What do you think of weather radar?

Question 1: What do you think of the weather radar chart? The color of weather radar is generally from blue to purple (the intensity is increasing). The darker the color, the smaller the area, the greater the probability of precipitation and the stronger the intensity. In summer, the area covered by the red * * * domain is prone to short-term strong convective weather (strong wind, heavy rain, hail and so on). ). Online weather usually provides radar images in recent hours. By playing the animation, we can intuitively see the changing trend of precipitation area.

Here are some examples:

1. On the weather radar chart, there is usually an area surrounded by palace color echoes due to rainfall. Generally speaking, it may rain in light green, and it will definitely rain in dark green.

2. The radar echo changed from blue to purple, and the rainfall intensity gradually increased. Generally, the bright yellow * * * area generally corresponds to the rainfall intensity of about 10 mm/h, and the warm red radar echo generally corresponds to the rainfall intensity of about 20 mm/h, and there may be strong convective weather such as short-term thunderstorm, strong wind and hail.

Question 2: How to read the weather radar chart? Hello, landlord! Radar map is also called contour map, as the name implies, that is, the same amount of data is different from the same amount of data. As a weather radar chart, this data volume can be understood as rainfall, and the professional point is called dBZ. That is to say, on a weather radar map, the dBZ values are the same in areas with the same color. What is dBZ? The dBZ value represents the sum of the six powers of the diameter of precipitation particles per unit volume (unit 6mm/m3), and reflects the scale and density distribution of precipitation particles within the meteorological target. In fact, we don't care how this value is calculated, we just need to know that this value represents the meteorological intensity. Generally speaking, more than 40 means rain. Note: The contrast between dBZ value and color should be at the lower right of each weather radar chart.

Question 3: What does the radar chart in online weather forecast mean? what do you think? The radar chart in weather forecast consists of local maps and irregular color blocks, with colors ranging from blue to green, yellow, orange, red to purple. Next to the map, there is the radar station name, time and data range, and there is a vertical color bar marked with numbers. From blue to purple, the numbers are getting bigger and bigger, and the unit of numbers is dBZ. The range of dBZ is 10-70 dbz.

On the radar map, the color indicates the echo intensity of weather radar, and the gradual change from blue to purple indicates that the echo intensity is from small to large, and the rainfall intensity is gradually increasing. DBZ is called reflectivity factor unit, and the higher the value, the greater the precipitation intensity.

Generally speaking, the area corresponding to the blue echo indicates that the local area is covered by precipitation clouds, but it has not rained yet; The area covered by green echo represents the local immersion in light rain; There is moderate to heavy rain in the area covered by yellow to red echo; The area with purple echo has the highest precipitation intensity, and this area is "falling into" heavy rain, even heavy rain, and may be accompanied by severe weather such as lightning, strong wind and even hail.

This is what the radar map in the weather forecast looks like.

Question 4: How to distinguish rainstorm from hail on weather radar map? Simply put, above yellow is likely to be moderate to heavy rain, and above red is generally heavy rain. If there is hail, the color must be above crimson, even purple or white. Then it is necessary to combine VIL, echo top height, mesocyclone and vertical profile to make a more accurate judgment.

Question 5: Which meteorological software can read the radar chart? The Central Meteorological Observatory is located on the official website, and the data of nearly one day can be transferred from all over the country, regions and single radar stations.

Question 6: How to read the weather radar chart? What do you mean by different colors? 20 points green is land. Yellow is desert. Black is the ocean.

Question 7: How to read satellite cloud pictures and weather radar pictures on meteorological websites? Seek answers. Ahem, just kidding. More people are interested in meteorology and more people know about meteorology, which is exactly what we hope ~ _ (:з∠) _

First of all, I have some answers to the question about cloud pictures. See: How do non-professionals use satellite cloud images to understand the weather? However, there may be some ambiguity on that issue. In fact, it is difficult to judge whether it will rain simply by looking at cloud pictures, so it is necessary to have a solid meteorological foundation and learn many courses. Satellite cloud pictures can be used to judge the water vapor and cloud cover in a large range. Without a good synoptic foundation and understanding of satellite principles, it is difficult to understand the mystery. Moreover, many people have a misunderstanding that rain can be judged by looking at cloud pictures. In fact, satellite cloud images are mainly an auxiliary means of weather forecasting, which can understand the real cloud cover and weather distribution in a large range. How to manage the next place with such a large-scale cloud map?

So, what I want to say is radar echo. This is actually very interesting and you don't need to master a lot of professional knowledge. I have also answered this question: why is there color on the reflectivity of the basic radar but it doesn't rain? Because the spatial and temporal resolution of radar echo is higher, the websites of China Meteorological Bureau and many local stations provide radar echo, and the professional requirements are not so high, so I recommend you to learn that. Simply put, the greater the echo intensity, the more likely it is to rain. According to the movement of strong echo center, the trend of storm movement can also be judged. This is relatively simple. After we have a basic understanding of radar echo, we can be "advanced by experts" ~ We can judge whether there are medium cyclones, squall lines, fuzzy speed, overhanging echoes and zero-degree bright areas through radar echo ... These can be seen in radar meteorology. In reading pictures, non-professionals can ignore the basic formulas and master the skills of reading pictures. For example, this courseware, Radar Meteorology 7- 1_ Baidu Library in Baidu Library, can help us understand more features of storms.

I hope my answer can help you. : )

Question 8: How to judge the weather by using the dBZ value in the radar chart of basic reflectivity? Such as cloudy days, thunderstorms and sunny days. Thank you. Dbz can be used to estimate the intensity of rainfall and snowfall and predict the possibility of disastrous weather such as hail and strong wind. Generally speaking, the greater the value, the greater the possibility of rainfall and snowfall, and the stronger the intensity. When its value is greater than or equal to 40dbz, thunderstorm weather is more likely, and when its value is above 45dbz, strong convective weather such as rainstorm, hail and strong wind is more likely. Of course, when judging the weather, we should consider not only the echo intensity (dbz), but also the echo height, echo area, echo moving speed, direction and evolution. Z is the radar reflection factor, which is proportional to the sixth power of the raindrop spectrum diameter, and the unit is mm6/ F 3 (6 and 3 are both powers); Db is a decibel, which can also be understood as an operation symbol. The conversion relationship between dbz and z is: dbz = 10 log(z).