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Model discussion for May


Ginx snewx

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A cold brutal start, but it appears we moderate quickly to more climo norms the first week, with the models torching us the 8th -15th. It appears finally that winters back will be broken however after mid month, troughy conditions return which could lead to some more miserable days.

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A cold brutal start, but it appears we moderate quickly to more climo norms the first week, with the models torching us the 8th -15th. It appears finally that winters back will be broken however after mid month, troughy conditions return which could lead to some more miserable days.

 

We might need a suicide watch for some on this board if that happens.

 

I think a bigger question is will this be another May that puts some snow on the ground.  That would be a nice ending to an epic winter.

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80+ May 4th - 5th on Euro

Yeah happy b'day to me. Too bad it's a d10 op run. If we can keep that low over the SE maybe we can pull off a halfway decent stretch starting next week.

Ens look pretty warm for the 4th as well. Maybe a NW flow COC stretch?

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Yeah happy b'day to me. Too bad it's a d10 op run. If we can keep that low over the SE maybe we can pull off a halfway decent stretch starting next week.

Ens look pretty warm for the 4th as well. Maybe a NW flow COC stretch?

 We might be able to have a decent stretch, but I get nervous with the ridge still out west after the first week of May. That trough over the SE may allow for over-the-top Tippy warmth to spill in, but then heights rise in Greenland too.

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We might be able to have a decent stretch, but I get nervous with the ridge still out west after the first week of May. That trough over the SE may allow for over-the-top Tippy warmth to spill in, but then heights rise in Greenland too.

Yeah we could be on the wrong side of things too. Like you said, that trough/ridge west of the MS is a little west for my liking for this time of year. I think we'll at least be able to pull off some transient warm days though.
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Yeah Scott... as I was digesting the various data sources it was appealing as an over-the-top warm up.  

 

No Sonoran, style ... but definitely continental/insolation processed heat.  I also agree that if the ridge node parks @ or W 90 lon, there runs BD risk there.   The S/W trajectory becomes ESE out of Ontario in that sort of circulation set up, and backsides of them WILL drill unmodeled boundaries down to the MA.  Thing is, those kind of events can have shockingly differential temperature before and after BD, and not really show up in 500mb thickness pattern very well do to their shallower nature only effecting the lowest partial thickness... They can literally be no more than 1,300 meters deep.  

 

As is, though, the ridge progressive across 4 or 5 days; if so that would lower the odds for that consequence.  

 

Sufficed it is to say ... whether we get that type of local scaled off-set, the large scaled circulation is completely different than anything we've seen in quite a long, long while. In fact, I don't recall seeing 3-5 day ridge stint E of 100 W in over a year, actually. That's a trend bucker; inherently questionable, but we'll see.   

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6z GFS had it...many 6z GEFS members too. Euro/EPS came west with the low from 12z yest to 00z last night. Like Scott said...wait for the 12z Euro, but I unfortunately think this has legs. I'd rather stay dry and comfortably tiptoe into the warmer pattern, but what can ya do?

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It's interesting in that the most reliable operational model types are operating opposite their longer term endemic biases...

 

The Euro tends to over dig and slow systems down in this particular time frame, where as contrasting the GFS is typically the other way with flattening and speeding events along.  Yet here we have the GFS the most amped and slowest, and the Euro kicks things along. 

 

I wonder if that's related to slackening gradient and shortening wave lengths ...sort of like "sinusoidal"  The curve flips... 

 

12z Euro seems more amped, tho - heh.  spring being spring I suppose...

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Can't remember what spring it was ... but it was one of those over the last 5 years.  This sort of is reminding me of that.  

 

D1, 50s everywhere

 

D2, 84 @ ALB;  62 @ BOS

 

D3, 94 everywhere...   

 

Not as extreme, no, but the 12z Euro continues to advertise a complete and utter paradigm shift away from that which has been producing the following: 

 

nmaps.gif

 

..seemingly since January.  In fact, I think every month since has had this weird "only cold in eastern Canada and Ayer Mass" affliction...

 

According to NASA ...March was the 3rd warmest March ever, behind 2002.  Interestingly, I recall it snowed in May that year. I wonder if there's something to the whole world warming up when we get tucked in with cold off the maritimes.  

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