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Jan 17-18th disco thread--1st big threat of the year


Midlo Snow Maker

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Discussion and Forecast

 

Decided not to wait until 11pm.

 

I like what I am seeing on the radar as far as KY/TN and the precip mass along GA/AL border. There is good northward motion even though the overall move is ene-ne.  At this point I think the movement would have to switch to due east in order for DC to miss out and that is not likely.  If anything, we could have more of a temperature issue than a missing out out issue.

Some of the posters have discussed deformation issues and I will leave that out as it's too difficult to predict if, where and when.  This looks like a 2-4" snowmaker for DC area

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Agreed. This is a classic deformation zone with positive frontogenesis. I haven't seen bufkits in the area but if dendritic growth is there where the RH/lift is maximized (looks like it), there will be a solid area of 1-2"/hr type bands sitting over a spot for quite enough time to bust high.

 

True but I can also remember cases when the the gradient was really tight and they got 8 inches in Prince Frederick which is in the middle of my county and I got zilch living in the northern end of the county and I was supposed to get several inches.  Tight gradients can screw you lots of ways.  You can get under the deformation zone and a band that goes stationary and not very far way someone gets nothing.  That's the problem.  The fact that the higher resolution models seem to be holding the precip farther south is a concern at least to me. 

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True but I can also remember cases when the the gradient was really tight and they got 8 inches in Prince Frederick which is in the middle of my county and I got zilch living in the northern end of the county and I was supposed to get several inches.  Tight gradients can screw you lots of ways.  You can get under the deformation zone and a band that goes stationary and not very far way someone gets nothing.  That's the problem.  The fact that the higher resolution models seem to be holding the precip farther south is a concern at least to me. 

 

Oh yeah...the risks are heightened for sure. You obviously know this, but the very strong right bands usually have a subsidence exhaust zone just W or NW of the band.

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not to back pat especially since it's probably not the same overall, but mentioned jan 30 when this first showed up before we went back to ignoring it

http://www.americanwx.com/bb/index.php/topic/38526-january-2013-mid-long-range-disco-thread/?p=1990259

Well, I think it's a "feel good" analog when folks up here in the DC area feel a shaft coming. I will be anxious to see what the 00Z runs show for 21Z-03Z tomorrow evening. It may end up being a small window of opportunity up here, but nevertheless one where 1-3" in the DC metro is still within a 50th percentile (where 10th/20th percentile is nothing and 80-90th is closer to 6+").

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Well, I think it's a "feel good" analog when folks up here in the DC area feel a shaft coming. I will be anxious to see what the 00Z runs show for 21Z-03Z tomorrow evening. It may end up being a small window of opportunity up here, but nevertheless one where 1-3" in the DC metro is still within a 50th percentile (where 10th/20th percentile is nothing and 80-90th is closer to 6+").

Yeah that was a pretty perfect storm of this type given the cold etc. this 500 track isn't that different tho. I guess even if we get the shaft it's good to see the southern stream perform a bit.

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Hey guys, brand new here and reading through the pages this forum sounds like fun and you all have really good info and analysis.  Question and smack me if it has been answered but local mets in richmond discussing their RPM model and saying it is showing no snow for RIC and very little south of here. Anyone know why?  I can't find that model anywhere.

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Greetings from the New England thread; first time outside the NE forum--I hope you get hit hard by the storm.  Having just enjoyed 5" today, I'm already envious of you folks getting some tomorrow.

 

I'm hoping you can give me your best synopsis of the BWI area with respect to start/end time and how much snow.  I'm driving down to Baltimore tomorrow night.   Thanks for providing your take on it--and enjoy it!

 

mike

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Hey guys, brand new here and reading through the pages this forum sounds like fun and you all have really good info and analysis.  Question and smack me if it has been answered but local mets in richmond discussing their RPM model and saying it is showing no snow for RIC and very little south of here. Anyone know why?  I can't find that model anywhere.

 

The RPM model is always used by news stations and I'd take what that model says with a grain (perhaps a brick) of salt. 

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Hey guys, brand new here and reading through the pages this forum sounds like fun and you all have really good info and analysis.  Question and smack me if it has been answered but local mets in richmond discussing their RPM model and saying it is showing no snow for RIC and very little south of here. Anyone know why?  I can't find that model anywhere.

Don't take my word on it, but assuming we do well up north, I think that Richmond is in a pretty good spot.

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Hey guys, brand new here and reading through the pages this forum sounds like fun and you all have really good info and analysis.  Question and smack me if it has been answered but local mets in richmond discussing their RPM model and saying it is showing no snow for RIC and very little south of here. Anyone know why?  I can't find that model anywhere.

 

Curious which local met is saying no snow for RIC? I need to remember to never watch that station for weather. We should get at least 4" maybe 6"+ here in Richmond.

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Hey guys, brand new here and reading through the pages this forum sounds like fun and you all have really good info and analysis.  Question and smack me if it has been answered but local mets in richmond discussing their RPM model and saying it is showing no snow for RIC and very little south of here. Anyone know why?  I can't find that model anywhere.

yea that seems to be flying around face book right now lol.  welcome aboard

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Greetings from the New England thread; first time outside the NE forum--I hope you get hit hard by the storm.  Having just enjoyed 5" today, I'm already envious of you folks getting some tomorrow.

 

I'm hoping you can give me your best synopsis of the BWI area with respect to start/end time and how much snow.  I'm driving down to Baltimore tomorrow night.   Thanks for providing your take on it--and enjoy it!

 

mike

 

Baltimore won't be getting much, most likely a dusting, if that. You'd have to go further south, and well south of DC for anything significant.

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not to back pat especially since it's probably not the same overall, but mentioned jan 30 when this first showed up before we went back to ignoring it

http://www.americanwx.com/bb/index.php/topic/38526-january-2013-mid-long-range-disco-thread/?p=1990259

Not to back pat but .....

http://www.americanwx.com/bb/index.php/topic/38526-january-2013-mid-long-range-disco-thread/page-15?

:)

To be honest, the week has worked out differently than they were modeling, but they did have the possibility.

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