Spring Arrives Today at 5:01 a.m. EDT in the Northern Hemisphere

Spring officially arrives in the Northern Hemisphere at 5:01 a.m. EDT. That's when the direct rays of the Sun pass over the Equator, technically creating "equal day and equal night" over the face of the Earth.

I've always observed the change of seasons with more reverence and awe than New Year's Eve. After all, the beginning of a new year is an arbitrary date which can actually be recognized just about any time during the year. However, an equinox or a solstice is a much more meaningful "event" and can be explained astronomically. The time is exact and changes every year although, for the most part, the date doesn't vary much.

The change of seasons is due to the 23.4 degree tilt of the Earth's axis. Because of the tilt, we receive the Sun's rays most directly in the Summer. In the Winter, when we are tilted away from the Sun, the rays pass through the atmosphere at a greater slant, bringing lower temperatures. If the Earth rotated on an axis perpendicular to the plane of the Earth's orbit around the Sun, there would be no variation in day lengths or temperatures throughout the year, and we would not have seasons.

Now that Winter is just about in our rear-view mirror, how did we fare as far as snow is concerned? Officially, one-and-a-half feet (18") of snow fell this season at the Bridgeport climate station, which is well below the normal snowfall (31.2) through today.

Southwestern Connecticut didn't experience much of a Winter. However, recent history suggests that the official change of seasons in the Northern Hemisphere doesn't necessarily mean a smooth transition from Winter to Spring.

Happy Spring!

Paul

Old Man Winter Delivered Vernal Equinox Snowstorm Ten Years Ago Today

A late-March snowstorm on the Vernal Equinox brought a half-foot of snow to several local communities and caused most school systems throughout the region to dismiss early, Friday, March 20, 2015. The snow began falling just after noon, and it became steadier and heavier throughout the afternoon, resulting in numerous fender-benders on local roads.

According to the National Weather Service official report, Weston led the way with 6.5 inches, followed by Norwalk (6.3"), New Canaan (6.3"), Shelton (5.5"), and Easton (5.5"). Just over five inches (5.3") fell at Sikorsky Memorial Airport in Stratford, which was just shy for the record for the date of 5.5" set in 1958.

The snowfall pushed the monthly snow total to 16.7", which is well above the normal (5.1") for the month of March. It also pushed the snowfall for the 2014-2015 season to 57.8", which eclipsed the previous year's total of 56.6" through the same date. The normal amount of snowfall through March 20 is just 31.2" based on 40 years of climatology.

Paul