How many hours does a typhoon usually stay?

Typhoons usually end within one day after landing, up to ten days or half a month (15 days).

But mainly depends on the conditions. If the typhoon is blocked by the "weak cold air in summer" in mountainous areas, it will cause the typhoon to stay for at least one week. Under normal circumstances, the typhoon will weaken after landing, and the typhoon is a relatively stable and continuous air vortex.

Typhoon pressure is low, and there is updraft near the center. When the typhoon is on the sea, the supplementary airflow rotating around it carries a lot of water vapor, which rises to the sky with the updraft near the center to condense my rain. When water vapor condenses, it releases a lot of heat, which is the power source of typhoon.

Typhoons are all developed from the pre-existing tropical depression disturbance. According to China's statistics, the tropical cyclones in the western Pacific-South China Sea region come from four initial disturbances in intertropical convergence zone, accounting for 80% ~ 85%; East wind wave, accounting for about10%; The cut-off low pressure in the long wave trough at middle and high latitudes, or the cold vortex at high altitude, accounts for about 5%; Baroclinic disturbance accounts for less than 5%.

Matters needing attention in typhoon days

1, be alert to typhoon trends, pay attention to listening to and watching media reports, or learn about the latest situation of typhoons through meteorological consultation telephones and meteorological websites.

2. Minimize going out. If you want to go out, try not to ride a bike. Don't go to rivers and lakes, and don't participate in water and high-altitude amusement projects.

3. Clean the drainage pipes to keep the drainage unblocked.

4. Don't get close to or stay under billboards, trees, temporary structures and other objects that are easily blown by the wind.

5. Typhoon weather will cause water accumulation on the road surface and ground sliding, which will affect driving or riding and cause accidents. Therefore, drivers must slow down when driving, and friends who ride bicycles had better choose to walk or take the bus in bad weather.

6. When the typhoon comes, please close the doors and windows at home and reinforce the structures that are easy to be blown by the wind, such as hoardings, scaffolding, billboards, etc. Outdoor items susceptible to strong winds, such as flower pots on the balcony of a home, should be properly placed and fixed.