Spring Setback! 3/28/16
Hello! I hope everyone had a Happy Easter! Overall, it was a fairly typical March weekend across the region. As is typical this time of year, the chilliest spots were coastal areas, where temperatures struggled to reach the low 40’s. In addition, low clouds were stubborn to burn off, each day.
If you live in the interior of New England, temperatures were actually warmer, and you enjoyed mostly sunny skies for much of the weekend. Quite a contrast from folks who live near the coast.
Why such chilly temperatures along the coast? The answer to this question is quite simple. It all has to do with the weather phenomenon called latent heating and cooling.
Remember those warm days in late autumn? You can thank the warm ocean for that in the fall. It takes longer for the oceans to cool down than the land during the fall. This keeps coastal areas warmer than the interior during autumn.
However, coastal areas are paying the price for that now. During the spring, the oceans take longer to warm up than the land. This promotes chilly seabreezes to blow in from the ocean.
The process works like this. As the sun gets stronger, it warms the land up quickly in early spring. As that air rises off the land, cold, dense air rushes in from the ocean to fill that void.
Because the ocean is still cold this time of year, tempertures can be close to 20 degrees colder along the coast, than inland areas! In some years, this can be a brutally slow process to punch our way into summery weather.
This is why we have that famous saying that we all like to say around here, “it’s gonna go straight from winter to summer!” Living here my whole life, I would say this statement has merit!
Not every year, but I would say this is the case in about 5 out of 10 springs. So about half of the springs it’s cold most of the spring, only to suddenly turn into summer around Memorial Day.
In 3 out of 10 springs, the weather goes back and forth, with times of chilly weather and times of warm. Then there’s the minority, where the warm weather comes early…and stays. This only happens in only 1 or 2 out of 10 springs around here.
This was the case in the spring of 2010, then again in 2012. Last year, snow from our record winter did not finally completely melt until July 15th here in Boston!
How about this spring? Well, we certainly got off to a very warm start for the first half of March. However, things have cooled off since then. We even had close to 4″ of snow last Monday, on the official first day of spring!
Despite the cooler weather, March will still finish above average. In fact, this will be Boston’s 9th straight month of above normal temperatures.
The only exception to this was last October, which featured exactly average temperature departure. It certainly has been a warm stretch of weather around here.
Is the warm streak going to continue into April? Right now, this is very questionable. At some point, we’re going to have a below normal month.
When I study the weather, I love looking at the trends. Weather goes in cycles. Kind of like when we get into a daily routine, and repeat the process everyday.
The weather likes to do the same thing. Last winter, Mother Nature got us into a particularly rough stretch, slamming Boston with 2 consecutive blockbuster snowstorms, and 2 blizzards, within a 5 week period!
However, ever since last July, I say we’ve been on easy street! Looking at some of the long range guidance this morning, April is looking shaky to me. In fact, the first few days of the month is going to feel more like winter than spring around here.
This cold blast won’t have much to do about the cold ocean, but rather more from larger scale teleconnections that will unleash the wintery visit to our region.
So where is this cold blast coming from? First, I can tell you a couple days ago, this was looking a lot worse than what it’s looking now! I’m sure this will have no solace, as you break out the winter coats again, early next week!
A couple days ago, computer models were also showing a late season blizzard to go along with the unseasonable cold. And make no mistake about it, blizzards have occurred during the first 10 days of April in the past around here.
Thankfully, models have backed off this scenerio. In fact, in keeping with the theme of the winter, models have even backed off the severity of the cold expected, alltogether.
With that being said, it’s going to be cold enough to break out the winter gear once again! I would say daytime temperatures in the 30’s, and nightime lows in the teens and twenties for next Monday and Tuesday. Brrrr!
There’s still an outside shot that we’lleven see some snow at some point next week. After all, Boston does average about 1″ of snow during April.
We normally do not see this 1″ every year. April snows are either big, or nothing. We either get a blizzard or no snow for years at a time. The last big snow in April actually occurred way back in 1997, when the April Fools Blizzard crushed the region with between 2 and 3 feet of snow!
With El Nino quickly collapsing, winter seems to want to get a few good licks in before it retreats north. As a ridge of high pressure builds in western Canada, a cold pool of air bulding up in Canada, is going to dive southeastward next weekend.
In addition, teleconnections in the Pacific Ocean is going to keep impulses of chilly weather diving into New England at least for the first week of April. If these connections were to continue, a cooler than normal April may be the outcome.
Thereafter, after mid month, things may begin to warm up a bit, but no early summer heat is indicated at this point. We shall see if our streak of above normal months continues or not.
Speaking of summer, early indications are pointing towards a hotter summer than the last two around here. This is mainly due to a collapsing El Nino, and the onset of La Nina conditions. A warmer than normal Pacific ocean may try and foul this up. My official summer forecast will be released on Monday, May 23rd.
Now for a segment of weather history. Last week, I mentioned I was going to talk about a severe spring storm. You may of thought I was going to speak of the 1997 April Fools Blizzard. This would of been a good guess, but I’m actually going to talk about another storm.
Back on this date, in 1984, a severe spring storm battered the region. It was a volatile pattern leading up the the storm. Weather people were on gaurd, as a huge contrast in temperature developed acros the United States.
Blistering hot weather was building in the south, with 90’s to even some 100’s showing up in Texas. Meanwhile, unusually cold weather was building down from Canada into the northern part of the United States.
This contrast in temperature very much included New England. Looking at the weather map, it didn’t take long for a storm to develop. Feeding off the huge contrast in temperature, the storm developed in the middle of the country.
Severe weather outbreaks were common in the south, and blizzard conditions in the north. In typical spring patterns, this storm would of tracked northeast, and end up in central Canada.
This one was different. This storm continued to intensify, as it moved due east, passing south of New England. As it moved to the mid Atlantic coast, the storm further intensified into a class just below hurricane strength!
In addition, with the storm passing to our south, this placed Massachusetts on the cold side of the storm. I will never forget the hurricane force winds produced from this storm.
Icy snow caked on power lines and pine trees, as winds roared from the northeast. In one of the highpoints of my weather memories, me and one of my best friends, watched in awe, as the storm toppled a 70 foot pine tree right in front of us!
Because so much icy snow was piled on one side, and the wind blowing fiercely in one direction, there was no danger of the tree hitting us. Other trees toppled and snapped, sending hundreds of thousands of people into darkness with no electricity.
The combination of heavy, wet, icy snow along with the hurricane force winds, made this storm one that I will never forget. My good friend still remembers this storm, too!
Now for your weekly outdoor spring activity forecast. I will give this week a 5 out of 10. Expect damp, and cold weather for the rest of your Monday. Winds will be out of the northeast, and temperatures will only be in the low 40’s.
After some early evening showers, winds will shift into the west, which will help dry out the atmosphere. Temperatures will not turn that cool, with lows mainly in the 30’s and lower 40’s.
Watch for very windy weather Tuesday! As the storm intensifies in the Canadian Maratimes, winds will howl out of the northwest tomorrow, with gusts between 40 and 50 mph! Temperatures should be near 50, but the winds will make it feel much colder than that. Winds will relax tomorrow night, with lows mainly in the 20’s and 30’s, warmest in urban areas.
Wednesday should be the pick of the week, with mostly sunny weather and light winds, with highs near 60.
Thursday and Friday should be even warmer. In fact, if we get some sun, temperatures could make a run at 70! However, there is the threat of some showers from time to time. It won’t be a washout, but there could be some periods of wet weather at times.
Right now, Saturday looks to become breezy and cooler, with highs in the 50’s. Sunday will be a changeable day. A strong cold front will move through New England.
This will be accompanied by rain showers, which may actually turn to snow squalls…even in Boston! Much colder weather will be on tap for next Monday and Tuesday, with highs only in the 30’s!!
Well, that’s about it for now! In next week’s blog, I will review the spring timetable for New England. I delayed this segment this week, becacuse green up has been somewaht delayed due to the cooler weather. I also would like to write a winter review, and give myself a grade on the forecast.
In the meantime, as I like to say in the spring here in New England, two steps forward, one step back! We’ll get there…as long as we keep moving!
Thanks for reading!
Pete