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November 2013 pattern and discussion


WxJordan

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Maybe it's just me, but the 12z Canadian looked really close to something big. It did appear to drive the upper energy harder to the south, but didn't quite fully phase with the southern stream wave. Even still, it looks like many would end as some flakes from roughly I-95 west in NC, and the upstate of SC.

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Hard to tell how much would be snow but the Euro puts something down @180 for NC. Looks alot like the GFS @192....this could get interesting for Thanksgiving. Figures since I'll be in Florida. 

How far north does the precip shield get on the Euro?  Out of curiosity?

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Based on the Euro, most areas will be rain for the duration of the event, with the only exception the mountains, which could pick up snow before the main precipitation band pushes out and then again from northwest flow. This seems like a reasonable solution for late November.

 

BUT... There are so many little things that can change this forecast that we need to watch. Temperatures at the ground and aloft are 6-10 degrees F to warm most locations north of I-85 in places like Hickory, Statesville, Winston-Salem, Asheville, etc. in North Carolina. If the storm pushes farther off the coast, that is one way we can get cooler air into the area. If the northern phase drifts further south, that would provide another shot of cold air. That will all come down to perfect timing.

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At 240, Euro has a solid cross polar flow developed just like the GFS with a block west of AK moving into the arctic.  Amazing at the agreement with the Euro and GFS so far out. 

 

It also has some energy in the SW looking to head east. I would be interested to see what the Euro ENS looks like outside of 240. 

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Last nights 0z run had a cold looking pattern for the east in the 11-15 day range.

 

Can we post maps from pay sites now?

 

 

Nope pay sites are still out. I'll probably pick up AccuWx soon. With GFS and Euro looking closer together it has my interest. I always kind of just look over it when both models are spitting out different scenarios especially when each run is different. Seems they are now honing in on something. 

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Nope pay sites are still out. I'll probably pick up AccuWx soon. With GFS and Euro looking closer together it has my interest. I always kind of just look over it when both models are spitting out different scenarios especially when each run is different. Seems they are now honing in on something. 

I have weatherbell, they have the euro ensembles for past day 10.

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Doesn't the Canadian seem to have a habit the last couple of winters to over play the cold? Just seems that way to me anyways. Totally anecdotal just wondering what your take on the CMC is recently. 

 

In this case, I'm not sure the *cold is being overplayed considering GFS and Euro solutions, as much as it might be overdoing how far south it goes. It's timing is definitely the ideal one at the moment though.

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Nope pay sites are still out. I'll probably pick up AccuWx soon. With GFS and Euro looking closer together it has my interest. I always kind of just look over it when both models are spitting out different scenarios especially when each run is different. Seems they are now honing in on something. 

 

Regarding our Model Center, I'm hoping to get some premium Euro data from a source in the coming days.  Waiting to hear back from the contact on some options.  We know that's the one main thing that keeps us from getting a bunch of the Accuwx, SV, and WxBell customers.

 

And on posting maps from the MC, we don't mind posting a map or two to go along with a post. Posting like every single map from an entire run would be frowned upon, however.  :bag:

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Regarding our Model Center, I'm hoping to get some premium Euro data from a source in the coming days.  Waiting to hear back from the contact on some options.  We know that's the one main thing that keeps us from getting a bunch of the Accuwx, SV, and WxBell customers.

 

And on posting maps from the MC, we don't mind posting a map or two to go along with a post. Posting like every single map from an entire run would be frowned upon, however.  :bag:

 

This can probably move to OT but I would gladly support AmWx MC but that is my one hang up. SV just has some darn good Euro maps. Outside of that I did like the GFS model output. 

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Doesn't the Canadian seem to have a habit the last couple of winters to over play the cold? Just seems that way to me anyways. Totally anecdotal just wondering what your take on the CMC is recently. 

 

Unfortunately my take on the Canadian recently is that it has been a real mess. It over-deepens everything and is generally just not a very reliable model. I can remember a winter event back in 2011 (sad I have to think back that far) where it actually was colder and more suppressed with southern stream energy and it ended up verifying, so it's not like it is always wrong - just usually :cry:. Anyways, just pointing out that the H5 look of it is much closer to what we'd need to have happen.

 

The fact we have a near-neutral NAO means that most likely the more flat northern stream solution will verify though unless the western ridge can somehow amplify just due to the Pacific - but in all honesty, it's not likely. This one very well may just be a swing and a miss, but that's the fun thing about weather, once in a while it just works out how you want it to despite everything.

 

 

In this case, I'm not sure the *cold is being overplayed considering GFS and Euro solutions, as much as it might be overdoing how far south it goes. It's timing is definitely the ideal one at the moment though.

 

 

Exactly. Well said.

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RAH not providing any mention of wintery precip in afternoon discussion. Probably smart thing to do.

 

TUESDAY AND WEDNESDAY:
THE SURFACE HIGH MOVES OFFSHORE TUE AS MODELS DEVELOP AND AREA OF
LOW PRESSURE OVER THE NORTH CENTRAL GULF. MODELS DIFFER WITH THE
HANDLING OF THIS SYSTEM IN THE EXTENDED...BUT DO AGREE THERE WILL BE
INCREASING MOISTURE WITH THE SOUTHERLY FLOW LATE TUE INTO WED. HOW
THE SYSTEM PHASES/INTERACTS WITH THE RELOADING NORTHERN STREAM
TROUGH ACROSS THE EAST U.S. WILL HAVE GREAT IMPACTS ON THE FORECAST
FOR TUESDAY INTO WEDNESDAY ACROSS THE REGION... WITH POSSIBLY A
COASTAL SYSTEM AND A GOOD CHANCE OF RAIN/SHOWERS. EXPECT CONTINUED
BELOW NORMAL TEMPS DURING THIS TIME... WITH INCREASING ODDS FOR
PRECIP FROM LATE TUE INTO EARLY WED. THE NEXT COLD AIR SURGE WILL
MOVE IN FROM THE NW BEHIND THIS SYSTEM WED NIGHT.
 

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