Central Illinois Winter Temperature Summary, 2014-2015

Now that winter is officially finished, we can look back at the temperature data and compare reality to what we remembered. I think everyone here in Central Illinois perceived our latest winter to be warmer than the one before it, but prolonged cold (and warm) spells have a way of making comparisons difficult from year to year. The data is presented again this year in the form of combined bar and line charts. The blue bars represent the deviation of the daily mean temperature from the historical average where each bar represents one day. The red curve represents the cumulative deviation from the historical average, and indicates whether the season as a whole was colder or warmer than what we'd typically expect.

The first observation I'd like to bring to your attention is the value of the red curve at the right side of the chart. Including data from March 20, the cumulative deviation from average was -3 degrees. That's almost as close to "normal" as one can get. That means, on average, the daily mean temperature was about 0.03°F colder than the historical average each day. That's a temperature difference most of us can't perceive. It's also probably a smaller number than the error in the measuring equipment at the National Weather Service in Peoria, not to mention the fact that the daily mean temperatures I use are reported as integers that have already been rounded a fraction of a degree each day.

It's also interesting to note that the winter as a whole was warmer than normal until the last week of February, indicated by the red curve crossing the x-axis into negative territory on February 26. February 27 added momentum to that move by recording the largest deviation from average of 28 degrees F below the historical mean. The deviation of 23 degrees F above normal on March 23 recorded the largest deviation on the warm side.

By comparison, we can look again at the data from the winter of 2013-2014 and notice that the cumulative temperature that winter was above normal only a few days all season. I think most of us are happy not to repeat those temperatures this year.

To illustrate just how unusual our temperatures were last winter, I've plotted the cumulative deviation curves for both winters on the same scale on this chart. In both cases, February contributed the largest cumulative degrees below normal, but this year a significant warming trend began on March 7 that carried through the end of the season. Another significant difference this winter was the 18 consecutive days of warmer than normal temperatures beginning on January 15. Those days averaged 10.5 degrees above normal and contributed greatly to counteracting the colder than normal periods.

Since our historical mean temperatures are still low enough to expect heating degree days this time of year, we are technically still in our heating season. We'll continue to compile data to see whether this heating season as a whole was warmer or colder than average.

Maple Sap Harvesting

Our neighbors had good success last winter harvesting maple sap and converting that to syrup, so we all anticipated the products of this year's harvest. Even though the trees were tapped a week earlier than last year, the weather this year has not been as ideal for producing lots of sap.

The sap flows best when nighttime temperatures are well below freezing, and daytime temps are well above freezing, preferably with some sunshine thrown in. Prior to March 6, the temperatures tended to be too cold, but the forecast for that day and those following looked promising enough to put Philip and his sidekick Josh into action. I didn't see Josh helping with the tapping last year, so I presume he was in training when they stopped by our house this year. In this shot it appears I distracted Josh from his responsibilities.

With all three of our trees tapped, the guys were ready to move on to the next target.

Unfortunately, the weather has tended to be too warm most of the nights over the last two weeks, so the sap hasn't been flowing as well as it did last year. This picture shows the first 24 hours of production on one of our trees that had two taps running into this container. The low temperature that first night was 29°F while the high the next day was 51°F. There appears to be a little less than a gallon in this jug since I think the container holds about 5 gallons when full.

After 48 hours the container appears to be over half full. The low hit 27°F the night before, and 51°F again during the day, so conditions were sufficient to keep a decent flow of sap moving.

We've had a few good days since, but more poor days than good ones so far. It appears that the sap production may be lower than last year's harvest, which means the syrup may be in shorter supply. Our neighbors have boiled down a couple of batches of sap in the last two weeks, producing about 9 gallons of syrup which is a far cry from last year's total.  Although the near term forecast doesn't look ideal, the maple syrup season may not be done yet!

Happy Pi Day 2015!

Once every century our calendar and clocks order themselves in such a way to duplicate more than just a few digits of pi (the number representing the ratio of a circle's circumference to its diameter). Using American dating format, today's date is 3-14-15 which is the first four digits (not including the 3 on the left side of the decimal), and only occurs every 100 years. If one includes the time of day, we could represent 9:26:53 which would give us another 5 digits.  Since seconds can be represented with fractional parts, we could technically represent an infinite number of pi digits: 3-14-15 9:26:53.589793238462643383... I think you get the idea.  We'll stop at nine digits today and be happy with that.

To celebrate, we ate three pies for supper this evening as shown in the photos below. 

The overview of the table before we began this evening.  Not visible in this view is the bunting that crossed the room five times. It added an air of festivity to the celebration, but alas, it wasn't directly related to the number pi.

Our first course was this Chile Chicken Potato Pi decorated with the first 15 digits of pi on little banners around the rim of the pedestal supporting the pi. This was our first try for this recipe, which received thumbs up from the family and will be repeated again some day!

The first dessert course was this Chocoroon Pi that is a family favorite.

Costco provided the second dessert course with their jumbo Apple Pi. We had one of these a few months ago, and found it to be one of the best apple pies we've ever tasted, hence it's appearance on our table again tonight. At 75 ounces, this monster would challenge any contestant at a pie eating contest!

As I'm writing this, it occurs to me that there was one moment in history when the date and time matched pi even better than today: March 14, 1592, at 6:53:58. I guess we'll have to content ourselves with the second most significant celebration of Pi Day.

I'm also aware that some guides to the Greek language suggest pi should be pronounced "pee." When considering celebrating this important number, I'd rather trust the common modern pronunciation than spend more than a few seconds contemplating celebrating per the other pronunciation.

Colonial Williamsburg at Christmas: A Beautiful Saturday

Our first full day in town on this trip included delightful weather which was about 15 degrees F warmer than average for December 27, and gloriously sunny.  Not surprising then that the crowds in the Historic District were the largest we've ever seen here any time of year.  Combine beautiful weather with the weekend between Christmas and New Years and festive decorations around Colonial Williamsburg, and it's not difficult to understand why others would want to be there with us.

 The decorations around CW are different at each building (as far as we could tell), and usually consisted of a wreath or similar arrangement of natural materials, often including food. Here's an example on one door whose peacock feathers caught our eyes.

Although Bassett Hall is a modest home from the Rockefeller's perspective, I think the main entrance has some elegance and is enhanced by these holiday decorations.

A closer view of one of the arrangements next to the door...

... and a closer shot of the wreath above the door.

This arrangement graced the entrance to one of the taverns.  Apples seemed common to many of the decorations, and often included apples of different colors like in this example.

Finally, lest you doubt the beauty of the weather, I include this shot of the girls approaching Bassett Hall -- beautiful enough to almost make you wish you lived there.

Colonial Williamsburg at Christmas: "Twelfth Night" Performance

We've attended several wonderful concerts in the Ballroom at the Governor's Palace, but we've never seen one of Shakespeare's plays performed there -- until now.  Although there's no record of any theatrical event taking place at the Governor's Palace in the 18th century, this adaptation of Shakespeare's "Twelfth Night" was our first opportunity to see Shakespeare performed in a colonial era setting with 18th century costumes.  I'm glad we went.

Although the play was performed ten times in December, we were unaware of its existence until about a week before we were scheduled to begin our trip.  Karen saw a Colonial Williamsburg blog post that offered two free tickets through a random drawing, and decided to enter.  To her surprise, she won!  The only problem was that we won tickets for a sold-out performance scheduled for the day BEFORE we planned to arrive in Virginia.  Fortunately, our schedule was flexible, so we were able to leave home a day earlier than planned, and made it to town a few hours before show time!

The performance was not a disappointment.  The actors were all very talented, and presented Shakespeare's 16th century language in a way that was relatively easy to follow.  The costumes were nicely executed, and the actors even made some references to the room in which the play was performed.  The fact that we got to visit with most of the cast after the show was simply icing on the cake.  In the photo above, Karen and I are in the middle surrounded by eight members of the cast, and Ralph and Dotty on the right, who also won tickets to the play.

The moral of the story: if you see a contest, enter it!  Especially if entering is free, and the prize is something fun you can't do every day!