Why is typhoon track different?
TyphoonSays·防御问答 · Typhoon knowledge · 更新 at 2026-07-18
How Supercomputers Count Typhoon Track
Typhoon trackForecast is not based on speculation, but rather on the complex numerical weather forecast model.Simply put, the meteorological department divides the global atmosphere into countless grids, collecting vast amounts of data from satellites, radar, aerial balloon and ocean floats, including air pressure, Temperature, humidity and wind speed, etc. These initial data are entered into a supercomputer and operated in combination with fluid mechanics and thermodynamics equations.
由 at Typhoon 是一个巨大的天气系统, 其Moving受到副热带高压, W风带, 季风槽等多种环境气流的引导. 计算机通过模拟这些大尺度环境场的变化, 推算出Typhoon 未来可能Moving的轨迹. 这就好比在湍急的河流中预测一片树叶的走 toward , 我们需要知道水流的速度, direction以及周围是否有漩涡. 随着观测技术的进步和数据同化能力的提升, 现代typhoon trackForecast的准确率已大幅提高, 但本质上它仍然是一种概率性的科学预测.
Why There Are Different Country Forecasts
Many residents will find that the typhoon track map issued by the China Meteorological Administration, JMA (Japan), USA Joint Typhoon Warning Center tends to not completely overlap, which is mainly due to the following key factors:
- Initial data is different.Observational data sources and densities vary, especially on the vast ocean surface, with more data gaps, and different data filling methods that cause different starting points of calculation.
- Different numerical models.Each country or region has different numerical Forecast models that are independently developed or introduced (such as China's CMA-TYM, Europe's ECMWF, USA's GFS, etc.) which focus on the parameters of physical processes, grid resolution and calculation methods, resulting in deviations in the interpretation of the same environmental field.
- Experience is different.: The output of the numerical pattern is usually “nude data” and Forecast members need to make artificial adjustments in combination with historical experience and local climate characteristics.
Therefore, View forecast the path of multiple authoritative agencies, focusing on their “collective average” trend, is often more stable than relying on one.
The scientific view of forecast uncertainty
It should be clarified that typhoon trackForecast has an inherent uncertainty, and errors will gradually accumulate with the extension of the Forecast time effect: usually the path Forecast within 24h is more accurate, while the 72h or longer Time Forecast more reflects the approximate MovingTrend and the potential impact range.
When Typhoon approaches, the corresponding emergency response will be launched based on wind force, rainfall and other indicators. shut down at specific shutdown, shutdown, shutdown regulations, Standards may vary from place to place, subject to local government publication.Residents should not just look at the exact Position of the Typhoon Center, but should focus on the weather department's storm effect early warning. even if the Typhoon Center does not directly Landfall, its outer spiral rain belt and strong wind circle can still cause serious disasters.
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This article is typhoonsay's original copy content, and the local policy standards are based on the local government's latest release.