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March 2023 Obs/Disco


40/70 Benchmark
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the EPS (and GEPS to a lesser extent) is basically a perfect pattern progression. every synoptic feature is here for a major storm somewhere on the EC around the 10th:

  • highly anomalous, decaying -NAO over the Davis Strait
  • anomalous -EPO/-WPO to deliver Arctic air into the E US
  • highly anomalous, semi-permanent 50/50 ULL
  • signal for a vigorous S/W ejecting out of the Rockies as the PNA trends neutral... likely ending up slightly positive due to the Pacific Rex block

I want to see increased ENS support for this progression, mainly from the GEFS, but this is about as high-end of a pattern progression as you can get. compare this to the 7-day preloading composite for NYC's 18"+ storms... there are any of the same pattern features, namely the decaying west-based block and deep 50/50 ULL. SNE also gets large storms with this kind of composite, but it is admittedly harder N of BOS

I don't mean to honk this early, but this is the best looking pattern progression since Feb 2021, which was the last blizzard spawning from this type of pattern. many of the same features show up there, as well. it's not a coincidence

ecmwf-ensemble-avg-nhemi-z500_anom-1677499200-1678276800-1678536000-40-1.thumb.gif.7ae0648fc9baa949e43efc1ee004f0a4.gifezgif-4-872aaf5548.gif.928f3e07c7cdec018144d510c6676772.gif

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4 minutes ago, brooklynwx99 said:

the EPS (and GEPS to a lesser extent) is basically a perfect pattern progression. every synoptic feature is here for a major storm somewhere on the EC around the 10th:

  • highly anomalous, decaying -NAO over the Davis Strait
  • anomalous -EPO/-WPO to deliver Arctic air into the E US
  • highly anomalous, semi-permanent 50/50 ULL
  • signal for a vigorous S/W ejecting out of the Rockies as the PNA trends neutral... likely ending up slightly positive due to the Pacific Rex block

I want to see increased ENS support for this progression, mainly from the GEFS, but this is about as high-end of a pattern progression as you can get. compare this to the 7-day preloading composite for NYC's 18"+ storms... there are any of the same pattern features, namely the decaying west-based block and deep 50/50 ULL. SNE also gets large storms with this kind of composite, but it is admittedly harder N of BOS

I don't mean to honk this early, but this is the best looking pattern progression since Feb 2021, which was the last blizzard spawning from this type of pattern. many of the same features show up there, as well. it's not a coincidence

ecmwf-ensemble-avg-nhemi-z500_anom-1677499200-1678276800-1678536000-40-1.thumb.gif.7ae0648fc9baa949e43efc1ee004f0a4.gifezgif-4-872aaf5548.gif.928f3e07c7cdec018144d510c6676772.gif

Its been a good 2nd half here; I'm happy to share the love and not be the jackpot if it reduces suffering.

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47 minutes ago, brooklynwx99 said:

the EPS (and GEPS to a lesser extent) is basically a perfect pattern progression. every synoptic feature is here for a major storm somewhere on the EC around the 10th:

  • highly anomalous, decaying -NAO over the Davis Strait
  • anomalous -EPO/-WPO to deliver Arctic air into the E US
  • highly anomalous, semi-permanent 50/50 ULL
  • signal for a vigorous S/W ejecting out of the Rockies as the PNA trends neutral... likely ending up slightly positive due to the Pacific Rex block

I want to see increased ENS support for this progression, mainly from the GEFS, but this is about as high-end of a pattern progression as you can get. compare this to the 7-day preloading composite for NYC's 18"+ storms... there are any of the same pattern features, namely the decaying west-based block and deep 50/50 ULL. SNE also gets large storms with this kind of composite, but it is admittedly harder N of BOS

I don't mean to honk this early, but this is the best looking pattern progression since Feb 2021, which was the last blizzard spawning from this type of pattern. many of the same features show up there, as well. it's not a coincidence

ecmwf-ensemble-avg-nhemi-z500_anom-1677499200-1678276800-1678536000-40-1.thumb.gif.7ae0648fc9baa949e43efc1ee004f0a4.gifezgif-4-872aaf5548.gif.928f3e07c7cdec018144d510c6676772.gif

George01 probably feels it is unfair for you to use 'blizzard' in context when he gets targeted for social destruction whenever he does ... hahahaha

No, but I see where you are coming from. Echoing my earlier sentiments, I'm a bigger fan for post cold loading --> block relaxation windows in general.  

When I map that potential ( as is emergent now...) over top my own methodology ...I see March 11-12-13, but the 10th is certainly doable/adjustable at this range.  Sure -

 

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4 hours ago, brooklynwx99 said:

the EPS (and GEPS to a lesser extent) is basically a perfect pattern progression. every synoptic feature is here for a major storm somewhere on the EC around the 10th:

  • highly anomalous, decaying -NAO over the Davis Strait
  • anomalous -EPO/-WPO to deliver Arctic air into the E US
  • highly anomalous, semi-permanent 50/50 ULL
  • signal for a vigorous S/W ejecting out of the Rockies as the PNA trends neutral... likely ending up slightly positive due to the Pacific Rex block

I want to see increased ENS support for this progression, mainly from the GEFS, but this is about as high-end of a pattern progression as you can get. compare this to the 7-day preloading composite for NYC's 18"+ storms... there are any of the same pattern features, namely the decaying west-based block and deep 50/50 ULL. SNE also gets large storms with this kind of composite, but it is admittedly harder N of BOS

I don't mean to honk this early, but this is the best looking pattern progression since Feb 2021, which was the last blizzard spawning from this type of pattern. many of the same features show up there, as well. it's not a coincidence

ecmwf-ensemble-avg-nhemi-z500_anom-1677499200-1678276800-1678536000-40-1.thumb.gif.7ae0648fc9baa949e43efc1ee004f0a4.gifezgif-4-872aaf5548.gif.928f3e07c7cdec018144d510c6676772.gif

Say it with me now...everyone....March 1956.

 

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30 minutes ago, 40/70 Benchmark said:

I just spend like 3 hours the other day blogging about it. Check my outlook thread.

Additionally, odds are always strongly against rolling snake eyes twice in one season in a pattern like that.

this is some absolutely ridiculous shit. as loaded is it gets, no exaggeration. that is telegraphing a KU verbatim

F6647B26-AE89-457E-B42E-69FDB184B8D3.thumb.gif.a7a0cb85fdcd1767edff2a55035580ab.gif

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54 minutes ago, brooklynwx99 said:

this is some absolutely ridiculous shit. as loaded is it gets, no exaggeration. that is telegraphing a KU verbatim

F6647B26-AE89-457E-B42E-69FDB184B8D3.thumb.gif.a7a0cb85fdcd1767edff2a55035580ab.gif

Have you seen the 0Z GEFS in week 2? It just about completely caved to the colder EPS!

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55 minutes ago, dmcginvt said:

My question is did SSW have to do with this? The science doesnt seem strong yet it seems like it's happening.  Seems like it was maybe , maybe ,maybe and now yes?.  So is it?

 

 

It absolutely did. This event propagated downward, which is the smoking gun.

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5 minutes ago, 40/70 Benchmark said:

It absolutely did. This event propagated downward, which is the smoking gun.

 And now we have an even bigger plunge of the 10 mb strat winds at 60N to -19 m/s occurring now! The major SSW plunge to -13 m/s in mid Feb was impressive enough, but even it pales somewhat in comparison to what's happening now. So, this tells me that the SPV is very likely the weakest it has been during winter by a good margin since the great Feb of 2018 SSW.

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49 minutes ago, GaWx said:

 And now we have an even bigger plunge of the 10 mb strat winds at 60N to -19 m/s occurring now! The major SSW plunge to -13 m/s in mid Feb was impressive enough, but even it pales somewhat in comparison to what's happening now. So, this tells me that the SPV is very likely the weakest it has been during winter by a good margin since the great Feb of 2018 SSW.

Ga keeps us updated on this as well. This very well could push full spring back until sometime in April.  @40/70 Benchmark great stuff. Been keeping up with your stuff even from down in WNC.  

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