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February 11-12; 12-13: Are they real??


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1 minute ago, TSG said:

There will be blocking in place when the storm arrives Tuesday. The low that went North of us yesterday will become the 50/50

 

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Indeed. Even so...seeing as it's just getting established perhaps it won't be as strong as it was that day, and things tick north some. Orrrr I could be just wish casting :lol:

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Trust me, I hope we do get that north Trend. Another 50 miles would be great.
I've noticed the last few years you can't just count on them like we used to. Not sure if it's models being more accurate but it's not as pronounced as it once was.
I think for this year there's been a trend in the medium to short range to deamp systems which is probably some of it.

Definitely agree on the deamp trend as we get closer to storms. Also, on the “north trend” subject, I suppose it’s been more about banding setting up further north than the actual storm itself. Think many of us look at the bottom line - aka snow accumulation maps - and hope for a “north bump” but in reality, the storm can track exactly as depicted while having the banding placement slightly wrong. The 1/6 and other January storm both had this happen. Models nailed the track generally but C MD got kinda screwed because banding setup further north near the M/D line. EPS brings the coveted purples to just south of the Baltimore - Columbia latitude. Wouldn’t necessarily take a northern trend with the system itself to get those 6-7” totals up that way
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1 hour ago, psuhoffman said:

Some snow weenie in NE MD did something very very bad. One of y’all needs to fess up so they can make whatever sacrifice is necessary. 
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My guess is TowsonWeather. He just comes on here to yell at people on the RIC form. It’s time for you to take him behind the woodshed.

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33 minutes ago, jayyy said:


Definitely agree on the deamp trend as we get closer to storms. Also, on the “north trend” subject, I suppose it’s been more about banding setting up further north than the actual storm itself. Think many of us look at the bottom line - aka snow accumulation maps - and hope for a “north bump” but in reality, the storm can track exactly as depicted while having the banding placement slightly wrong. The 1/6 and other January storm both had this happen. Models nailed the track generally but C MD got kinda screwed because banding setup further north near the M/D line. EPS brings the coveted purples to just south of the Baltimore - Columbia latitude. Wouldn’t necessarily take a northern trend with the system itself to get those 6-7” totals up that way

If I remember correctly didn't banding set up much further north into PA and there was kind of a screw zone between the heavy stuff around DC and points south and the banding?

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2 minutes ago, Chris78 said:

If I remember correctly didn't banding set up much further north into PA and there was kind of a screw zone between the heavy stuff around DC and points south and the banding?

Greatly disjointed areas of frontogenesis in that one. H7 shot way north over N & C PA vs southern and the h85 closer to the low was down over DC/NoVA. I don’t expect them to be that separated in a system like this, where the surface low/any associated coastal isn’t a big factor. 

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2 hours ago, Buddy1987 said:

Any met or long time lurker  ( @clskinsfan @nj2va @CAPE) want to give me their best shot as to what they think shakes down this way in SW VA? We are so close on the line down here between a heavy snow or heavy ice scenario I’m having a hard time. How out on an island do you think GFS is compared to other guidance?

Tough call for your area. My wag is a thump followed by a nasty ice storm down there. I hope you get a couple inches of snow up front before the ice. Will make cleanup much easier. 

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3 hours ago, wxmvpete said:

We've seen some subtle north trends over the past 12-24 hours. Using Tomer Burg's site, we can see the 700mb heights have ever so slightly increase over the past 5 runs over the Mid-Atlantic. This could be a combination of the primary system being a little slower, the northern confluence exiting a smidge faster, the increased latent heat release in the south aiding in slightly higher heights, or frankly all of the above. I'm a sucker for Q-vectors (always have been) and Tomer's site does show Q-Vectors converging better over the Mid-Atlantic on Tuesday, implying better mid-level convergence over the region that aligns favorably beneath the divergent right-entrance region of a roaring 175 knot 300mb jet streak over New England. Not to mention a healthy IVT that supplies plenty of moisture to work with.

The mesoscale processes involved do show a good consolidated area of 850-700mb FGEN, but be cognizant of where the 700mb FGEN aligns. We've seen at least one instance where the 700mb FGEN has led to a stronger northern band of snow (thinking of an event over north-central PA a month ago or so). Regardless, the synoptic-scale look is one that can favor some hefty snowfall rates Tuesday afternoon into Tuesday night, but this is still be TBD over the next 24-36 hours as guidance starts to key in more on those mesoscale factors. WPC's Winter Storm outlook shows mostly 30-50% probs for snowfall amounts exceeding warning criteria for effectively all of northern VA and a good chunk of MD along and south of I-70 for the time being. >50% probs are farther south.

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The latest 18Z WSO (probabilities of exceeding warning criteria) expanded noticeably to the north. This is likely taking into account the more recent CAMs and northern extent of some of the ensembles. We've seen those southern tracks still in place but that's a notable increase across northern VA on east into the eastern DC/Baltimore metros. I also added the WSO probabilities for Freezing Rain for southwest VA. A strong signal for significant icing in those parts.

Screenshot 2025-02-09 134506.png

WSO ice.png

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10 minutes ago, jlewis1111 said:

Bro ric is not getting 15 inches.. We are lucky if we get 2 lol

After seeing wxmvpete post…agree with you.  One of the best features of this forum is getting insight few ever see.  All snow is good and you’ll get some too.  Cheers to that.  

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15 minutes ago, wxmvpete said:

The latest 18Z WSO (probabilities of exceeding warning criteria) expanded noticeably to the north. This is likely taking into account the more recent CAMs and northern extent of some of the ensembles. We've seen those southern tracks still in place but that's a notable increase across northern VA on east into the eastern DC/Baltimore metros. I also added the WSO probabilities for Freezing Rain for southwest VA. A strong signal for significant icing in those parts.

Screenshot 2025-02-09 134506.png

WSO ice.png

Man that certainly is encouraging 

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