Stella…STELLA!! 3/13/17
Good morning! I hope everyone had a nice, weekend! It certainly looked and felt more like the middle of January, rather than the middle of March!
After a quick moving snowstorm Friday, temperatures failed to make it above freezing since. Many record cold temperatures were eith set or tied over the weekend. And as for the wind chills, forget about it!
I feel bad for folks visiting Boston from other parts of the world, thinking that Boston might be nice and springlike during March. Well, if you were here in February, that would of been the case! In all fairness, the weather for Boston in March can be just about anything.
It was just five short years ago that many people were heading to the beach this week! Yes, March 2012 was one for the record books! How could anyone forget a full week with temperatures in the mid 80’s! Temperatures remained well above average for the rest of the month, leading to the warmest March ever recorded in Boston.
Contrast that to this past Friday, where many locations received between 2 and 4″ of snow across the Boston area. Head toward the Cape, and these amounts swelled to 6 to 9″ of wet snow. It was certainly a very snowy day indeed, down on the Cape and Islands.
Looking back now, I don’t believe I have ever seen a winter with so many twists and turns than this one! I knew it was going to be changeable, but not as extreme as this! Mother Nature has certainly kept us on our toes!
Now, I’m sure everyone is wondering who this Stella is! New girlfriend? Nope. The sister of Blanche in A Streetcar Named Desire? Why yes, of couse it was! But what the heck does this name have to do with the weather?
Well, as it turns out, a few years back, The Weather Channel actually began naming winter storms. Personally, I thought it was a silly idea. Naming hurricanes is one thing, but winter storms?
When do you make the distinction of which storm gets a name, or not? At least with hurricanes, there’s a process before a storm gets named.
One must become a tropical storm first. When a tropical depression strengthens to a tropical storm, with sustained winds of 39 mph or greater, NOAA will give the storm a name. Names are random, and go by alphabetical order.
Nevertheless, they moved forward with the idea. To their credit, many of the names have had some meaning behind them. Either Greek God’s, or Roman based.
A couple blizzards that hit Boston in recent yerars were named Nemo, in February of 2013, and Juno (my favorite) back in January 2015.
So who’s Stella? Well, Stella is the name of the next storm. And if things work out according to plan, Stella could go down in the record books as one of the largest March storms to ever hit the east coast, including New England!
If you havn’t heard, much of eastern Massachusetts, including the city of Boston is currently under a blizzard watch! Hard to believe here in mid March, the potential exists for a blizzard!
How did we arrive to this point? Well, as I was expecting, the La Nina that was destroying our winter, has faded away. In its wake, we were left with neutral ocean temperatures in the southern Pacific Ocean.
This means not warm, and not cold water. With conditions like this, winter storms can once again begin to develop along the east coast. Studies have shown, that we receive our biggest storms with either neautral, or weak El Ninos present in the Pacific Ocean.
With the La Nina fading, the jet stream is now allowed to plunge deeper into the eastern United States. As energy nears the east coast, storms can develop, and turn into nor’easters.
As it appears right now, we could be in this pattern until about the middle of April. This does not mean constant cold and snow! It just means overall, it looks colder, with more chances of stormy weather, which may include more snow at times.
I like to look at it this way. Remember all that warm, sunny weather back in October and November? Well, this is just Mother Nature’s way of balancing things out.
The trend the past several years is for late starting winters, and this is no exception. Ocean temperatures around the earth are at record high levels.
It takes longer for the oceans to cool off over the winter. But when they finally reach that critical temperature, it seems as if the pattern just snaps into winter!
So what’s the latest on Stella? Latest computer models have made some slight, but significant changes! As I explained yesterday in my update, the track of the storm is going to be critical, as to what falls from the sky.
Latest data shows a few new developments. First, they want to track the storm faster than previously thought. You may say great, we dodged a bullet! Well, not really! Computer models have also made the storm stronger!
Where this stays all snow, and especially in elevated areas north and west of Boston, this is going to be the ultimate snow blitz! The third change, and perhaps the most important, they are now tracking the storm even closer to the coast than yesterday’s guidance.
As I explained yesterday, if the storm tracks closer than what is thought, it could bring in enough warm air to mix with and possibly even change the snow to rain for a time, right in the city of Boston, and especially south of the city and along the south shore & the Cape.
This is a significant change from earlier thinking, and will be reflected in my accumulation forecast. It is important to note, some models track the storm a bit further to the southeast, over Nantucket. Should this verify, Heavy snow would continue longer, and any mixing in Boston would be brief, if at all.
Many computer models have the rain/snow line cutting right through the city of Boston. This is where one must interpret the models correctly, to decifer what’s going to happen. There are some 51 different computer models out there. Looking at all of them is useless at this point.
Many meteorologists don’t even bother with the big global models such as the European, and the American based GFS. Rather, they focus on high resolution short range models, which do a better job in the fine details, such as temperature boundaries, precipitaion, and track of storm.
So here’s my latest thinking. This is going to be a fast but very intense, storm! It will begin in many areas between 6 and 8 o’clock tomorrow morning. Snow will quickly intensify, and between 10 AM and 3 PM, it’s going to snow very heavily!
This, in conjunction with very strong winds of gusts up to 60 mph is going to bring blizzard conditions to much of our area. If you don’t need to go out at this time, please stay home!
Thundersnow is also a possibility in intense storms like this. Yesterday, I was concerned about the consistency of the snow. It now appears as if it is indeed going to be a very sticky, heavy, wet pasty snow. This raises the risk of tree damage and power outages.
Down on the Cape, you may begin as snow, but this will most likely turn to rain fairly quickly, as warm winds off the ocean invades from the east.
Because the storm is slated to pass very close, or even over the Cape, winds will be strongest early, but then calm down as the storm center tracks over the Cape.
Later on, computer models are showing a dry tongue, and milder air approaching from the south. This happens in very intense storms, as they intensify so much, dry air wraps around the south side of the comma head.
If this makes it into eastern Massachusetts, the snow will mix with sleet, and possibly even rain for a time. Winds may also slacken. Almost as if we are in the eye of the storm.
Unfortunately, if you love storms, this may be the end of the worst part of the storm. After such a wild start, this is going to feel a bit deflating.
Further inland, say to the north and west of I495, snow may continue to fall heavy at times into the evening. This is where the jackpot for the storm is going to be. I will go over these accumulations in detail shortly.
So let’s put this all together in a detailed forecast. I will rate this week a 3 out of 10. More wintery, than anything else! For the rest of today, expect mostly sunny skies, except there will be high clouds showing up later in the day. It will be cold, with highs only in the 20’s.
Watch for increasing clouds tonight, it will continue to be on the cold side, with lows in the teens and 20’s.
Tuesday will turn into a very stormy day! Look for snow to quickly develop between 6 and 8 AM across the area. By 10, everyone should be off the road, if possible.
As mentioned above, between 10 AM and 3 PM, we will experience full scale blizzard conditions in the Boston area. Excessive snowfall rates of between 2 and 4″ per hour, in combination of winds between 40 and 60 mph will create whiteout conditions, and impossible travel.
Snow plastering against trees and power lines will undoubtedly result in tree damage and power outages. During this period of intense weather, I am expecting the city of Boston to accumulate between 10 and 12″ of heavy, wet snow.
North and west of Rt 128, expect the snow to be more powdery, where 14 and 18″ will accumulate. This extends up into coastal New Hampshire, where my sister lives.
In the higher terrain snow belts of Worcester county, southern New Hampshire , and Merrimack Valley, there will be locations that receive between 18 and 24″ in a very short period of time!
Now for folks south of Boston. Similar to Boston, a period of blizzard conditions and high winds will occur. Here you can expect between 8 and 12″ of snow. During the late afternoon, a lot of sleet and rain may place a cap on the accumulations.
As you head closer to the Cape, accumulations will be less, but significant nonetheless. Expect between 4 and 8″ from southern Rhode Island, heading east to the Cape Cod canal, before a change to sleet and rain.
On the Cape itself, I’m expecting a period of snow, to change to rain, after between 2 and 4″ of wet snow.
Just a word of caution, one computer model we use is still holding on to the colder solution. If this verifies, and less mix and rain is involved, you can add between 3 and 6″ to these amounts across the Boston area. This is something I will be monitoring during the storm, and update everyone during the course of the event.
One more aspect that I would like to briefly discuss about the storm. With a full moon, and winds of up to 60 mph, the poential exists of coastal flooding. In fact, a coastal flood warning has been issued for east coast Massachusetts, between 11 AM and 3 PM.
During this period, the potential exists for at the minimum minor to moderate flooding. If the winds coincide with the high tide, there may be some areas of major flooding.
You know the areas that are flood prone…Scituate, Marshfield, Revere, Nahant, ect.. If it happened in the past, chances are it will happen tomorrow! Please listen to local authorities concerning this possibly dangerous situation.
Later tomorrow, winds will begin to diminish. In Boston, light mixed precipitation may persist into the evening, then possibly change back to areas of light snow.
To the north and west, snow will continue to fall well into the evening, adding to the accumulations. South of Boston, light rain will mix and change back to light snow for a time.
Wednesday will be an improvement. There may be some patchy areas of light snow moving through the area, but nothing too serious.
I don’t make these decisions, but I believe it would be best to keep schools closed another day to allow for proper clean up of streets and sidewalks. Especially from Boston north and west.
The weather will continue to improve for Thursday. It should be mainly sunny. It will be on the cold side, but melting will commence with the growing warm, March sun.
Friday may bring some flurries, but a storm is not anticipated. It will be cold with highs only in the 30’s.
While Saturday looks to start fair and cold, clouds will be increasing during the afternoon. It will continue to be on the cold side, with highs once again in the 30’s.
Another storm system threatens on Sunday. I actually have not had time to study the long range much this weekend. If conditions warrant, I will update my blog, or on Facebook. At this point, there is a chance of rain or snow again, how much is not known at this point.
Well, that’s about it for now! Boy, that was a boatload! Hope it was informative and not too technical for everyone! In next week’s blog, I will be talking about when this hideous pattern we’ve suddenly gotten into is going to leave! I will also try and post my spring outlook.
In the meantime, don’t blame Stella, it’s just New England weather doing what it does to torture us!
Thanks for reading,
~Be Safe!~
Pete
***Feel free to ask me any questions or leave a comment!***