Today, September 1, is the first day of meteorological fall.
Over the past few years, I’ve noted new weather terms.
—Derecho
—Atmospheric river
—Firenado
And each of the seasons preceded by the word “meteorological”.
Maybe this concept has been around for a long time and I just didn’t notice. Entirely possible. I suspect that since the expansion into 24-hour news and weather; we get a lot more data and information than we used to when Walter Cronkite was telling us what we needed to know in half an hour. The news and weather forecasters have to fill up all that time with something.
All conjecturing aside, I delved into just exactly what this specific weather term means.
It turns out to be very simple.
The actual dates of the four seasons can vary by a day or so. Spring may arrive on March 20 or 21. Fall this year shows up on September 22 at 1:19 PM, Central Daylight Time, in the Northern Hemisphere. The precise moment the center of the sun will cross the equatorial line in its trek from north to south. On one of the two equinoxes each year, we will have roughly the same amount of daylight and dark.
For those who track and monitor weather, this shift of date presents a problem. One year, people could attribute a temperature to summer, and the next year, they could credit the same date to the fall records.
Enter the meteorological seasons.
The system divides the year into equal quarters for record keeping.
December – February is meteorological winter
March – May is meteorological spring
June – August is meteor0logical summer
September – November is meteorological fall
There you have it.
Happy Meteorological Fall!