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Model Mayhem!


SR Airglow

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7 minutes ago, weathafella said:

CMC still has it.

The Friday deal is basically nothing... except maybe an inch in far SE areas.

It does have the weekend system though..... looks good for Boston Providence Southeast for high end advisory.

hopefully we can get something in that Friday to Monday period to work out 

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7 minutes ago, TauntonBlizzard2013 said:

The Friday deal is basically nothing... except maybe an inch in far SE areas.

It does have the weekend system though..... looks good for Boston Providence Southeast for high end advisory.

hopefully we can get something in that Friday to Monday period to work out 

Don't concentrate on the ops this far out.  It's still in clown range.  Ensembles look ok.

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4 minutes ago, Damage In Tolland said:

Plenty of EPS and ensemble support for the end of wee/weekend storm. 

This is more typical when we start to get blocking were models will suppress stuff and then slowly bring it back as you get closer . SE ridge ain't going away.

Agree

Always happens with big storms.Show it in the long range then lose it and then bring it back.

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10 minutes ago, Damage In Tolland said:

That said..I don't see this being a big storm..More likely is 1 or 2 weaker waves..The first one might be snow to ice..the second would be snow..This is for SNE I'm speaking.

Possible

-Pna might really hurt our area in regards to a big storm.

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5 minutes ago, Damage In Tolland said:

Seems to be one of those cycles we run thru where 00z takes wintry pattern away and 12z are Ginx Gone Wild where everyone gets excited and starts the Leon talk. 

Wonder why this always happens in pattern changes?

It could be correct. We don't know yet.

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I think between hr 96 and hr 110 we're looking at some snow. When that 500 mb low cuts off in eastern Ontario the baroclinic zone slows to a favorable position for cyclogenesis southeast of our region. There is good agreement with this on the ensembles. Hypothetically, as my base case, the potential would result in a quick hitting moderate event. 

 

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I'm sure this 12z operational GFS presently churning off the Crays will go out of its way to thwart what I'm about to say one way or the other... but, I don't see snow so much as a mix/ice, as the best expression winter has to offer over the next 5 days. ...unless we count 37 F mist ...

Primary impetus for that is the timing/modeled (multiple guidance type consistency...) polar high arming and/or node situated N of Maine initially...

The handling of that feature ...as to how slow or fast it bodily moves off that ~ lat/lon toward the east, as the flow aloft freshens from the SW and flows initially normal to it's location ...is of obviously paramount importance. Right now and recently in the runs it is lagged just enough to offer typical BL resistance issues/ageostrophic wall and preventing low level warm intrusion.  Slam dunk look for that sort of thing actually.   I mean ...we're also into the time of year when climatology argues cold removal is almost always correcting slower. Any mid range warm intrusions typically become less in verification as typical error. 

Code for ... wouldn't shock me if the warm never gets N of LI in that look. 

But, while all that is happening, the sounding are f'ed for snow, period. 850s end up wafting to +5 C all the way to Concord NH ...

What does that leave us... actually, the charts haven't really wavered much on that overall evolution.  Barring a crystal ball telling us that something erratic and unexpected happens to alter, I feel better than median confidence for triple point with a wave or two or perhaps a couple splitting seaward under our latitude.  Whether the typical ageostrophy and so forth in the interior has it as 30 to 33 F limb sagger or 35 to 41 F mist bather result ...neither changes the perception (at this time) in my mind that the interior stays on the chilly side with the mix-smell of cold water and chimney smoke through that synoptic evolution.

Change the lower tropospheric PP ...?  Sure, then we'll talk.

Having said all that... now I have qualify it with one small little but real concern. At 72-90 hours or so, there is a small amount of DPVA arcing through the OV.  I'm not entirely confident that won't change the land-scape of that M/A wave handling as we closer to the total translation of mid week events.  More than anything ... I think it just enhances that lead M/A wave even more and that helps to hold in some of that drain in the interior.  We'll see...

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