The Macau Meteorological and Geophysical Bureau (SMG) issued a statement yesterday predicting that the temperature in spring, which lasts from March to May, will be normal to higher than average, while rainfall throughout the season will be normal to lower than average.
The spring season is a transitional season when the winter monsoon changes to the summer monsoon, with wet and rainy weather common in Macau at the beginning of spring due to the easterly flow of a cold trough of high pressure out of the sea, after which the cold trough of high pressure affecting the Chinese mainland will gradually weaken and temperatures will gradually rise and a trough of low pressure will then affect southern China, according to the statement.
Therefore, the statement forecast, precipitation will increase towards the end of spring in Macau (around the start of May) and will be accompanied by thunderstorms.
The statement said that the La Niña weather phenomenon is expected to subside in the spring.
According to Wikipedia, La Niña (“The Girl” in Spanish) is a complex weather pattern that occurs every few years, as a result of variations in ocean temperatures in the equatorial band of the Pacific Ocean. The phenomenon occurs as strong winds blow warm water at the ocean’s surface away from South America, across the Pacific Ocean towards Indonesia.
In accordance with World Meteorological Organisation (WMO) guidelines, a normal climate range for spring temperatures of 21.9°C to 22.6°C and cumulative rainfall of 380-640 mm was derived by calculating the climate normal (CN) from 1991 to 2020 and using quantitative methods.
According to Wikipedia, the climatological normal or climate normal (CN) is a 30-year average of a weather variable for a given time of year. Most commonly, the CN refers to a particular month of the year, but it may also refer to a broader scale, such as a specific meteorological season. More recently, the CN have been reported for narrower scales, such as a certain day of the year and even on an hourly scale.
This image provided by the Macau Meteorological and Geophysical Bureau (SMG) yesterday shows its weather forecast for spring.
