"Summer rain separates the cow's back, and birds wet half their wings", which is a folk proverb, means that summer rainfall has strong locality. Yesterday evening, there was a short-term "cow's back rain" in Wuhan: when Hankou was covered with downpour, Wuchang was sunny. What is cow's back rain? What is the cause of the cow's back rain? What is the rain on the cow's back?
"Rain on the cow's back" is the abbreviation of "Summer rain separates the cow's back", which is used to describe that there is rain on one side of the cow's back, but there is no rain on the other. "Summer rain separates the cow's back, and the bird wets half of its wings". Folk proverbs often describe the uneven distribution and short-lived rainfall in midsummer, and call it "cow's back rain". People who have lived in mountainous areas for a long time or frequented there know that the weather in mountainous areas is complex and changeable, and such weather changes often occur. This beam is full of dark clouds, but the sun is shining on that beam. The wind and rain on this slope are fierce, but the weather on that slope is beautiful, so there has always been a saying that "ten miles are different from the sky". The reason of cow's back rain < P > This is due to the uneven distribution of rain clouds and uneven heating of the ground, which causes strong and weak air convection in a small area, and it is easy to form a small thunderstorm in the afternoon to evening. In the past, "cow back rain" mostly appeared in mountainous areas, but now urban high-rise buildings have sprung up like mushrooms after rain, creating the necessary environmental conditions for the generation of "cow back rain".
"Cow's Back Rain" needs two conditions: First, the upper air in this city is affected by cold vortex or its edge; Second, there must be tall and complex terrain or features, so that small cyclones (an air vortex rotating counterclockwise) or small anticyclones (an air vortex rotating clockwise) are generated during the air flow crossing. Small cyclones are beneficial to the formation of rainfall and the enhancement of rainfall potential, while small anticyclones have inhibitory effects on rainfall. Precautions for indoor lightning protection
1. Pay attention to closing doors and windows to prevent lightning from directly hitting the room or preventing the invasion of side lightning and ball lightning? 2. People should not stand under the electric light. ? 3. Try not to call or answer mobile phones and landlines, or use telephone lines to surf the Internet. ? 4. Showers and solar water heaters should not be used. Because water pipes are connected with lightning protection grounding, lightning current can cause casualties through water flow conduction. ? 5. Stay away from metal objects such as water pipes and gas pipes exposed from buildings. ? 6. Before the thunderstorm comes, disconnect the line and unplug the power plug. Don't let TV sets, computers, etc. lead thunder into the room, and damage electrical appliances will cause fire accidents. ? 7. Don't pull the wire for drying clothes and bedding to the window or door, so as to prevent the wire from causing death. ? 8. When going out in heavy rain, it is best to wear rubber shoes, which can play an insulating role. ? 9. Never stick your head and hands out of the window when it thunders on the way.