All eyes will be on the US Capitol on Wednesday, not only in the United States, but across he world. Given the events at the capital on January 6th (and indeed, the tenor of the nation and world politics in recent years) there will be special attention given to an event that usually engenders a lot of headlines in normal times.
If the weather is discussed during those headlines, it will be to discuss the chill in the air during the ceremony. Temperatures in the morning will be hovering at or just below freezing, meaning that anyone around the capital before the ceremony commences better bundle up.
Mostly sunny skies and temperatures in the mid to upper 30s should be in the offing when Kamala Harris, followed by Joe Biden are sworn into their new roles atop the United States government.
There will be a bit of northwest flow thanks to an inverted trough trailing low pressure in the Canadian Maritimes. This may lead to a bit of briskness, but any associated precipitation will remain in the Appalachians west of D.C. Of all the many things that could happen on Wednesday, weather is not something that should raise too many concerns.
Who could have predicted all that happened in 2020? If anyone could have predicted it, I’m sure a lot of people would have chosen to skip it. A dark December ended brightly, at least in terms of plaudits for The Weather Channel and Accuweather, who tied atop of the leaderboard for forecasters of the month.
It didn’t help put them over the top for forecaster of the year, however. That prize belonged to…. us! Victoria-Weather was he most consistent throughout the year, and ended up with the best scores on aggregate (TWC and AW were 2 and 3, respectively) for the year. Interestingly, The Weather Channel was very good when they were good, but had some stinkers mixed in. They had he most individual forecast wins for 2020, while Accuweather was never at the paramount, but never really had major rough streaks, and are at the bottom of this table.
The Weather Channel
National Weather Service
Victoria-Weather was consistent, and had moments of brilliance as well. Just the way we want it. To 2021, hopefully it goes better than 2020.
As is often the cast with mid-winter systems, a deep upper level trough will feature two iterations. The first will be a fast moving area of low pressure moving through the upper Midwest with a burst of snow in the Upper Midwest and Great Lakes. The second will emerge as the base of the upper trough pivots further south into warmer air, a stronger feature will develop.
In this case, the deep, secondary low will really emerge over east Texas. Tightly wound and with the clash of air masses one needs to generate some convection.
The storm will quickly shift to the northeast and get more organized as it does so, introducing a threat for severe weather in the Lower Mississippi Valley as it does so.
Here is the risk for severe weather on New Years Day, or Day 4 in the SPC parlance.
If there is one good thing about the timing of these storms, it is that their intensity will require day time heating, and overnight severe weather is not expected. Still, as the storm continues to lift to the north-northeast, severe weather is already on the agenda for January 2nd as well.
The back end of the storm isn’t going to be nearly as moisture rich as the warm sector, in good spring fashion, but there will still be snow associated with the feature, particularly through the Great Lakes.
2020 is finally almost over, but 2021 really wants to give us it’s best shot right out of the gate.
I’m going to be pretty quick with the forecaster of the month: It was WeatherNation. They don’t get many titles so it’s too bad we don’t get to spend too much time discussing it. Residents of the mid Atlantic, particularly in downstate New York might be particularly miffed that we don’t get a chance to really dive into WeatherNation’s month.
Starting early tomorrow afternoon, a mix of rain and snow, depending on how near the coast you live, will start in Long Island and southern New York (sooner in the DC and Philadelphia areas) and intensify into the evening, until we can look at something like this after sunset through midnight.
Precipitation from the Big Apple northward is likely to be snow, while Long Island may see quite a bit of mixed snow, sleet and rain. Where it is all snow, including in New York, over a foot of accumulation is in the forecast.
Long Island doesn’t necessarily get the best of the weather however. In addition to whatever sloppy accumulations they get in Long Island, residents of the area can also look forward to wind gusts approaching 50mph. What’s worse? That’s a matter of personal opinion.
It will still be over a week, but this gives the mid-Atlantic a good shot at a White Christmas.
As a lot of people south and west of a line from Virginia Beach to Toledo can tell you, it’s raining in buckets out there. At least it is happening at the end of the long Holiday weekend, and surely sets the mood for a lot of us as we log back into work on Monday.
The satellite imagery belies the prolific nature of the rain. There isn’t much apparent rotation, no puffs of cumulonimbus across most of the band of clouds, with only a few apparent thunderstorms in the Florida Panhandle.
Now that I’ve warned you, perhaps you looked a little more closely, and found the circulation futher to the west of the erupting thunderstorms and swath of white clouds running from the Mid-Atlantic to north Florida.
Indeed, the bulk of the rain so far is the result of warm frontal passage over the undulating Appalachian terrain. That boundary currently runs from eastern Kentucky through eastern North Carolina, has proven to be quite rainy. The warm sector south of the boundary and ahead of the cold front, which is setting off thunderstorms through the Panhandle, is also rife with showers and a few rumbles of thunder.
Perhaps the most winter like element to this storm imagery is the glut of water on the back side of the center of circulation, which is around Florence, Alabama. Usually, temperatures don’t allow for much condensation on the inverted trough during the summer, let alone torrential rain. Temperatures are chilly aloft, and this feature is pulling in more cold air into it. Not enough for snow in southern Indiana, but getting colder.
This feature has a great deal of support at the upper levels, an will continue to wind up. Away from the moisture rich southeast, and interference of the Appalachians, the cold front will become more evident, but by that time, the warm sector will be off shore. The low itself will barrel north, just like a winter nor’easter. It will have the wind of a nor’easter, and by the time the storm has shifted out of the Mid-Atlantic by Tuesday morning, Lake effect snow is anticipated for the eastern Great Lakes.
The heavy rain, along with some gusty wind and a rogue rumble of thunder will continue in coastal New England on Tuesday, but should shift off shore before Wednesday rolls around. This feature looks like a winter storm in the models, and a little bit on satellite and radar. It will almost feel like it, too.
This weekend has been pretty nice across the country, with little in the way of watches or warnings or intrusions of cold air or wet weather. Unfortunately, it is only late November, and winter is not yet cancelled.
In fact, there maybe a couple of features that bring wet weather and less pleasant conditions to the country this week. First, early this week a feature will come out of the Rockies and move into the Plains, bringing rain, snow and cooler air to the middle of the country.
The feature will shift towards the Great Lakes, with showers and thunderstorms south from the Ohio River, and a real possibility of lake enhanced snow mid week before shifting out through New England late in the week.
A couple of other surges of wet weather will be possible with a feature arriving in the Pacific Northwest on Tuesday, which might lead to some significant problems in the mountains for casual travelers, but probably not those that are used to it.
Late in the week, a system will develop in the Lower Mississippi Valley with cold air driving in from the northwest. It will predominantly be a rain maker, initially in Mississippi and Louisiana, but shifting northeast before clobbering the Ohio Valley again, and eventually the entirety of the Eastern Seaboard. Again, it should all be rain at least through next Sunday, with some thunder further south.
Now, as for the beginning of December. A developing area of low pressure in the mid-Atlantic might make things a bit more wintry. But we’ll talk about that again at a different time.
One aspect of emerging media and is the rapid dispersal of terms that come up in the news. Some things have always been there, and just get out of hand when they enter the news cycle. Things like “bomb cyclone” seem absurd to the point of frivolity if you don’t know the definition. I’ve gotten into debates on Twitter about Particularly Dangerous Situations being assigned to some weather watches, because the other Twitter user thought meteorologists were being overdramatic in their terminology. It’s a lesson in never using Social Media.
One term that really exploded in the last half decade was “Polar Vortex” which emerged in the midst of a persistent cold snap that was particularly cruel to the Eastern Seaboard. Since the East Coast is where most media, and really most of the people in the country reside, the term was foisted upon the country. There were some amusing consequences.
But mostly, it just annoyed meteorologists, because the colloquial definition of the polar vortex is not correct. As the media may have led some to believe, the polar vortex is not just a surge of cold air that dive bombs the mid latitudes out of the Arctic.
A vortex is something that rotates, The Polar Vortex, then, is the Arctic jet that spins around the North Pole. Ergo when it is strong, as is the case with all jet streams and streaks, it represents a sharp temperature contrast on other side of the streak. While it will certainly be cold north of, or within the vortex, it’s strength suggests that it will actually be fairly warm south of it.
Weaker flow can lead to some ripples in the jet, which can mean lobes of cold air pressing further south, particularly later in the year when high latitudes start to get colder on their own. Right now, though, it looks like we have a stout Polar Vortex to guide us into winter, and that is a good thing.
2020 has now surpassed 2005 as the most active tropical season in the North Atlantic in recorded history. We’ve exceeded the total of named storms by two, dipping further into the Greek alphabet than ever before. The long lived Eta has made the most of it’s first appearance in our meteorological lexicon, while Theta is spiraling out by the Azores, and Iota is preparing to landfall in Central America, near where Eta initially exploded on the scene. Similarly, Iota is expected to become a hurricane, with the present forecast asserting that Iota will be a major hurricane upon besetting the Nicaragua/Honduras border with more destruction.
Fortunately, despite all the action this year, we haven’t matched the pace of hurricanes or major hurricanes of 2005, which still holds the record in both categories. A bit of good news is that, at least for the next couple of weeks, it doesn’t look like Iota has a follow up on the immediate horizon, which will make it difficult to reach the hurricane or major hurricane numbers of 15 years ago.
Of course, I say that now, but it should be noted that the Tropical Storm Zeta of 2005, the last storm of that busy year was also the first storm of 2006. In a year like this, there is plenty of time for more new ground to be covered.
Today was a particularly active weather day, with low pressure in the Upper Midwest extending a cold front through the Great Lakes and on towards the Mississippi. The front itself has been the origin of severe weather from the Quad Cities south through Missouri and eventually across Big Muddy and through Illinois.
More indicative of what’s coming is the snow that fell in the Upper Midwest. 2-5″ fell in Minnesota as precipitation wrapped into the cold air diving into the country behind this system, merely a couple of hundred miles away from tornado warnings in northern Illinois.
More tangibly, I think these two images spell out the change coming for the end of the week. First, the radar imagery.
And now, take a look at tonight’s lows. There should be some significantly colder air northwest of those bands of thunderstorms.
And there is that sharp drop I promised. High pressure will move in at the surface over the Plains, and prevent much of a warm up for a couple of days. Eta will slow the cold front so all those places that will get copious rain from the tropics will remain warm few days longer.
If you didn’t believe it yet, winter looks like it is here, and will hang on.
We are only a week into November, which means that we are awarding the forecaster of the month sooner than usual lately, and also, with as long as this week took, it’s clear time has no meaning anymore. The forecasting was pretty ok this month, though it leaned heavily on model guidance because of a west coast bias. It was Accuweather who did the best work for the month.