Xinhua Shanghai, August 6 (Reporter Li Rong) Typhoon “Sura”, “David” Powell left, this year, the 11th tropical storm “sea anemone” is about to ensue. Within a short period of seven days or so, “Typhoon” have toward the coast of East China, is relatively rare. The meteorological department said, “anemones” moving speed slowly, and even less action, may be longer residence time in the East China region, to enhance preventive measures.
According to expert analysis of the Shanghai Meteorological Bureau, “anemone” with some distinct features: first, the mobile speed changes. Just created, move quickly, about 30 kilometers per hour; moving much slower on the 5th, the moving speed is only 15 kilometers per hour. There was a time in the afternoon of the 6th, do not even move, lack of exercise.
followed by changes in the structure. The beginning of the asymmetric structure, the east side, south side of the cloud band, north side, west side of the weak. The evening of the 6th, the structure is more evenly, north side, west side of the cloud band development is also strengthening.
Once again, the complexity of the environmental conditions. Subtropical high in the weakening stage, the high latitudes, and the trough and ridge mobile, have a significant effect on the subtropical high position. These factors make the “sea anemone” there is uncertainty on the future path and intensity. From the current situation to determine the sea surface temperature, ocean heat content and high-altitude wind shear are conducive to the “sea anemone” continue to strengthen, is expected to wind up to 11-12 when landing, and landing in the “peak period”.
Finally, the impact of the “sea anemone” duration may be longer. Continental high pressure eastward shift of the steering flow from east to southeast, sea anemones, “after landing, may be less active or moving to the north, in a longer residence time of East China, Zhejiang, Jiangsu, Shanghai and other parts of rainfall is estimated to be about three days.
According to related statistics, prior to July this year, less generated and the typhoon made landfall in China. In mid-July, the unusually active tropical cyclones in the Pacific Northwest. Generate five consecutive tropical cyclones and typhoons in the short span of 18 days of July 16 to August 3, three of which landed in China and impact. At present, the “sea anemone” is coming soon. It is understood that the future will also have a new tropical cyclone. Typhoon activity was multiple, frequent bursts of momentum, flood control and anti-typhoon situation is extremely severe.
Shanghai meteorological department said, by the “sea anemone” wind and rain is expected to Shanghai coastal storm surges increase in water 70-140 cm near the Fengxian, Jinshan and Pudong the southern coast of Hangzhou Bay Special attention should be seawall and flood prevention wall of security. “Anemones” landing after the storm impact on the Taihu Lake Basin of longer duration, the east and south of rainfall may be larger, may result in the Taihu Lake water levels, even above the warning level, must guard against.welcome to leave a comment share: the microblogging recommended