On December 15th, it was reported that the snow was like nothing, and the difference between the salt and the air could be imitated, and the catkins were not as good as the wind!
The weather forecast for the past two days says that there will be heavy snow or even heavy snowfall in many areas, so many people are looking forward to goose feather-like snowflakes in the sky, and the ground will be completely covered in a short time, but is it really only this dense snowflake worthy of "blizzard"?
According to the national meteorological standards, snowfall is divided into:Light snowfall (scattered light snow), light snow, moderate snow, heavy snow, blizzard, heavy blizzard, very heavy snowfallThere are 7 levels in total, and the standard generally uses two standards: 12 hours and 24 hours.
Based on the 24-hour precipitation, the precipitation is less than 01 mm is a trace snowfall (scattered light snow), 01 to 24 mm for light snow, 25 to 49 mm for moderate snow, 50 to 99 mm for heavy snow, 100 to 199 mm for Blizzard, 200 to 299 mm for a large blizzard, reaching or exceeding 300 mm is a very heavy blizzard.
Based on the 12-hour precipitation, the precipitation is less than 01 mm is a trace snowfall (scattered light snow), 01 to 09 mm for light snow, 10 to 29 mm for moderate snow, 30 to 59 mm for heavy snow, 60 to 99 mm for Blizzard, 100 to 149 mm for a large blizzard, reaching or exceeding 150 mm is a very heavy blizzard.
That is to say,24-hour precipitation at 100 to 199 mm or 12 hours of precipitation at 60 to 9A snowfall of 9 mm is called a blizzard, it needs to be reminded that above the level of Blizzard, there are also big Blizzards and extra-large Blizzards.
The same is a blizzard, if 15 mm of snowfall is evenly distributed over a 24-hour period, it gives the impression that the snow is sparse, but continuous;However, if 15 mm of snow falls in a short period of time, it gives the impression that the snowfall is dense, short and heavy.
"Goose feather snow" describes the size of the snowflakes rather than the magnitude of the snowfallSo even if it doesn't last long, it's not necessarily Blizzard.