When the first day of winter season arrives is a matter of definition. The season can start on either “Meteorological winter,” or “astronomical winter”. Technical terms aside, winter’s arrival in real life is pretty easy to figure out.
Winter 2010 commencing
If going by a meteorological standpoint, winter 2010 will start on December 1. The winter solstice is the first morning of astronomical winter season. On this year’s calendar, Dec. 21 is the day. Winter did not wait for any human explanations this year. December 1 was certainly not the start of winter this year. In fact, snowstorms had already been hitting for a couple of weeks. La Nina is what has influenced the climate a lot this year. The equatorial Pacific has a drop in ocean temperatures when La Nina happens. La Nina changes the weather. In fact, the northern U.S. ends up with much worse winter conditions.
1st day of winter season two instances
The coldest period of average temperature is what describes the true commencing of the meteorological winter season commencing on Dec. 1. The shortest days generally are when there is the coldest climate. This is anytime between November and Jan usually. In Jan, the snow pack really helps the atmosphere to stay cooler which is why the coldest part of the meteorological winter is usually then. Astronomical winter season will start on the December 21st solstice, the shortest period of daylight in the northern hemisphere. The meteorological winter season days start to end after the solstice when days get longer. The vernal equinox does not occur until March 21, 2011 which can be the end of the astronomical winter season.
The 2010-11 winter season weather
Spring tends to be coming too late and winter season coming too early. This is mostly for those places where short daylight and weather impact them. Accuweather.com accounts that the Northwest, Great Plains, Great Lakes and New England will see winter weather the worst. Above normal snow and ice is within the forecast for these regions. For relief, consider going south. A “non-winter” is predicted from California to the Southeast.
Data from
Archeoastronomy.com
archaeoastronomy.com/2011.shtml
Accuweather.com
accuweather.com/blogs/news/story/40340/accuweathercom-winter-forecast-1.asp
Wikipedia
en.wikipedia.org/wiki/Winter
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