November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
Current snow depth for eastern side of CA and northern New England. Deep into Quebec about 6" of snow OTG and you see northern New England has nothing.

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Re: November 2021 Obs & Discussions
Hints #MJO Madden Julian Oscillation may get a bit of a kick deeper into W Pacific heading into early Dec
— Marco Petagna (@Petagna) November 21, 2021
Response to more E focused #LaNina in Equatorial Pacific perhaps?
A push into phase 7 should increase chances of N blocking, although note impacts of La Nina on this below: pic.twitter.com/MdHfkCPYZW
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Re: November 2021 Obs & Discussions
Quick Sunday tweet...but need to keep close tabs on this signal for the MJO to perhaps get towards 5-6-7 (further into the W Pacific) over the next 14 days. Would aid in bringing further amplification to the pattern & *potentially* increase the risk of disrupting the strat vortex pic.twitter.com/cKg04Cb31Q
— Matt Hugo (@MattHugo81) November 21, 2021
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Re: November 2021 Obs & Discussions

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Re: November 2021 Obs & Discussions
Just something to think about.

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Re: November 2021 Obs & Discussions
Stratosphere is going strong and cold; centered just off the pole but on the Asian side of the hemisphere. Result appears to be losing the AO and NAO, both going positive. With the base state of the atmosphere in a La Niña, flirting with moderate status, and the MJO pulse recirculating through the phases 4-6 we are also losing the negative WPO, the positive PNA and we continue to have a positive EPO.
This is pretty much every teleconnection going the wrong direction all at once. Does this mean it can’t snow or that we won’t see flakes? Not necessarily, but it likely means AN temps will be the theme with days wearing short sleeves in early December are possible. Like when the modeling is depicting a shift towards colder pattern, we still have to see how it all evolves however.
Like you said though Ray sometimes things have to get worse in order to get better. I just hope the MJo pulses are strong enough to make enough of an impact to disrupt the strat. If there continues to be weak to moderate amplitude through these phases it may not be enough to substantially weaken the Strat vortex. For the time being I am going to remain skeptical.
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Re: November 2021 Obs & Discussions
sroc4 wrote:Ray. Good to see you back. You kind of beat me to it. I was going to try and write up some thoughts this week, despite them not being very encouraging for the short and medium term.
Stratosphere is going strong and cold; centered just off the pole but on the Asian side of the hemisphere. Result appears to be losing the AO and NAO, both going positive. With the base state of the atmosphere in a La Niña, flirting with moderate status, and the MJO pulse recirculating through the phases 4-6 we are also losing the negative WPO, the positive PNA and we continue to have a positive EPO.
This is pretty much every teleconnection going the wrong direction all at once. Does this mean it can’t snow or that we won’t see flakes? Not necessarily, but it likely means AN temps will be the theme with days wearing short sleeves in early December are possible. Like when the modeling is depicting a shift towards colder pattern, we still have to see how it all evolves however.
Like you said though Ray sometimes things have to get worse in order to get better. I just hope the MJo pulses are strong enough to make enough of an impact to disrupt the strat. If there continues to be weak to moderate amplitude through these phases it may not be enough to substantially weaken the Strat vortex. For the time being I am going to remain skeptical.
Thanks, brother! It’s nice to be back!! Sorry that I’ve been so aloof since Henri, but I’ve been working seven days a week ever since, and haven’t had much time for anything else. However, that should end this Friday, and just in time for our most active season

You bring up a great point with the NAO/AO positive states coupling with the intensifying stratospheric vortex, positively interfering with the unfavorable MJO standing wave over the Maritime Continent, and I fully agree. I think our December and first half of January is lost to repeating cutters with trailing cold fronts and wind. However, as much as it will hurt, we should look for as strong of a standing MJO pulse into phases 5-6-7 as we can get during that period (which I think will be the result thanks to a cooperative La Niña setup/devolvement), because with a coupled descending negative QBO phase, I’m actually beginning to like our prospects for a significant stratospheric vortex disruption, if not an entire breakdown/split come approximately in time for the New Year. Given the 4-6 week lag, on average, the start of the flip around week three of January would fit that context pretty well. We’d likely have one massive cutter, and then would have to watch for something to dumbbell it’s way around right behind it to start things with a nice bang as the blocking starts finding its way down through the Troposphere.
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions

This is EXACTLY what we want to see in future runs of guidance, and we want to see it sustain itself. However, even though I think it’s too fast by a few weeks, it lends a little credence to my previously outlined ideas. WE TRACK!!
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
A nice 40 degrees outside. At least it 'feels' like winter!
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Re: November 2021 Obs & Discussions
Noll Alludes to it a Jet Retraction would be helpful for a time being before and leading up to and through the holiday season.
Hunting for snow chances in the Northeast
— Ben Noll (@BenNollWeather) November 23, 2021️
After the current cold pattern, a strong Pacific jet (🟠) will send rather mild air across the U.S. early next month.
This could pull back () in the 2nd/3rd week of December, allowing for cold air to return to the northern tier
pic.twitter.com/fZ1m985rrv
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Re: November 2021 Obs & Discussions
That cold pool is going to shunt the cold and allow PAC air to invade the CONUS by the looks of this as Noll points it out as well. Hopefully it is not as pronounced and pulls that trough over the BC region a bit to allow some of that cold air to bleed in. I'll take N to ~ 3* above normal IF we can. Long ways to go of course.
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Re: November 2021 Obs & Discussions
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Re: November 2021 Obs & Discussions
That's a classic December Nina look
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Re: November 2021 Obs & Discussions
Euro for sunday/Monday. Has eps support
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Re: November 2021 Obs & Discussions
algae888 wrote:
Well that would be nice!
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Re: November 2021 Obs & Discussions
algae888 wrote:Not sure what everyone else is seeing but 12 of the next 14 days look to be below normal starting with yesterday for CPK. That is the longest stretch of below normal temps in many months. Last night and today's guidance have shifted to a more colder pattern due to the pollward aleutian ridge which is now a little further East than previously modeled. Classic nina December. also the polar vortex is on our side of the globe If you believe the EPS and GEPS. Several clippers are going to pass through starting Sunday and continuing into next week any one of them could produce our first snow of the season here. I don't believe the MJO is driving the pattern right now It's basically been in the circle of death And the next wave looks to be weaker according to latest guidance Obviously things can change but I am somewhat encouraged today
It may be below average, but it’s a pattern that doesn’t really support any meaningful snow. I’m not ruling out a weak wave or a clipper that could drop an inch or two, but any sizable storm is going to cut and surge us back into the 50s or even near 60 for the foreseeable future, IMO.
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Re: November 2021 Obs & Discussions
algae888 wrote:
This demonstrates that point perfectly. Note how the body of the negatively anomalies is sitting over British Columbia. That’s the kiss of death for us. And you can also easily see the southeast ridge fighting back. As we get closer, watch for this to correct to more eastern ridge and western/northwestern trough, more trough over Nova Scotia with a storm track to our west and north. Rinse, wash, repeat through December.
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