Winter Interlude…1/16/23
Hello! Happy Martin Luther King Jr. Day! I hope everyone is enjoying their long holiday weekend! For a change, it’s been a bit on the wintry side for a better part of the holiday weekend. Friday continued the spring madness, with temperatures approaching 60 degrees with scattered rain showers. A subtle cold front slipped through the region Friday night, dropping temperatures back to seasonal levels overnight Friday. Many were surprised to see a period of light sleet mixed with snow early Saturday morning. Gray skies and northeast winds kept the rest of Saturday feeling more like winter. Another batch of light snow arrived later Saturday and continued into early evening as temperatures continued to cool. A slowly evolving ocean storm continued the wintry theme on Sunday, with snow falling on the Cape, which eventually pushed westward arriving in Boston by late afternoon. Occasional light snow fell in Boston overnight Sunday, while steady accumulating snow fell on Boston’s north and south shore where many communities received between 3 and 6″ of snow. Snow picked up in Boston early Monday morning, and fell heavily for a time, when the city received 3.4″ of snow for their largest snowfall of the winter season thus far!
Indeed, it was a bit of excitement for weather enthusiasts and snow lovers in an otherwise non-eventful winter up to this point. Believe me, it took everything in Mother Nature’s power to produce the light snowfall. Call this brief winter interlude an island of cool in a sea of warmth! In a very unusual pattern, cold air drained from the Canadian Maritimes down the Maine coast and into eastern Massachusetts. At the same time, a rather intense storm developed well off the southeast New England coast, which actually had sub-tropical features to it and developed an eye! This does not surprise me, as ocean temperatures continue to well above average off our coast for this time of year. Had this storm tracked a couple hundred miles closer to the coast, this could of been a real nasty winter storm for much of eastern Ma. As it was, the main brunt of the storm tracked north into Nova Scotia yesterday, bringing a crippling ice storm to our Canadian neighbors to our northeast. This ice storm is now retrograding westward and now affecting a good portion of Maine.
You may ask, how can it be freezing rain in Canada and Maine, and snowing in Boston? This is a very good question, and is quite a complex weather set up! Every so often the jet stream slows down, and is blocked from steering storms away from New England. This storm broke off from the main jet stream and has been meandering off the coast for days. A blocking ridge of high pressure prevented it from escaping to the east as it normally would do. As the storm began to intensify, it pinwheeled moisture and mild maritime air from the Atlantic Ocean northward into Nova Scotia, then westward into Maine. As the air descended into eastern Ma. it was just cold enough to fall in the form of snow across the area. Had the storm stuck around any longer, I believe milder air would of retrograted from Maine down through eastern Ma. possibly turning the snow over to freezing rain. That would of made for a mess!
With our first real taste of wintry weather this year, some have been asking me if this is the beginning of some kind of snow blitz for Boston? Remember, the epic winter of 2015 didn’t begin in earnest until January 24th back in 2015. We never know for sure, but for this winter, I would have to say no snow blitz is imminent for Boston. This is a completely different winter and weather patterns. For one, we are in a La Nina this year. That year we experienced a very active sub-tropical jet stream in a weak El Nino, coupled with a very warm pool of water in the Gulf of Alaska and northeast Pacific Ocean. This led to blocking patterns which in the Pacific Northwest, and allowed for arctic air to filter down into New England from Greenland. All these ingredients came together perfectly to produce record heavy snows here in Boston that winter.
While I’m not forecasting an epic snow blitz, it’s not out of the question we see a wintry recovery after such a paltry beginning to winter here in New England. In terms of winter, it’s still quite early in the season. One wildcard I mentioned early in the season to keep an eye on the sudden weakening of La Nina. Depending on when this occurs it could have a significant impact on our weather patterns heading into late winter and early spring. So despite having a mild winter so far, we still could experience a rough stretch of wintry weather sometime in February and especially March this year. While I’m still anticipating below average snow for Boston this winter, it may be enough in the end to forget the miserable start we had.
Looking over some computer data this morning, it appears the active pattern will be continuing for the foreseeable future. While major snowstorms are not anticipated here in Boston, the same can’t be said for interior New England, especially the ski resorts. So far, the mountains have received very little snow this winter, and has been plagued with warm rainstorms followed by cold dry air resulting in icy conditions.
Latest computer model guidance is indicating an increasingly active subtropical jet stream. At the same time, cold air will begin pressing south from southern Canada. While all this is happening, a persistent southeast ridge of high pressure will continue to influence the weather patterns in the Mid-Atlantic region extending up the I95 corridor into Boston. As storms form in the Tennessee Valley, they will begin to track towards New England. If the storms tracked south of New England, Boston would be in play for wintry precipitation. However, many of these storms look like they want to track inland, across southern New England, then off the Maine coast. A track like this would be a skiers delight, with heavy snowfalls for the mountains of Vermont, New Hampshire and much of western Maine! As I mentioned in previous posts, do not give up on ski season in northern New England this winter! It appears the best is yet to come!
While it’s looking like mainly rain and mixed precipitation events for now in Boston, it’s not out of the question one of these storms tracks a little further south than computer models are showing. If this happens, even Boston could experience a decent snowfall or two. At the very least, we must be on guard for a freezing rain or sleet event if any of these storms track just south of New England. While hard pressed to happen here this January, we may see something like this happen more likely during February. In the same thought, La Nina may have one more trick up her sleeve, sending Boston a final farewell gift of well above normal temperatures this coming February. It’s a bit of a catch 22. February is typically the warmest month in La Nina years. Yet at the same time, La Nina will be beginning to rapidly weaken. It’s a bit too early to tell from right now, but I can say both outcomes are on the table!
As mentioned earlier, ski resorts have been struggling to maintain snow on the slopes this winter. While snow-making has dramatically improved over the years, there’s nothing like natural snow! I will give skiing this week a 7 out of 10. It’s cold enough to make snow at night, and some natural snow may be on the way by the end of the week. As has been the pattern, the ocean storm missed most of the ski resorts past couple of days. The next opportunity for snow will arrive later Thursday into Friday. Before that, a small disturbances may result in some fresh snow across northern ski resorts on Wednesday. A stronger storm will approach the region later Thursday and continue into most of Friday. Rain or rain or snow mix will be arriving across southern zones later Thursday. As this storm tracks across southern New England, it should intensify and draw enough cold air into the system to change any mixed precipitation to snow. Snow should fall heavy at times Thursday night into Friday, before slowly tapering off by later Friday, but some snow showers could even linger into much of Saturday! Right now, it looks like a general 6 to 12″ snowstorm, but favored resorts may easily end up with well over a foot of snow. Jackpot zones look to be the Green Mountains of Vermont, White Mountains of New Hampshire and ski resorts in western Maine. Just in time for weekend activities!
Before I get to the forecast, I did want to mention that the siege of severe storms which battered the beautiful state of California appear to be ending for the time being. There may be one more storm on Wednesday before an extended period of dry and tranquil weather arrives most likely for the rest of January. Wow, and what a barrage of storms it was. Trillions of gallons of water fell, and well over 10 ft of snow fell in the mountains, catastrophic flooding and mudslides. Tragically, my cousin lost her horse ranch to the flooding. Thank goodness nobody was injured, and all the horses were saved. They needed the water, but was it too much all it once? What a terrible price to pay.
Now for your weekly outdoor winter activity forecast. I will give this week a 6 out of 10. Watch for any lingering snow flurries to be coming to an end this evening. There still appears to be quite a bit of cloudiness spinning around the storm out in the ocean, so I’m not expecting any rapid clearing overnight. One thing to note, as sunset approaches, temperatures are expected to drop into the 20’s. Therefore, any slush that’s hanging around may freeze and create icy patches.
I’m expecting fairly tranquil conditions for the period of Tuesday through the first half of Thursday this week. A few weak disturbances will be tracking across New England bringing considerable cloudiness and a slight chance of some scattered showers on Wednesday. Otherwise, Tuesday may begin with some sun, but turn mostly cloudy during the afternoon hours. Temperatures will be above average this week, mostly with highs in the 40’s, and lows in the 20’s and 30’s, so the snow that fell today will most likely be gone by the end of Wednesday.
Watch for a stronger storm to approach the region later Thursday. As the storm arrives, it may be just cold enough for a brief period of snow or sleet, this is especially true for locations north and west of Rt 128, and most especially I495. If any snow or sleet falls in Boston it would be very brief, as rain takes over for areas east of I95 along the coast. However, as mentioned above, as soon as you cross the boarder into the interior of New Hampshire, it may be a different story, where you may encounter accumulating wet snow, 10 miles inland from the coast. Even areas north and west of I95 in Massachusetts may continue to see some wet snow overnight, particularly north and west of I495. Heaviest accumulations will be in the higher terrain and ski resorts, but even lower elevations may need to break out the plows. As the storm pulls east of Boston on Friday, there’s a chance enough cold air slips back towards the coast, changing any remaining moisture to light snow even in the city. I’m not expecting any significant accumulations inside of I95 with this storm. Possibly up to one inch if enough moisture is left over on Friday. I will monitor the storm just in case there are any changes, and will send an update on social media if conditions warrant.
Look for improving weather conditions this weekend with a continuation of mild temperatures here in southern New England. It will be colder up north. After the fresh snowfall it would be a great weekend to head to resorts for outdoor winter activities!
Well, that’s about it for now! If time permits, I will post a new blog a week from today. However, there’s still a chance I won’t be able to post until Monday the 27th. If any threatening weather is imminent, I will be sure to update everyone. When I do post next, I will have my outlook for the second half of winter! I will also have your new ski and outdoor winter activity forecast. In the meantime, what would winter be without a interlude or two!
Be safe & thanks for reading!
Pete