Shanxi: The rainfall range includes the central and southern regions, and the intensity of precipitation reaches between heavy rain and heavy rain, and local heavy rainstorms occur frequently in some places.
South-central and northeastern Hebei: Heavy rainfall, with extremely heavy rainfall in some areas, affecting local agriculture and infrastructure.
Tianjin: The rainfall intensity is relatively high, and the precipitation in some areas is significant, so special attention should be paid to weather changes.
Analysis of the causes of rainfall
The heavy rainfall was mainly caused by the following meteorological factors:
- Westerly trough eastward: The eastward movement of the westerly trough interacts with the subtropical high, resulting in a large amount of water vapor being transported to North China and Northeast China.
- Subtropical High: A strong southwesterly airflow at the edge of the Subtropical High transports water vapour to the rainfall area, resulting in a large increase in rainfall.
Rainfall vs. history
Compared with the same period last year, the precipitation in major areas such as southern Shaanxi, Henan, Shandong, Liaoning, central and eastern Jilin and Hunan was significantly higher. Despite this, the overall precipitation was not abnormally high. This type of rainfall pattern is common as July is the main flood season, when rainfall is concentrated and typhoon activity is increasing.
Future weather outlook
No typhoons are expected to have a noticeable impact on the mainland in the coming days, but the meteorological department will continue to monitor possible weather changes. Please keep an eye on the latest weather forecast so that you can prepare accordingly.
summary
The northern region is currently experiencing a round of heavy rainfall, covering a wide range of areas, including Heilongjiang, Jilin, Liaoning, Yunnan, Guangxi and other places. This weather pattern reflects typical summer precipitation characteristics, but can also bring extreme weather conditions due to the influence of severe convective weather. You should pay close attention to the latest weather information and make reasonable travel plans to ensure your own safety.
Reminder: Heavy rainfall often brings sudden changes, so you should stay vigilant and check the latest forecast of the Meteorological Observatory regularly so that you can adjust your life and travel arrangements in time. Weather changes can be like a pot of porridge, seemingly calm, but the reality can change rapidly.
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