Weather of Arabia - Astronomical calculations indicate that the date of the spring equinox for this year 2023, in Jordan and all countries of the northern hemisphere, falls on Tuesday, March 21, at 12:24 am, when the sun is perpendicular to the equator, and in This day ends fiftieth this winter and the astronomical spring begins.
The sun rises in the city of Amman on the day of the spring equinox 2023 at exactly 6:35 minutes in the morning from the eastern horizontal angle completely at 90 degrees, and the sun sets at the completely western angle at 270 degrees at exactly 6:48 in the evening, and on this day the length of night and day is equal Almost all over the globe.
Starting from the day of the spring equinox, daylight hours gradually increase in the northern hemisphere, as a result of the sun's gradual movement towards the north, which leads to an increase in the amount of solar radiation that reaches our region, and thus temperatures tend to rise gradually.
It usually begins with the spring equinox, the period of activity of the Khamaseen depressions, during which depressions are generated in the south of the Atlas Mountains in the Maghreb, and it moves towards the east and runs near the coasts of North Africa until it reaches the eastern Mediterranean region.
These Khamseen depressions are usually preceded by hot, dry, dust-laden south winds, called the Khamseen winds , which often lead to infections in the throat, eyes, and respiratory system due to the suspended materials carried by the Khamseen winds.
The dust also causes a decrease in the horizontal visibility, which leads to the disruption of vehicle movement and the closure of some airports, ports and public facilities in many countries in the region.
Dry winds are followed by moist westerly or northwesterly winds, and sometimes cases of atmospheric instability arise, accompanied by thunderstorms of rain, which may be "mud rain" sometimes due to the dust attached to it during its precipitation.
Rainfall, which usually falls from the beginning of spring until mid-May, as an average calculated over long periods, constitutes 11% of the average rainy season in Jordan.
The average climatic maximum temperature in the spring season for the capital, Amman, is 25.7 °C, while the average minimum temperature is 12.3 °C. The climatic record of the capital, Amman, indicates that the highest temperature recorded in the city of Amman during the spring season was 41.7 °C on 06/20/1942, while the lowest recorded temperature was -2.8 °C on 03/22/1922.
The city of Amman also recorded the highest daily rainfall total for the spring season on March 26, 1967, amounting to 60.9 mm, while the highest cumulative rainfall total during the spring season amounted to 160.3 mm in the 1970/1971 season.
At the level of the Kingdom, the climatic records of the meteorological stations of the Meteorological Department indicate that the astronomical spring season in previous years witnessed the following:
It is worth noting that snowfall after the vernal equinox day is not considered an exceptional event in the Kingdom’s climate, as climate studies in the Climate Directorate/Meteorological Department indicate that the Kingdom has witnessed, during the last 50 years, snowfall after the vernal equinox day in the months of March and April, as it witnessed 13 A year of snowfall in the month of March, the last of which was in the year 2020, while 8 years also witnessed snowfall in the month of April, the last of which was in the year 2019.
Source: Jordan Meteorological Department
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