Weekly Outlook

Weekly Outlook: October 31-November 6, 2016

There’s nothing spooky about the forecast this week. Most of the week will be a treat, with very little in the way of tricks.OK, now that we’ve got the requisite back Halloween puns out of the way, we can get to the actual forecast.

High pressure will keep the region dry today and Tuesday. A weak system passes by to the north Tuesday night and Wednesday, bringing in some clouds, but it doesn’t look like we’ll see any precipitation.While we’ll be cool today and tomorrow, we will start to warm up on Wednesday. While Thursday will also be warm, we’ll be dealing with rain by afternoon as a cold front approaches the region. The rain will continue into Thursday night, but be gone by the time you wake up Friday morning. High pressure returns for Friday and Saturday with cool conditions returning. Another weak system comes through on Sunday, with some additional showers expected.

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At least one model thinks we’re in for a good dose of rainfall Thursday afternoon and evening. Image provided by WeatherBell.

Considering how bad things can get around here for Halloween, this week’s forecast isn’t that bad. Just 4 years ago, we were cleaning up after Sandy. Just one year earlier, we were digging out from a record blizzard. Also, 25 years ago, the so-called “Perfect Storm” was battering the region.

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Snowfall from the Halloween Snowstorm of 2011. Image provided by NOAA.

Monday: Becoming mostly sunny and breezy. High 45-52.

Monday night: Mostly clear skies. Low 28-35.

Tuesday: Sunshine and a few clouds. High 50-57.

Tuesday night: Partly cloudy. Low 38-45.

Wednesday: Intervals of clouds and sunshine. High 61-68.

Thursday: Cloudy and breezy with rain likely in the afternoon and evening. High 63-70.

Friday: Partly to mostly sunny. High 46-53.

Saturday: A mix of sun and clouds. High 47-54.

Sunday: Mostly cloudy with a chance for a few showers. High 45-52.

 

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Heavy Rain/Snow, Winter Weather

Snow in the Forecast? Not for Most of Us

By now, you’ve probably heard from your favorite TV meteorologist that there’s snow in the forecast for Thursday. While parts of the region will likely see some snow on Thursday, the vast majority of us will not.

High pressure will provide us with some chilly weather for the next few days. Temperatures will likely dip near or below freezing across much of the area tonight and again Wednesday night. So, we’ve got cold air in place, and a storm system heading our way on Thursday. That means it’s going to snow, right? As famed college football analyst Lee Corso would say “Not so fast my friend”. Allow us to explain.

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Thursday morning will start off with temperatures below freezing across much of the region. Image provided by WeatherBell.

As that high pressure area moves off to the east, winds will shift into the east and southeast across the region. Water temperatures off the coast are still in the 50s to lower 60s, so a wind off the water will allow temperatures to moderate. Thursday will still be a chilly day, with temperatures mainly in the 40s, but the air will remain dry, thanks to the high pressure area. As the precipitation arrives from the west during the afternoon, it will fall into that dry air, evaporating before it hits the ground. This will also allow temperatures to drop through a process called evaporational cooling. Temperatures may drop into the upper 30s to lower 40s before the air moistens up enough for the precipitation to hit the ground.

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GFS model forecast for rainfall through Friday afternoon. Image provided by Pivotal Weather.

With temperatures likely near or just above 40, we’re looking at mainly rain across most of our region. Oh sure, there could be a renegade snowflake or ice pellet mixed in at the start across parts of southern NH or central MA, but for the most part, we’re looking at rain, and possibly a decent amount of it. Much of the region could receive between 0.75″ and 1.50″ of rain from this system, which will help put a dent into the ongoing drought.

Farther to the north and west, especially across the higher elevations of the Berkshires, Monadnocks, and the mountains of Northern New England, temperatures will be cooler, and the precipitation will arrive faster, thus increasing the chances that it starts as snow. Even in these locations, warmer air will move in Thursday night, allowing the snow to change over to rain. Before that happens, we could see a little accumulation, especially at the higher elevations, where a few inches may accumulate. The best chance for accumulating snow actually looks to be across the Adirondacks of northeastern New York, where the warm air will have a tough time getting in.

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Snowfall forecast from the GFS through Friday morning. Image provided by WeatherBell.

Once we get past this system, we could be looking at a wet weekend and start of next week. A couple more storms may move across the region, bringing us several bouts of much-needed rainfall. It does not look like there will be more snow with these systems, except possibly across the mountains of northern New England.

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Weekly Outlook

Weekly Outlook: October 24-30, 2016

In the past several days, we’ve had 80-degree temperatures setting record highs, torrential downpours leading to flooding, several inches of snow across the higher elevations, and wind gusts to 60 mph across the region. Believe it or not, there’s a technical term for all of this: “October” While we’re still in October, things will be a lot less volatile during the upcoming week.

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Parts of Northern New England received several inches of snow Saturday night, especially at the higher elevations. Image provided by NOAA.

We’ll start the week off with a little bit of rain as a weak system moves across the region. The rain will be mainly confined to areas south of the Mass Pike, and should be all done before many of you get to work Monday morning. It will remain windy into Tuesday as the storm that brought us the heavy rain Friday continues to sit and spin across southeastern Canada. High pressure then builds in, giving us dry but rather cool conditions for mid-week.The next system gives us some rain Thursday into early Friday. While there could be some downpours, we’re not looking at anything like what we saw Friday night. High pressure then builds in for the weekend, but another storm looks to approach late Sunday night and into Halloween. Right now, it looks like the rain will be out of here in time for trick-or-treaters, but we’ve got plenty of time to keep an eye on that system.

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On average, high temperatures should be in the upper 50s to near around here in late October. Much of the upcoming week will see highs 10-15 degrees below normal. Image provided by WeatherBell.

Monday: Showers in the morning, then becoming partly sunny and windy in the afternoon. High 52-59.

Monday night: Clear to partly cloudy and breezy. Low 32-39.

Tuesday: Partly to mostly sunny, still breezy. High 43-50.

Tuesday night: Clear skies. Low 29-36.

Wednesday: Sunshine and a few clouds. High 41-48.

Thursday: Becoming mostly cloudy with showers developing late in the day, becoming a steady rain at night. High 46-53.

Friday: Rain ending in the morning, then becoming partly sunny and breezy. High 53-60.

Saturday: Mostly sunny. High 50-57.

Sunday: Becoming mostly cloudy with showers developing at night. High 48-55.

Finally, since we’re getting to the time of year where people start wondering when the snow will start to fall around here, we figured we’d try to answer that. Now, we understand that some of you ask this question because you love winter, and some ask because you dread it and want to know when your luck will run out. There’s a model called the CFS, that actually goes out several months. We put zero stock in this model, and are only presenting it for entertainment purposes only. In other words, the odds that this model is right are roughly the same odds that the Cubs win the World Series the Jets win the Super Bowl this year.

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CFS model forecast for Sunday evening November 20, showing the first snowfall for Southern New England. We’re just showing you what the model has, not that we believe it. Image provided by Pivotal Weather.

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Extreme Temperatures, Heavy Rain/Snow, Winter Weather

A Little Bit of Everything – October in the Northeast

October can be a time of change in the Northeast. While the first thing that comes to mind is the changing colors of the foliage across the region, the weather also changes, sometimes quite frequently. That’s what we’re going to be dealing with for the next few days.

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Current temperatures across the Northeast as of 1pm on October 19. Image provided by WeatherBell.

 

It’s an unseasonably warm afternoon across much of the Northeast, with temperatures generally in the 60s and 70s, with 80s from southern Connecticut into the Mid-Atlantic states. Dozens of record highs have been set over the past few days, and more are falling today. However, some changes are coming, and the warm weather will be a distant memory within the next 24-48 hours.

A cold front is moving across the region this afternoon, though you really couldn’t tell, as there’s only scattered cloud cover and little precipitation with the front. That front will stall out to the south of New England tonight. On Thursday, a wave of low pressure will start to approach from the west. This will spread rain and showers into the region. Some of the rain will be heavy, especially from New York into Pennsylvania late Thursday into Friday. With rainfall totals of 1-3 inches and locally up to 5 inches expected, some flooding is likely. Across New England, where a serious drought is ongoing, rainfall will be much lighter, with most locations likely receiving under half an inch of rain.

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Expected rainfall through Friday evening across the Northeast. Image provided by Pivotal Weather.

 

As that wave of low pressure moves into Upstate New York on Friday, it will lift that cold front back across New England as a warm front. While Friday won’t be as warm as today, temperatures will still get into the 60s and lower 70s across much of New England. With dewpoints also in the 60s, it will be a rather muggy day for mid-October.

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Computer model forecasts for the track of a tropical disturbance in the Bahamas. Image provided by Tropical Tidbits.

 

Meanwhile, there is a tropical disturbance brewing in the Bahamas right now. While conditions are favorable for development, we’re not looking at another monster like Matthew, it could become a tropical depression or subtropical storm over the next few days. The system will likely head northward, moving towards the Gulf of Maine as we head into the weekend. This will bring another round of heavy rainfall into Maine and Atlantic Canada, again missing most of Southern New England, where the rain is most needed.

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Expected rainfall between Friday morning and Sunday morning across the Northeast. Image provided by Pivotal Weather.

 

Once the system moves into southeastern Canada, it is expected to stall out under an upper-level low pressure area and become a strong extratropical system. It will drag a cold front across the Northeast, bringing much colder air into the region. With strong low pressure nearby and much colder air filtering in, rain will change over to snow across portions of Upstate New York and Northern New England. While the snow will be confined mainly to the higher elevations, this is the first accumulating snow of the season across the area. Several inches may accumulate across parts of the Adirondacks and the Green Mountains.

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Expected snowfall through Sunday evening across the Northeast. Image provided by WeatherBell.

 

While there could be a few wet flakes mixed in with some of the rain across lower elevations of Central New England, accumulating snow is not expected.Sunday will be a chilly day, with highs only in the 40s and 50s across much of the Northeast. These readings are 10-20 degrees below normal. Of course, any mention of snow in October across the Northeast will make residents think back just a few years to the pre-Halloween snowstorm that dropped 1-2 feet of snow across parts of the region, setting numerous records. While this system won’t come anywhere close to that, it should make for some spectacular photos of snow-capped mountains and valleys filled with colorful foliage early next week.

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Snowfall from the Halloween snowstorm of 2011. Image provided by NOAA.

 

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Weekly Outlook

Weekly Outlook October 17-23, 2016

As you can probably guess from the video above, we’ve got some changes coming this week. A weak cold front will drop down into the region today, with just a chance for a few showers as it moves through. That front will lift back northward as a warm front as we head into Tuesday, bringing us some Indian Summer weather for midweek. The front may take its time heading northward, so the warmer air may not reach the Seacoast of New Hampshire until late in the day. Once that warmer air settles in, we could even set some record highs, especially on Wednesday. A cold front moves through late Wednesday, bringing some cooler conditions in for Thursday, but little rainfall.

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Some record high temperatures are possible on Wednesday across the area. Image provided by WeatherBell.

But wait, things change again after that! That cold front stalls out to our south, and a wave of low pressure rides along it. At the same time, an area of low pressure may try to move up the East Coast. As a result, Friday could be a rather wet day. How much rain we get depends on where the front is located and how close the coastal low comes to New England. It appears as though the front may lift back northward again as warm front, which would mean another mild day, but also focus most of the rain across northern New England.

That’s not all though, as there are even more changes next weekend! The coastal low pulls away from the region and the cold front moves well offshore, with high pressure starting to settle in. That will bring much colder air into the region by Sunday, despite some sunshine. How cold? There might even be some snow showers across the higher elevations of northern New England. That chilly air likely hangs around into the first part of the next week.

Monday: A mix of sun and clouds, slight chance for a shower. High 70-77.

Monday Night: Partly to mostly cloudy. Low 52-59.

Tuesday: Partly to mostly sunny and becoming breezy. High 75-82, though it could stay cooler along the NH Seacoast and possibly the North Shore.

Tuesday Night: Clear skies, breezy. Low 59-66.

Wednesday: Sunshine and a few clouds. High 75-82.

Thursday: Plenty of clouds, slight chance for a few showers late in the day. High 63-70.

Friday: Mostly cloudy with showers likely. High 63-70.

Saturday: More clouds than sunshine, more showers possible, mainly in the morning, becoming breezy. High 57-64.

Sunday: Sunshine and some afternoon clouds, breezy. High 54-61.

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Weekly Outlook

Weekly Outlook October 10-16, 2016

We finally got the beneficial rain we that we really needed on Sunday. Of course, we need a lot more of it. This week, we’re not going to get it. So while you won’t need an umbrella, you will need to dig out your fall coats and/or sweatshirts, because it’s going to turn cooler.

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Satellite loop showing the moisture from what’s left of Matthew streaming into Atlantic Canada early this morning while Nicole starts to strengthen south of Bermuda. Loop provided by NOAA.

A cold front will continue to pull away from the region today and high pressure will build in. This will result in dry and cool conditions into at least Wednesday. By Thursday, we’ll be back in a somewhat similar pattern to what we had on Sunday. A cold front will be approaching from the west, and Hurricane Nicole will be well offshore after making a close pass to Bermuda. Unlike Sunday, Nicole should be too far offshore to have any influence on our weather, so we’ll just have to deal with scattered showers with the cold frontal passage. High pressure then builds back in for next Friday and the weekend with a return to cool and dry conditions. While we still could see some days with highs in the 70s coming up, it is becoming less and less likely that we’ll see highs reaching 80 again before March or April. It could be worse though, at least we don’t have snow in the forecast…..yet.

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The first snowstorm of the season is expected across the Northern Rockies today and Tuesday. We don’t have to worry about snow yet. Image provided by WeatherBell.

 

Monday: Becoming mostly sunny and cool with diminishing winds. High 55-62.

Monday night: Clear skies. Low 34-41, with some frost likely in the normally colder locations.

Tuesday: Sunshine and a few clouds. High 58-65.

Tuesday night: Clear to partly cloudy. Low 40-47.

Wednesday: Partly to mostly sunny. High 60-67.

Thursday: Becoming partly to mostly cloudy with a chance of late-day showers. High 64-71.

Friday: Partly to mostly sunny, breezy, and cooler. High 55-62.

Saturday: A mix of sun and clouds. High 52-59.

Sunday: Mostly sunny. High 56-63.

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Tropical Weather

Is Matthew About to Get Loopy?

“Just when they think they got the answers, I change the questions!” – Roddy Piper

 

At this time yesterday, we were gaining more and more confidence in our forecast for Matthew. Then the midday models started rolling in, and we started scratching our heads. Instead of coming close to Florida and then heading up the coast, passing south and east of New England, the models started doing some wacky things. First, one of them had it menace the Southeast, then do a big loop back into the Bahamas before hitting Florida again in a much-weakened state. Then, another model did something similar. “It’s just two outliers” is what we thought, the rest still bring it up the coast. We were still fairly confident in our forecast. Then, the GFS model came out around midnight:

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GFS model forecast loop from early Wednesday morning, October 5. Loop provided by Tropical Tidbits.

At that point, our forecast went right out the window.What seemed like an anomaly from one or two models, was quickly becoming the consensus. The GFS model, which had been very consistent with a track up the East Coast, suddenly changed gears, and had Matthew threaten Florida and the Bahamas not once, but twice. Oh, it still brought Matthew up the coast, bringing rain and gusty winds to parts of New England for the weekend, but now it was doing it NEXT weekend, not this weekend.

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Model forecasts for the track of Hurricane Matthew from midday October 5. Image provided by the University of Wisconsin.

Not all of the models are showing this loop, but as you can see in the image above, there are several that do now. Before we get into what we think might happen, we’ll get into what is causing this peculiar forecast. Looking at the upper atmosphere this morning, we see a trough of low pressure across much of the West, and a ridge of high pressure in the East. There’s also a pretty strong jet stream moving into the West Coast and into the Rockies, before it makes a sharp left turn in the Mississippi Valley.

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Upper-air analysis for 300mb (approximately 30,000 feet) from 8am on October 5. Image provided by the National Center for Atmospheric Research.

As this trough of low pressure moves eastward, the models had been projecting that it would strengthen and sharpen up, in effect “capturing” Matthew as the trough neared the East Coast. The southerly winds ahead of the trough would drive Matthew northward or northeastward, and bring it up the coast. Instead, the models are now showing that this trough will actually weaken as it moves eastward, and flatten out. As a result, high pressure will build back in, blocking Matthew from moving northward. This would turn Matthew back towards the south and let it mill around in the Bahamas. Not all of the models are showing this scenario. Some still have the trough just strong enough to draw Matthew northward enough that the westerly winds of the jet stream are able to push it out to sea once it gets up towards the Carolinas.

This leads us to more questions, which is where the quote at the top of the post comes in.If Matthew does not get pulled north and head out to sea, then what does its future hold? Some models have it loop around, back into the Bahamas, then back towards Florida before turning northeast and heading up the coast again next week. Another one sends it back into Florida as a much weaker tropical storm, then across the state and into the Gulf of Mexico where it eventually weakens and dissipates. At this point, we’re back to “wait and see” mode.

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Radar loop from Camaguey, Cuba showing the eye of Hurricane Matthew. Image provided by Instituto de Meteorología de la Republica de Cuba

What we do know is this: There are hurricane warnings in effect for much of Florida and the Bahamas. Hurricane Matthew is still a Category 3 storm with top winds near 120 mph this afternoon. It is going to move through the Bahamas over the next 24 hours, and then come dangerously close to the Atlantic coast of Florida, with landfall a possibility, but not definite. It will likely head northward, bringing gusty winds and heavy rain to much of eastern Florida, southeastern Georgia, South Carolina, and southeastern North Carolina over the next few days. After that? That’s a really good question that we just can’t answer right now.

 

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