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Feb 8th-9th Potential Significant Coastal Storm


dryslot

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In winter 2004 "white Juan" hit Nova Scotia.

 

This looks like being "white Sandy" -- if it pulls together.

 

Here's something else to ponder.

 

New moon dates

 

Mar 12 1888 12z (no precise data but close to perigeean)

 

Feb 7 1978 15z (perigee Feb 5 12z)

 

Feb 10 2013 07z (perigee Feb 7 12z

 

-------------------------------------

 

Just looking at new GGEM 72h and it stays with the program, based on that would say snowfall potential is 20-35 inches for BOS and 25-40 inches a few miles inland to almost PVD, 20 inch contour central Long Island through central CT and MA into se NH and running about I-95 to Bangor then into central NB. Some local max could be four feet (!!). 10 inch contour looks to be about JFK to western MA to central NH.

 

Agree with concerns about hurricane force gusts over Cape and rain-snow line would edge just southeast of BOS to Newport RI line at height of storm, so that snowfall amounts 10-20 inches and rainfall 1.0-2.0 inches in a zone of s.e. MA and 5-10 inches snow with 2.0-3.0 in rain on the outer Cape and the islands. Winds could reach NE 60 mph gusting to 90 in that zone, 45 gusting 70 BOS.

 

This looks to have epic potential, near-perigeean new moon aspects will heighten storm surge and wave overtopping concerns anywhere south of NH-ME border for certain.

:weenie:
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Several GEFS members get sleet into interior CT for a time...it goes back to heavy snow, but might be something to watch for CT/RI and SE MA.

 

Agreed. Also watch for some funky dry slot/banding issues between the core of the cold conveyorbelt and a second batch of forcing from the deformation well north and west.

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How ironic that this is pulling together on the 35th anniversary of the Blizzard of '78. 

 

One of the earlier posts (and I'm not going through 25 prior pages...sorry) stated something about new moon and moon perigee.  Guess what?  It's lining up VERY similar to the '78 storm...

 

New Moon  Sunday 2/10 1223 AM

Moon Perigee  Thursday 2/7 709 AM (hope I have the times right).

 

Now, it's not perfect, but it's darn close.

 

Those of you whom were not around for '78, this may just be the storm you'll be talking about to your kids and grandkids.

 

Only one problem I'm having...stalling.  From what I see on the GEM above, the H5 is not cutting off.  I did notice on the GFS that it was slowing down, hence the longer period now mentioned on the AFD and winter storm watch.

 

VERY interesting times coming...

 

--Turtle

 

I am guilty - it was me;  well, it may have been one other, not sure, but I mentioned the Spring Tide schedule and concern.

 

 One saving plausibility ... or at least question here is whether this systems life spans consecutive high tides.   The first would be impressive in there is an anomaly in place, but the 2nd is usually the bully. 

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Several GEFS members get sleet into interior CT for a time...it goes back to heavy snow, but might be something to watch for CT/RI and SE MA  specifically Mt Tolland in CT.  Could see it sleeting at that specific location for the main heavy time of the storm.

 

 

Yeah Will... seems a lockable solution there -

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I am just blown away from this morning's model runs for snow totals...Severe Epic snow event upcoming for New England...I saw snow totals like this back in the 70's but folks..this is just outright insane for what we will be seeing unfold across the region Friday and into the weekend...who would of thought this was going to happen...coming out of almost a benign winter and BAM!

Clearly historical in all respects.

http://northeastweathereye.com

Augusta Maine

Craig

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I am guilty - it was me; well, it may have been one other, not sure, but I mentioned the Spring Tide schedule and concern.

 

One saving plausibility ... or at least question here is whether this systems life spans consecutive high tides.

I'm not blaming anyone, John...just didn't want to take the time to go back 25 pages!! Sorry to imply that. Have LOTS to do today to get ready (and I'm shocked I haven't got a call...yet...).

 

That's a very good point. That's a natural thought when thinking of stalling (which I didn't take the logical step...glad you did!! :) ). However, lots more development along the coast, so could still be bad. Could be two tide cycles?? (For those that don't recall...'78 had FOUR tide cycles with continuous flooding.)

 

--Turtle

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This storm reminds me a lot of Feb 14 2007, but 100-200 mi further east:

 

* Feb 2007 was the first significant snowstorm of the season, occurring mid-Feb after an otherwise snow-starved season

* NAO is near neutral for both storms, with an AO<0 but not significantly so

* Primary 850 mb low over southern Ontario / western NY state, eventually becoming overtaken by a secondary that forms over the Mid-Atlantic

* Overall dominant northern-stream, but significant moisture source to the south

* Cold high pressure over the Great Plains

* Troughy over the SW U.S.

 

Compare the upper-air pattern for Feb 2007 to the 54 h GFS forecast (especially at 850):

 

Feb 2007 NARR:

post-378-0-41790300-1360171397_thumb.gif

 

12Z GFS 54h:

post-378-0-74245200-1360171403_thumb.gif

 

 

The most memorable thing about Feb 2007 for me was that I was in Albany at the time, and it was the day before the storm was the only time I had ever seen the NAM spit out >4" qpf of snow for KALB.  GFS had something like 2/2.5" qpf snow, but in both models, Albany on north was expected to be in the jackpot. 

 

However, the strength of the primary over the Great Lakes was underestimated in all the guidance, even as the storm was beginning to unfold.  Stronger WAA ahead of the primary resulted in a period of sleet over the Capital Region, reducing snowfall amounts.  Just slightly further west, stronger deformation along a more impressive moist tongue in the region where the entire column remained below freezing resulted in 4-6" /hr all snow. 

 

Accumulation map shows a large area > 30", but west of all the guidance 24-48 hr before the event:

http://www.erh.noaa.gov/aly/Past/2007/Feb_14_2007/SnowMap.jpg

 

Clearly this is a different synoptic setup than 2007, but with the eerie similarities, I would not be surprised to see eastern MA / RI getting more sleet than currently modeled, with the "jackpot" shifting further west with time.  Especially w.r.t. today's 12Z NAM. 

 

 

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