source: Shandong business daily
yesterday, Ji'nan city citizens in Shandong Province before the storm in the storm, Lv Tingchuan / > morning,
morning In the midday, the sky suddenly began to sink, like a summer rainstorm, and at 13:52 the sky had a flash of lightning, like a tear in the sky, then a thunderstorm, and then the sky was flown with goose snow... Yesterday, the weather in Ji'nan, Shandong province was really abnormal, even the weather experts expected, unexpectedly started "thunder snow", and a day of rain, snow, shotgun (Xian) and thunderstorms, to a rare "four face". In addition, the snowfall in Ji'nan reached the blizzard standard yesterday.
[b] this season thunderstorm [/b]
[b] 50 years since only three [/b]
yesterday morning, the sky in Ji'nan was cloudy, and soon the rain came with the wind. At 13:52, just as the reporter was at the meeting, there was a roar of thunder in the gloomy sky outside the window, and thunder and lightning crossed the city. Everyone is curious, why do we start to thunder at this time? Mr. Feng said, "in general, after the alarm, the thunder started."
according to the Ji'nan Meteorological Observatory, it is rare to see thunderstorms at this time. Since 1961, there have been two times in Ji'nan, the first in March 17, 2000 and the other in March 12, 2008, the third thunderstorm from 1961, the first time in the three thunderstorm, and in the first month. And the reason of this kind of weather is that the temperature in early Ji'nan is high, the humidity is big, the cold air has a strong convection after the south of the cold air. It is a little like the summer thunderstorm, the cold air affects fast, and the temperature drops very quickly.
[b] thunderbolt dropped from the sky [/b]
after a flash of lightning, the sky was so gloomy as to drop down, when the rain slowly stopped, the "ice particles" came down in Ji'nan, some of the "ice particles" had the size of soya beans, smashed on the roof, and sounded straight. Sun Changzheng, an expert on Ji'nan Meteorological Observatory, explained that in the weather report, the ice particles with a diameter of more than 5 millimeters are considered to be hail. The ice particles in Ji'nan yesterday were less than 5 millimeters in diameter and were called "shotgun" in meteorology. Hail often occurs in the summer and autumn seasons with strong convective activities, and sleet often occurs before snowfall or at the same time as snow.
[b] goose snow really big [/b]
[b] Ji'nan under the blizzard [/b]
after a shotgun, the sky drifting big snowflakes, like cotton clusters, fluttering and sprinkled. The snowflakes are large and seem to be very heavy, falling from the sky to the ground. According to the Ji'nan Meteorological Observatory, as of 17 p.m. yesterday, the average precipitation in Ji'nan was 6 millimeters, the maximum depth of snow was in Changqing, 3.5 centimeters, and the snowfall continued. Experts from Ji'nan meteorological observatory said that the snowfall in Ji'nan had already belonged to blizzard.
yesterday afternoon, the Ji'nan meteorological observatory issued the blue warning signal of blizzard. As the temperature continues to decline, the Ji'nan Meteorological Observatory also issued a yellow road warning signal to remind everyone to pay attention to travel safety.
[b] (>) expert analysis [/b]
[b] why a day "four face" [/b]
thunder, rain, shotgun, snow, four kinds of weather in the provincial capital, it is rare. Ji'nan meteorological observatory expert Sun Changzheng explained that, in the early period, the city continued to warm, low air temperature is high, and fog, warm and wet air strong, forming a "hotbed". The cold air force arrived yesterday was strong, resulting in a rapid decline in altitude air temperature. At this point, the lower air temperature has not yet fallen, relatively high, the formation of a special strong convection in the atmosphere, causing thunderstorms. Since then, with the decrease of atmospheric temperature and the weakening of convective weather, the precipitation that originally condensed into hail has softened into sleet. But when cooling down to the ground, the atmosphere is calm and stable.