There’s Still Hope For Indian Summer! 9/24/18
Hello! Welcome to autumn! Fall officially arrived at 9:54 Saturday evening. The weather was fitting, as a gusty wind brought chilly temperatures to most of the region. While Saturday featured a good bit of sun & mild temperatures, Sunday saw a lot of cloudiness, at least down here in southern New England, along with cooler temperatures. One by product of all the high cloudiness around Boston yesterday was a spectacular sunset across the region last evening, with beautiful array of colors which included orange, red, purple and pink!
I was out and about doing errands, and was keeping an eye out on the clouds. Unfortunately, I gave up on the sunset, and did not take a ride over to my favorite spot at Millennium Park in West Roxbury. Boy, was that a mistake! By the time I got home the true colors of the sunset had only then began to span the sky. Even the rare reverse sunset showed up, with pink hues in the eastern sky!
A sharp cold front dropped down from Maine Sunday night, and brought record cold temperatures to northern Maine last night. Some areas had low temperatures down into the teens! Caribou achieved a record low of 25 degrees. Wow! Here in Boston, a gusty northeast wind and temperatures in the low 50’s was a reminder that fall has indeed arrived! Could this be a early sign for the upcoming winter?
Perhaps, but I wouldn’t look into too many signs for the upcoming winter during September. Long range computer models can help give us a better idea what’s going to happen, than signs from Mother Nature at this point. As we move deeper into October and especially November, that’s when I begin to pay close attention to natural signs that Mother Nature freely gives out, as to what the upcoming winter may have in store for us.
Before we get to winter, we still have a whole season of fall to get through! Like spring, fall has seems to have lost some of its luster in recent years. With ocean temperatures so unusually warm off our coast, it seems as if summer has been extending deeper into fall, until the pattern just snaps into winter sometime in January. Once the oceans sufficiently cool off, it also takes them longer to warm up in the spring, helping winter to linger deeper into our spring, which brings annoyance to many. I have been calling this the seasonal shift. The scientific terminology for this phenomenon is latent heating and cooling.
These patterns have thrown off Mother Nature’s timetable too. Leaves have been staying on the trees and not changing colors on time in the fall. In the spring, leaves remain closed, fearing late freezes and unusual late winter storms. Last year was a classic example of this delayed seasonal change. Boston saw its warmest October on record. This delayed the trees changing colors, and in some cases, they never changed at all. When freezes came in November, the leaves just died and fell to the ground. That, and along with black tar leaf disease, brought one of the most lack luster fall foliage seasons in memory around the Boston area.
What about this season? Can we expect another seasonal shift, will warm temperatures extending deep into December? Is the foliage going to peak around Thanksgiving, instead of Halloween? Many have been asking me when we can expect Indian Summer to arrive? These are all very good questions, which I will try and do my best to answer these to the best of my knowledge!
First, what I can see, is a battle of the seasons brewing. While it’s natural to see clashing air masses this time of year, this year appears to be more extreme than in years past. While the oceans are still abnormally warm off our coast, in much of central and northern Canada, winter is already settling in! There already has been several snowfalls in cities as far south as Edmonton in the province of Alberta, Canada!
Most long range computer models are predicting a weak El Nino this winter. If this holds true, winters are typically colder in eastern Canada. As we move deeper into the winter, this cold air begins to slowly press southward into the eastern part of the U.S. At first, this cold air is going to be held back by the warm oceans I spoke about earlier. This will mean a lot of back and forth temperatures as we head into October and first part of November. This period should average close to seasonal norms. Because it’s been so far above normal temperatures, it may actually feel cold at times this October.
Later in November around Thanksgiving time, and heading into December is when I believe things will begin to get very interesting around here. In general, I’m expecting an earlier start to winter this year. I feel that the cold in eastern Canada will be so overpowering, that it may penetrate closer to the coast earlier than previous years. At first, the very warm ocean will put up a fight! With the clashing of the cold air, and very warm water, this could lead to powerful early season nor’easters later in November, and especially in December.
Before we get to that, there is still hope for some Indian Summer! Many friends have been asking me whether we are going to have an Indian Summer this fall. What is Indian Summer? Well, many people have their own interpretation as to what they think Indian Summer is. Some think it’s a period of warm weather after the start of fall. While others think it’s a period of warm weather after the first frost. The true definition of Indian Summer is a period of warm, sunny weather, after the first frost, and after the leaves have fallen. To make this official, this would normally occur sometime later in November or even early December. My own classification of Indian Summer is any period of warm weather after a first frost, which typically happens sometime in October around these parts.
Last year, we had an endless Indian Summer. With October being the warmest on record, we really did not begin to see any frosts until later in October, and mid November in the city. Looking at some of the long range computer data, this year appears to be different. Rather than it being warm all of the time, I’m expecting an overall cooler pattern this October, with brief bursts of warm weather, which may only last a day or two. I’m also expecting frost to make an earlier appearance this year. On average, frost arrives in Boston’s suburbs around the first week in October, but doesn’t make it into the city until about the third week of the month, and not until around November 4th at Logan Airport.
With the chillier weather expected, I’m expecting a more vibrant fall foliage season this year. Last year, we were battling drought, record warm temperatures, and spotted black tar leaf disease. While I am still seeing some black tar disease, it’s definitely not as severe as last year. I’m also expecting cooler weather at the right time, and we’ve had ample amounts of rain to keep the trees healthy. The key now is that we need some chilly nights to get the trees to start shutting down their sugar intake. I believe this process is beginning, and with a less hostile environment this year, the leaves are going to put on a show we’re accustomed to around here!
So far, good color is beginning to show up across far northern New England. It may be behind right now, but I believe the recent chilly nights will begin to accelerate this process. This ‘color wave’ will begin track south as each week passes. Typically, trees change quickly in the highlands and mountains, then spread south into the valleys and coastal plains. A good rule of thumb is around Columbus Day weekend for central New Hampshire and Berkshires of Massachusetts. In these areas, peak colors come and go within 7 to 10 days. Due to marine influences, areas inside of I95 typically enjoy a full month of colorful trees, changing at various times through the month. On average, peak color slowly pushes through coastal regions the last week of October and first week of November. If the weather cooperates, it can be absolutely breathtaking!
I have already begun to see some trees changing in my neighborhood. Early signs are showing some bright colors. If the weather cooperates with chilly nights, this trend should continue as we head into October, reaching peak color around Halloween. Let’s hope for the best!!
Now for your weekly autumn outdoor activity forecast. I will rate this week a 6 out of 10. A northeast wind blowing in off the ocean will maintain low clouds in eastern Massachusetts this afternoon. Across northern New England, it should be mainly sunny. It will be chilly, with high temperatures only in the 50’s region wide, except low 60’s in parts of Connecticut.
Tonight will feature a continuation of the cool weather. Clouds may break at just the right time this evening to view the beautiful full “Harvest” moon! Try and catch a glimpse! Later on, couds will begin to increase ahead of our next weather system.
A warm front will be approaching New England on Tuesday. At first, this may sound like good news. However, because of the unseasonably chilly air anchored over New England, this will present problems for our weather. The warm air, will ride up and over the cool air, this will create rain. Watch for rain to spread from west to east during the morning hours, reaching the coast by late morning, if not sooner. It will turn into a soaking rain during the afternoon, with heavy downpours. While it won’t warm up too much, it will be noticeably warmer than today, with highs reaching the 60’s.
As the warm front passes through our region tomorrow night, the weather is going to become steamy, with areas of dense fog, and more showers. Temperatures will not fall much from the highs during the day. in fact, they may even rise overnight.
Wednesday will be one of those days I was talking about earlier, where it will feel like summer again! Watch for muggy weather, with some breaks of sun. It will be warm, with high temperatures spiking to near 80 degrees!
A strong cold front will be approaching the area late in the day. If we see enough breaks of sun, some places, especially across the interior of New England may have some severe thunderstorms during the late afternoon. These storms should weaken as they approach the coastal plain, but a thunderstorm can not be ruled out after 7 pm on Wednesday.
Watch for generally dry and seasonable weather to sweep into New England for the period Thursday through Sunday. A small system passing to our south may bring a slight chance of some showers Friday night into early Saturday, otherwise, it’s looking fairly dry at this point. Temperatures should generally be in the 60’s and low 70’s during the day, and 50’s at night. Fairly seasonable to perhaps a bit above, but pleasant weather nonetheless.
Well, that’s about it for now! In next week’s blog, I will have my summer review, and give myself a grade! I will also have a preview of October, and review September. I will also have a new fall foliage report, and talk about the upcoming fall weather patterns. In the meantime, if you love summer, start praying for Indian Summer…the countdown to winter has begun!
Thanks for reading!
Pete
~Happy Birthday tomorrow to my nephew, Nicholas!~