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Significant Ocean Storm March 5-7 2013 Discussion Part II


earthlight

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That doesn't work in March. Oh well, I'd much rather prefer a nice CCB like previously modeled. But we'll see. 

in 18 hrs we get roughly an inch for the city and 0.75ish for nearby burbs. I think yanksfan overstated the light precip long duration thing, bc from my standpoint this looks a lot like the nam from 12z which would have accumulated fine.

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how are temps at 850/925/950/surface?

surface looks similar to the nam-ish and the 850's are below 0 throughout. Too lazy to compare to 09z though lol. Either way if the sref verified it'd be heavy snow for a period that would accumulate. My concern is that the end result will be less precip over a longer period a la the euro.

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in 18 hrs we get roughly an inch for the city and 0.75ish for nearby burbs. I think yanksfan overstated the light precip long duration thing, bc from my standpoint this looks a lot like the nam from 12z which would have accumulated fine.

Really need both batches of precip to fall at night, light to moderate doesn't cut in the day now especially closer to the coast. Not a reflection of BL temps just a matter of precip intensity coupled with solar insulation. 

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Storm surge potential up to 8 feet? :lmao:

 

The storm surge for Sandy in Reynolds Channel was about 7.5-8ft, I believe. What ridiculousness when winds look like they'll be fairly run of the mill (we've had 40-50mph gusts many times in Nor'easters), and northerly.

 

Yeah, really. 8 feet may be a bit much... 

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While we cry over what could have been at least we can smile as we listen to DT admit to busting on the airwaves! :)

http://www.1140wrva.com/player/?station=WRVA-AM&program_name=podcast&program_id=RMNPodcasts.xml&mid=22945685

 

Richmond is a tough spot for die hard snow lovers. Climo really works against getting significant snow there especially

in March.

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I find it really, really difficult to forecast more than 1-3" for any location in and around the metro area in this situation. Not only are totals higher than that unlikely without a direct impact from the CCB and associated favorable lift and dynamics...but any area that might see those higher totals is too hard to discern at this point.

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A good link to bookmark:  PSU SREF spaghetti plots and departures from normal:

 

http://cms.met.psu.edu/sref/ensembles/

 

The 15z SREFs have trended toward a much stronger signal for another burst of snow Thu night/Fri morning.  While all of you guys are looking at QPF trends, I find it's more relevant to look at trends aloft to see what's driving the trends.  

 

Look at the trends in 850 mb moisture flux on Thu night from the 15z SREF vs. 9Z.  The 15z SREF is modeling a 850 mb moisture flux of over 3 SD above normal for LI/CT, quite a strong signal.

 

15Z SREF:

post-88-0-73174000-1362513439_thumb.gif

 

9Z SREF:

post-88-0-19141000-1362513487_thumb.gif

 

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<p>Also note the easterly wind component at 850 mb is 5+ SD above normal Thu night, as modeled by the SREF mean:</p>

<p> </p>

<p> </p>

 

 

Terrific post. Thanks for sharing this. 

 

We really might have to hope for that 2nd burst, then. Good thing the Euro is the model most enthused with it. 

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