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January 6-7 Storm Discussion: we’re due?


WxUSAF
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1 minute ago, Deck Pic said:

This would be a really good storm for WV panhandle/Winchester/Westminster and even some areas to the east of that line

rcdxMDV.png

Honestly it’s not terrible for me at all. I would take 5-6” in a heartbeat. 

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Upon closer look it’s slightly colder than 12z. And a pretty good improvement from. 18z. The op only went to 90 but it was headed towards a train wreck and there is a reason mo one posted the 18z eps control. This was a decent step better than that. Slightly better than 12z imo. But not the big jump like the gfs/ggem/uk 

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14 minutes ago, psuhoffman said:

About to find out but so far slightly better high pressure over the top. 1-2 mb stronger and anchored further west.  Slightly weaker wave than previous euro stronger than gfs. 

Great on high to west and +mb. Hope low not below 1000 until past OC

 

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3 minutes ago, ravensrule said:

Honestly it’s not terrible for me at all. I would take 5-6” in a heartbeat. 

You don't want to be on the eastern side of a gradient like that.   It could mean 1-2".  Fortunately, the euro is an outlier right now.

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2 minutes ago, Deck Pic said:

You don't want to be on the eastern side of a gradient like that.   It could mean 1-2".  Fortunately, the euro is an outlier right now.

I hear you. Hopefully it comes around tomorrow, because we all know when it’s an outlier it’s generally correct. Thanks for the info. Have a great night. I love the avatar btw. Hopefully we get that many inches. 

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2 minutes ago, WEATHER53 said:

Great on high to west and +mb. Hope low not below 1000 until past OC

 

1001mb as it crosses Hatteras 

999mb just southeast of OC

994 east of cape may. 
 

it doesn’t start to deepen until it’s east of us. That’s fine. It’s just warmer than the other 0z guidance. It trended better with the high than the 12z and 18z euro but it wasn’t to the gfs/ggem level and that made the difference. We don’t need any adjustment to the track or depth of the coastal. We just need it to be a couple degrees colder. 

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12 minutes ago, Deck Pic said:

This would be a really good storm for WV panhandle/Winchester/Westminster and even some areas to the east of that line

rcdxMDV.png

 

all of the signals have been solid out here for almost a week now--I'm starting to get optimistic.

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6 minutes ago, psuhoffman said:

1001mb as it crosses Hatteras 

999mb just southeast of OC

994 east of cape may. 
 

it doesn’t start to deepen until it’s east of us. That’s fine. It’s just warmer than the other 0z guidance. It trended better with the high than the 12z and 18z euro but it wasn’t to the gfs/ggem level and that made the difference. We don’t need any adjustment to the track or depth of the coastal. We just need it to be a couple degrees colder. 

The 1000ish works and east of OC by 50miles or so is great . Two big positive factors like that and low 20’s dews at start and it’s Exciting!

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24 minutes ago, midatlanticweather said:

Memory here, but I feel the Euro was late to the party a while back too and was warm. That was AGES ago now so I may be just wishcasting. 

BUT, that same storm did changeover and other models were colder.... so.. maybe not.. going to sleep a few hours

 

We got model runs to check out, lol. Storm is going to improve even more.:sled:

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Almost no change to the overall look between 12z and 18z over mid-atl. Might be settling in. GFS still wiggling around. Looks like a solid hit to the classic northern/higher elevation spots (Fredrick/Carroll/ WV PH / MD PH)

Bit more than a wiggle on the gfs tonight I’d say.


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Latest from NWS Sterling

LONG TERM /SATURDAY THROUGH TUESDAY/...
A strong southern stream mid/upper-level trough over the Mid-South
Friday night quickly moves northeast as it phases into a flat trough
over the OH Valley/Mid-Atlantic on Saturday. At the surface, an
associated area of low pressure develops along the northern Gulf
Coast and very quickly moves across the Southeast states through
Saturday morning. The surface low becomes better organized as it
crosses eastern NC into far southeast VA, where it moves offshore
along the NC/VA border.

Precipitation overspreads the area from southwest to northeast
starting late Friday night into Saturday. Temperatures Friday night
are forecast to be below freezing for most of the area. However,
there is considerable uncertainty to the east of US-15 as easterly
winds advect in a warmer marine airmass and strong WAA ahead of the
surface low help to increase temps along/east of I-95. All that
being said, precipitation is likely to start out as snow west of US-
15 and a rain/snow mix along/east of US-15. As the morning
progresses, areas east of I-95 are most likely to transition to a
cold rain, with steady snow west of US-15, and a mix in between.

Having the surface high well to the north and weak onshore flow
proceeding the surface low are not generally favorable for
accumulating snow along I-95. Any chance to see higher snow totals
there will be dependent on higher precip rates and wet bulb effects
overcoming the marginal temperature profile.

Still, p-type is going to be highly sensitive to the track of the
low, with a tight rain-snow gradient likely. Significant snow
accumulations are most likely along/west of the Blue Ridge and
Catoctins. Where precip is more likely to be in the form of rain,
near and east of I-95, there is the potential for instances of
flooding. Continue to monitor the progress of this storm as the
weekend approaches.

The coastal low tracks northeast and away from the area Saturday
night, then a reinforcing upper traverses the area on Sunday. Some
lingering rain and snow showers possible during the first part of
Monday north of I-66 and west of the Blue Ridge, though conditions
dry out quickly in the afternoon. Upslope mountain snow showers
continue into Sunday night.

 

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5 minutes ago, Weather Will said:

Latest from NWS

LONG TERM /SATURDAY THROUGH TUESDAY/...
A strong southern stream mid/upper-level trough over the Mid-South
Friday night quickly moves northeast as it phases into a flat trough
over the OH Valley/Mid-Atlantic on Saturday. At the surface, an
associated area of low pressure develops along the northern Gulf
Coast and very quickly moves across the Southeast states through
Saturday morning. The surface low becomes better organized as it
crosses eastern NC into far southeast VA, where it moves offshore
along the NC/VA border.

Precipitation overspreads the area from southwest to northeast
starting late Friday night into Saturday. Temperatures Friday night
are forecast to be below freezing for most of the area. However,
there is considerable uncertainty to the east of US-15 as easterly
winds advect in a warmer marine airmass and strong WAA ahead of the
surface low help to increase temps along/east of I-95. All that
being said, precipitation is likely to start out as snow west of US-
15 and a rain/snow mix along/east of US-15. As the morning
progresses, areas east of I-95 are most likely to transition to a
cold rain, with steady snow west of US-15, and a mix in between.

Having the surface high well to the north and weak onshore flow
proceeding the surface low are not generally favorable for
accumulating snow along I-95. Any chance to see higher snow totals
there will be dependent on higher precip rates and wet bulb effects
overcoming the marginal temperature profile.

Still, p-type is going to be highly sensitive to the track of the
low, with a tight rain-snow gradient likely. Significant snow
accumulations are most likely along/west of the Blue Ridge and
Catoctins. Where precip is more likely to be in the form of rain,
near and east of I-95, there is the potential for instances of
flooding. Continue to monitor the progress of this storm as the
weekend approaches.

The coastal low tracks northeast and away from the area Saturday
night, then a reinforcing upper traverses the area on Sunday. Some
lingering rain and snow showers possible during the first part of
Monday north of I-66 and west of the Blue Ridge, though conditions
dry out quickly in the afternoon. Upslope mountain snow showers
continue into Sunday night.

 

NWS Mount Holly is in overall agreement-

A shortwave trough along the subtropical jet will eject out of the Gulf Coast region and lift across the Mid Atlantic. An associated area of low pressure will strengthen as it moves through the southeast and up the Mid-Atlantic coast Saturday and into Sunday. The exact track of this surface low will determine what specific impacts there will be. It is worth mentioning that the latest deterministic guidance has shifted slightly further offshore and leaned towards a weaker system overall, potentially allowing for a slightly colder solution, albeit still not enough for an "all- snow" solution. With that said, we can expect guidance to continue the "tug-of-war" of where to place the center of this low, thus it remains in our best interest to stick closer to the consensus blend, which continues to show a low track that gives our higher elevations along the I-78 corridor the best chance for snow with a highly uncertain precip type forecast for the I-95 corridor and points south and east. Guidance should come into better focus in the next 24-48 hours as the shortwave trough responsible for this system moves over the western US and can be better sampled by upper air observations. Bottom line, this system bears watching and is setting up to bring heavy precipitation, gusty winds, and potential coastal flooding though with strong onshore flow. See hydrology section below for more details regarding rainfall and flooding potential.

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