The 2012 Report:
Today, Thursday February 2nd is Groundhog's Day, here's your official Twin Cities Groundhog Report.
At 8:00 this morning, it was 30 °F and a thick fog blanketed the land. In some spots there was less than a quarter mile visibility. As all the real groundhogs are still hibernating in Minnesota, our stand-in groundhog Stuffed
Stanley is the official groundhog of record.
We took Stanley outside and not surprisingly on this foggy morning, he did not cast a shadow.
to legend, the sudden appearance of the shadow scares the groundhog
back into hiding and we will have six more weeks of winter. If he does not see his shadow then spring will soon be here.
The official Twin Cities Groundhog Prediction:
The groundhog did not see his shadow in the Twin Cities so winter will soon be over.
What's the connection between Groundhogs, shadows and the seasons?
The connection is tenuous at best. Further south than Minnesota, male groundhogs do come out of hibernation early to scope out and check on their breeding territory. In Minnesota, February 2nd is usually too early for this to happen. Seeing the first groundhogs checking out their territory is surely a sign of spring though. The connection to shadows has to do with prevailing weather patterns. We often associate sunny days with warmth and the coming spring but sunny days in the winter aren't always warm. Clear winter days are often the result of cold Canadian air that has settled over the state. A shadow in the winter often means we're in a pattern of cold air flowing south. It can take many weeks to break that pattern and warm the land.
This year is of course very different. Cold Canadian air has had trouble pushing into Minnesota at all. It should be clear this afternoon and so in theory a groundhog would see his shadow but I don't think anyone is seriously concerned we might get six more weeks of winter. We're hard pressed to say we've had winter at all this year.
February 2nd is an important day. According to the solar calendar, it
should mark the end of winter and the beginning of spring.
days ago was the winter solstice, the day of the year when we have the
least sunlight. From that day on, the amount of daylight increases until
the day when there are equal amounts of night and day. We call this day
the equinox and it falls around March 21st. February 2nd falls half way between the solstice and the
equinox so in theory it should mark the end of winter and the beginning
Has anyone seen any crocus flowers blooming?
the winter solstice is not really mid-winter. Why do we call the
solstice mid-winter if it is really more like the day winter begins? This has
long been a puzzle and even caused a few arguments between astronomers
and meteorologists. The answer is something we call the lag of the
seasons and it affects Groundhog’s day as well. Yes, it is true that
Groundhog’s day technically marks the beginning of spring from a
celestial point of view but our experience tells us otherwise. Our
seasons lag behind what the sun tells us in the sky.
spring starts on Groundhog’s day is a little like saying a frozen dinner
is ready to eat as soon as it is pulled out of the freezer. The
northern hemisphere has been cooling down for months by the time the
solstice arrives. Forty-two days with just less than a minute more
sunlight each day is not enough to thaw out the frozen landscape into a
lush vernal garden.
The established pattern of cold weather
continues for many weeks after the beginning of the increase in daylight.
This lag makes it seem like mid-winter actually falls on Groundhog’s day
rather than the solstice. Rest assured though that on Groundhog’s day,
even if it feels like the middle of winter, we are getting an hour and
seven minutes more daylight today than we did just forty-two days
Groundhog’s Day may marks the beginning of spring
according to the sun but it will be about forty-two more days until we
feel the change enough to call it spring. It may seem like winter has a grip on the land but the
sun has been working hard to reverse the trend for over a month and
we’ll soon start to see those effects.
Incidentally, the legend
tells us that if the groundhog sees its shadow it will be scared back
into the den and we’ll have six more weeks of winter. Why six weeks? How many days are
there in six weeks? Forty-two. Six weeks takes us exactly to the spring equinox.
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