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OT: Stormy and Potentially Snowy from about 2/8-2/22? (pg 9); OG Thread: Cold and Potentially Snowy Pattern Likely for Most of January

Nice article, thanks. I've known David Robinson for over 20 years as I met him at an RU event and we started chatting about weather. We were just emailing the other day about some errors I found in their New Brunswick annual snowfall totals on their NJ Climatology page. Very nice guy and a huge RU sports fan who goes to a lot of games.
Ha, I figured you might know him. Cool that he's an RU sports fan!

I remember reading Mt. Baker's 1,140 in record years ago, which is also the world record afaik, thinking I'd never see anything remotely close. But two years ago when UT broke snowfall records all over, was looking like an outside chance for a bit. Topped out just over 900 inches at Alta.

Always wondered if there are mountains deep in the Himalayas, AK or somewhere that have gotten even more than the 1,140 but without anyone to record it.
 
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So, the cold and potentially snowy pattern has delivered on the cold for the eastern US and the snow, at least for the south and mid-Atlantic, but obviously not for most of our area (except far SNJ), but that might just change soon. With regard to the pattern, it looks to reload more cold weather for most of this week after seasonable days from now through Monday and then things look like they'll become more active with regard to storms with a few potential winter storms possibly coming next weekend through about 1/24. Beyond that it's looking like late January could also be fairly cold.

Nothing definitive yet on winter storms, but the Euro and GFS (and the AIFS - the AI version of the Euro, which has been quite accurate this winter) have occasionally been showing winter storms for our region (not necessarily all snow especially for 95 and the coast) and the ensembles all show elevated chances of snow for that the 1/19-1/24 period vs. normal. It's worth noting that all of those models have been showing nada after today's event through about 1/17 for 10+ days so it's not like they "always" show snow in the winter - far from it).

The CPC temperature outlook is for a bit below normal temps for 1/18-1/24 and the their precip outlook is for a bit above normal precip - that combo obviously makes wintry weather a bit more likely than usual, but it not a guarantee of seeing wintry weather. Also, it not being as cold as this past week or so likely means that we could see some mixed precip events (whereas the 1/6 and 1/11 storms ended up having so much cold air in place that the storm tracks were suppressed (and poor timing prevented phasing for today's storm, which could've brought a coastal storm closer).


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Summary: quiet this week, then some potential snow/wintry/mix events from about 1/19-1/23 and the polar vortex looks like it's coming around 1/20 for at least several days.

Details: So, after a quiet week this week (seasonable today and tomorrow, then well below normal through Friday with at most a few chances for flurries or a dusting), things could become active next weekend. We're now in the 7-10 day window, where patterns like this first show some winter storms on some model runs and we're definitely seeing that, as today's 12Z Euro shows a significant snowstorm (3-6" type event on the model) for the NEUS (including us) around 1/19 (day 7-8) and the 12Z CMC shows a significant snowstorm (also 3-6" event) for the NEUS (and us) around 1/21 (Day 9-10), while the 12Z GFS shows no storm in that timeframe, but the 6Z GFS showed a significant snowstorm (3-6" event) for the NEUS (and us) around 1/19 and we've also seen some runs with mostly rain, which can always happen with an inland track.

Operational models will often jump around from run to run at this juncture, which is why banking on a snowstorm this far out is foolish - this just shows there's potential. More importantly, the ensemble runs of these three models (Euro/CMC/GFS) have been consistently showing a few to several inches for the ensemble mean snowfall in the Day 7-10 timeframe (about 1/19-1/22) for a few days and continue to do so, which is a fairly strong signal for some snow. This is true even for the 12Z Operational run of the GFS which shows no actual storm (indicates many ensemble members and the mean show snow, while the Op doesn't, which implies the Op may be an outlier).

Beyond about 1/20, it's looking very likely that we're going to get a 4-5 day visit from the polar vortex, bringing very cold Arctic air into the eastern US (all the way down to Florida). For our area this will likely bring a string of days with highs below 32F (and likely in the 20s some days) and lows in the teens to single digits; very cool visualization of this in the first link below. Obviously, this is ridiculously far out for looking at snowfall potential, but clearly if there is cold air around, snow is very possible, especially when the cold starts to relent, as a fairly high percentage of our significant snowstorms occurs near the end of cold patterns with blocking, as per the 2nd link below and the accompanying graphic.





GhBSrOFbcAAJSbz
 
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Ha, I figured you might know him. Cool that he's an RU sports fan!

I remember reading Mt. Baker's 1,140 in record years ago, which is also the world record afaik, thinking I'd never see anything remotely close. But two years ago when UT broke snowfall records all over, was looking like an outside chance for a bit. Topped out just over 900 inches at Alta.

Always wondered if there are mountains deep in the Himalayas, AK or somewhere that have gotten even more than the 1,140 but without anyone to record it.
Ask and ye shall receive, lol. The Southern Patagonian Ice Field, where they get ~2000" per year, ftw!

 
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Another Snow Pattern Detected​



That's a very good article on what a cold and potentially snowy pattern is - and is not. Lots of chances coming up starting around 1/19 and going for a week or longer beyond that, but no guarantees of significant snow (just greater probabilities than usual).
 
Summary: quiet this week, then some potential snow/wintry/mix events from about 1/19-1/23 and the polar vortex looks like it's coming around 1/20 for at least several days.

Details: So, after a quiet week this week (seasonable today and tomorrow, then well below normal through Friday with at most a few chances for flurries or a dusting), things could become active next weekend. We're now in the 7-10 day window, where patterns like this first show some winter storms on some model runs and we're definitely seeing that, as today's 12Z Euro shows a significant snowstorm (3-6" type event on the model) for the NEUS (including us) around 1/19 (day 7-8) and the 12Z CMC shows a significant snowstorm (also 3-6" event) for the NEUS (and us) around 1/21 (Day 9-10), while the 12Z GFS shows no storm in that timeframe, but the 6Z GFS showed a significant snowstorm (3-6" event) for the NEUS (and us) around 1/19 and we've also seen some runs with mostly rain, which can always happen with an inland track.

Operational models will often jump around from run to run at this juncture, which is why banking on a snowstorm this far out is foolish - this just shows there's potential. More importantly, the ensemble runs of these three models (Euro/CMC/GFS) have been consistently showing a few to several inches for the ensemble mean snowfall in the Day 7-10 timeframe (about 1/19-1/22) for a few days and continue to do so, which is a fairly strong signal for some snow. This is true even for the 12Z Operational run of the GFS which shows no actual storm (indicates many ensemble members and the mean show snow, while the Op doesn't, which implies the Op may be an outlier).

Beyond about 1/20, it's looking very likely that we're going to get a 4-5 day visit from the polar vortex, bringing very cold Arctic air into the eastern US (all the way down to Florida). For our area this will likely bring a string of days with highs below 32F (and likely in the 20s some days) and lows in the teens to single digits; very cool visualization of this in the first link below. Obviously, this is ridiculously far out for looking at snowfall potential, but clearly if there is cold air around, snow is very possible, especially when the cold starts to relent, as a fairly high percentage of our significant snowstorms occurs near the end of cold patterns with blocking, as per the 2nd link below and the accompanying graphic.





GhBSrOFbcAAJSbz

Winter Pattern Update for the Philly-NJ-NYC area

Summary
: Some light rain, mostly, on 1/18 then a light to maybe moderate snow threat (could be some rain early SE of 95) on 1/19-20 and a more significant threat possible for 1/22-23, plus we get a full arctic blast starting 1/20 and lasting for at least 4-5 days. Still fairly high uncertainty on the 1/19-20 event (5-6 days out) and very high uncertainty for 1/22-23, as would be expected 8-9 days out. The AmericanWx thread below has lots of discussion of these threats.

Details: For the potential event on 1/19-20, the best guess at this range is a minor, 1-2" snowfall for most (with less, due to rain, possibly, towards the coast), but a 2-4" event is certainly possible, but so is a complete whiff, as the Euro/UK show about 1-2", the ICON shows 2-4", the CMC shows 1/2-1" and the GFS is a whiff. Still much can change though at this range.

For the potential 1/22-23 event, uncertainty is far higher, as today's 12Z model runs ranged from a significant snow/ice storm for the SE US (CMC) to a significant snowstorm for the SE/Mid-Atlantic (GFS) to significant snowstorm for our area (Euro), plus the ensembles are showing some storms and some misses. At 8-9 days out I wouldn't even hazard a guess as to what will happen, but the point is that there's some heightened potential for a winter storm vs. baseline expectations.

https://www.americanwx.com/bb/topic...-22-focused-inauguration-day-and-21st/page/8/
 
Winter Pattern Update for the Philly-NJ-NYC area

Summary
: Some light rain, mostly, on 1/18 then a light to maybe moderate snow threat (could be some rain early SE of 95) on 1/19-20 and a more significant threat possible for 1/22-23, plus we get a full arctic blast starting 1/20 and lasting for at least 4-5 days. Still fairly high uncertainty on the 1/19-20 event (5-6 days out) and very high uncertainty for 1/22-23, as would be expected 8-9 days out. The AmericanWx thread below has lots of discussion of these threats.

Details: For the potential event on 1/19-20, the best guess at this range is a minor, 1-2" snowfall for most (with less, due to rain, possibly, towards the coast), but a 2-4" event is certainly possible, but so is a complete whiff, as the Euro/UK show about 1-2", the ICON shows 2-4", the CMC shows 1/2-1" and the GFS is a whiff. Still much can change though at this range.

For the potential 1/22-23 event, uncertainty is far higher, as today's 12Z model runs ranged from a significant snow/ice storm for the SE US (CMC) to a significant snowstorm for the SE/Mid-Atlantic (GFS) to significant snowstorm for our area (Euro), plus the ensembles are showing some storms and some misses. At 8-9 days out I wouldn't even hazard a guess as to what will happen, but the point is that there's some heightened potential for a winter storm vs. baseline expectations.

https://www.americanwx.com/bb/topic...-22-focused-inauguration-day-and-21st/page/8/
We're just inside 5 days from the start of the event, and we're getting improved indications of at least some wintry weather/snow for our area. The 0Z Euro shows a 2-4" event for all, the CMC shows a 6"+ event 25+ miles NW of 95, but little to no snow for 95 to the coast, the UK shows a 1-2" event for most, the ICON shows a 3-6" event for most, and the GFS shows nada, except for maybe !" way NW.

Not ready to even guess what that means, but clearly a few to several inches are possible as is a whiff (although the GFS is an outlier here, so a whiff seems less likely). If we continue to see at least 1-2" on most of the models tomorrow at 12Z and 0Z, it'll be thread time. I will say that right now, this storm has more model support for at least 1-2" than the 1/11 event did at this point.

The 1/22-23 possible event probably has a higher ceiling but a lower floor than the 1/19 event, as the CMC shows a major snowstorm with temps in the teens, while the Euro storm is suppressed into the deep south (a few inches for TX to SC), and the GFS is closer with a significant winter storm for the Carolinas/GA, so a storm is looking likely, but it could end up anywhere.
 
Any potential impact for the Eagles-Rams playoff game on Sunday? 3 p.m. kick off.
 
wash-rinse-repeat. It's winter and since when does 1-2" mean anything? At least it didn't for most of my life. Get to 4"+ and THEN MAYBE schools were closed.
Somebody start posting a "storm warning" thread when we're going to get hit with a big one... (not saying don't enjoy your weather talk here but this is a ton of squeeze for a little juice)
 
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wash-rinse-repeat. It's winter and since when does 1-2" mean anything? At least it didn't for most of my life. Get to 4"+ and THEN MAYBE schools were closed.
Somebody start posting a "storm warning" thread when we're going to get hit with a big one... (not saying don't enjoy your weather talk here but this is a ton of squeeze for a little juice)
yeah the standards have been lowered...I think 3 events this year with about 1 to maybe 1.5...in the old days that would be so minor it would just get a small mention or a page or 2. Now with the advent of model watching and model hugging, people latch on to model runs 7 days out that show 4 inches even 8 inches plus and then try to hold out hope it will be one of the possibilites 24 hours before the event

we have 2 possible events coming, the first one is trending minor on most of the models but again 4-5 days out IT IS TOO SOON really for any certainty even though I assume Numbers will start a thread today. The 2nd storm has bigger potential but 7-9 days out no serious person should be discussing model runs this far out
 
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Any good ice skating around the state with all this cold? I was surprised Carnegie had some open water still on Sat.
 
No. Not cold enough Sunday.
Thank you. I know people will always say it's tough for warm weather teams to win on road in cold weather, but I don't think it will be much of an impact this week since the Rams can run the ball and their defense is playing much better than they were earlier in the season. Should be a good game.
 
Thank you. I know people will always say it's tough for warm weather teams to win on road in cold weather, but I don't think it will be much of an impact this week since the Rams can run the ball and their defense is playing much better than they were earlier in the season. Should be a good game.
I remember the Buccaneers beating the Packers at Lambeau for the NFC Championship just a few years ago
 
In case folks weren't aware, there could be some mostly light snow showers Thursday late afternoon/evening with maybe 1/4-1/2" (outside shot at up to 1") accumulation, which doesn't sound like much, but with snow possibly falling and accumulating on non-treated paved surfaces during the pm rush hour, given temps <32F, there could be some minor impacts. Doesn't seem thread worthy though.

https://www.weather.gov/phi/

473622554_10230672838078645_5768517265015789150_n.jpg
 
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We're just inside 5 days from the start of the event, and we're getting improved indications of at least some wintry weather/snow for our area. The 0Z Euro shows a 2-4" event for all, the CMC shows a 6"+ event 25+ miles NW of 95, but little to no snow for 95 to the coast, the UK shows a 1-2" event for most, the ICON shows a 3-6" event for most, and the GFS shows nada, except for maybe !" way NW.

Not ready to even guess what that means, but clearly a few to several inches are possible as is a whiff (although the GFS is an outlier here, so a whiff seems less likely). If we continue to see at least 1-2" on most of the models tomorrow at 12Z and 0Z, it'll be thread time. I will say that right now, this storm has more model support for at least 1-2" than the 1/11 event did at this point.

The 1/22-23 possible event probably has a higher ceiling but a lower floor than the 1/19 event, as the CMC shows a major snowstorm with temps in the teens, while the Euro storm is suppressed into the deep south (a few inches for TX to SC), and the GFS is closer with a significant winter storm for the Carolinas/GA, so a storm is looking likely, but it could end up anywhere.
Today's 12Z runs were all over the place with the Euro/UK/ICON all showing a 1-2/2-4" kind of snowfall for late Sunday afternoon into Monday morning, while the CMC showed a much stronger storm bringing 6"+ for areas 30+ miles NW of 95 (like along the DE river in NWNJ/NEPA and NW of there and a very sharp gradient from that to nothing, within 10 miles NW of 95 and from there to the coast), and the GFS showed a near miss for a few inches to our SE with the coast maybe getting 1". The NBM (model blend), below, shows a general 1-2" event for our region and this is where the NWS is leaning as per their discussion, below (noting snow is likely to be <2"). Will likely wait until after tonight's 0Z runs to start a thread, hoping for a bit more model consensus, as we'll be inside 4 days out for those runs.

The 1/22-23 potential event is literally all over the map from nada, due to suppression from the very cold air mass that will be in place starting Sunday (so a whiff is a decent chance with snow confined to the SE US or mid-Atlantic) to significant snow also being possible, but with major timing differences too, so we're going to need more time to figure out where that's headed.

https://www.weather.gov/phi/

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Precipitation, mainly in the form of rain, tapers off on Saturday
Night, with low temperatures dropping into the upper 20s/low 30s. A
strong arctic front is expected to arrive sometime Sunday, with a
much colder airmass advecting in behind it. Some guidance suggests
potential for a coastal system developing along the front late
Sunday into early Monday, bringing some snowfall to the region. 12z
suite of guidance has trended a bit more favorable in terms of
measurable snowfall. However, given that the system will be rather
weak and progressive, snowfall totals and resulting impacts appear
minor. NBM Probabilities of 2+ inches of snow (also known as
advisory criteria for most of the region) is around 10-20%
regionwide. Have maintained chance PoPs region wide (25-50%), with
the higher end of that range coming for areas south of Philadelphia.
Temperatures on Sunday will climb into the mid to upper 30s/low 40s
on Sunday. This will likely be the last time temperatures get above
freezing until at least the end of next week. The arctic airmass
arrives beginning Sunday Night as lows will drop into the mid to
upper teens with some spots staying above 20.

m63oLyO.png
 
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Any good ice skating around the state with all this cold? I was surprised Carnegie had some open water still on Sat.
We had some good skating conditions late last week and into the weekend in the coastal Monmouth county area.. Looked OK today(but no one was on it), and my guess is it will be good tomorrow.

After a weekend thaw with the big cold dropping in Monday, mid next week should be good as well.
 
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Not sure why you even mention a model like the Icon
People crapping on the ICON are basing that on old information. It now has higher resolution than even the Euro and did quite well with both Beryl and Ian (tropical) and seems middle of the road for snow in our area. Did quite well for 1/6, when most models had shifted way south showing no snow for CNJ, but it still had an inch or two, but it didn't do great for 1/11. Many pros in Europe, who have more experience with it (it's a German model) seem to like it a lot. None of the models is perfect and they all have their biases, which is why I tend to like the NBM (the model blend) as it might not be as accurate as certain individual models, but will rarely be way off like some models can be.
 
Lee Goldberg thinking a 1-3" snowfall on Sunday with the higher amounts S of 78 and towards the coast. Not an official forecast yet, but his early thoughts.
 
Today's 12Z runs were all over the place with the Euro/UK/ICON all showing a 1-2/2-4" kind of snowfall for late Sunday afternoon into Monday morning, while the CMC showed a much stronger storm bringing 6"+ for areas 30+ miles NW of 95 (like along the DE river in NWNJ/NEPA and NW of there and a very sharp gradient from that to nothing, within 10 miles NW of 95 and from there to the coast), and the GFS showed a near miss for a few inches to our SE with the coast maybe getting 1". The NBM (model blend), below, shows a general 1-2" event for our region and this is where the NWS is leaning as per their discussion, below (noting snow is likely to be <2"). Will likely wait until after tonight's 0Z runs to start a thread, hoping for a bit more model consensus, as we'll be inside 4 days out for those runs.

The 1/22-23 potential event is literally all over the map from nada, due to suppression from the very cold air mass that will be in place starting Sunday (so a whiff is a decent chance with snow confined to the SE US or mid-Atlantic) to significant snow also being possible, but with major timing differences too, so we're going to need more time to figure out where that's headed.

https://www.weather.gov/phi/

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Precipitation, mainly in the form of rain, tapers off on Saturday
Night, with low temperatures dropping into the upper 20s/low 30s. A
strong arctic front is expected to arrive sometime Sunday, with a
much colder airmass advecting in behind it. Some guidance suggests
potential for a coastal system developing along the front late
Sunday into early Monday, bringing some snowfall to the region. 12z
suite of guidance has trended a bit more favorable in terms of
measurable snowfall. However, given that the system will be rather
weak and progressive, snowfall totals and resulting impacts appear
minor. NBM Probabilities of 2+ inches of snow (also known as
advisory criteria for most of the region) is around 10-20%
regionwide. Have maintained chance PoPs region wide (25-50%), with
the higher end of that range coming for areas south of Philadelphia.
Temperatures on Sunday will climb into the mid to upper 30s/low 40s
on Sunday. This will likely be the last time temperatures get above
freezing until at least the end of next week. The arctic airmass
arrives beginning Sunday Night as lows will drop into the mid to
upper teens with some spots staying above 20.

m63oLyO.png
Sung to Fiddler on the Roof for the Jan. 22-23 event: Supppression, Suppppresssion …. Suppression!
 
Working a J&J gig in Fort Lauderdale all next week. ****ing loving it.
 
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