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Feb Long Range Discussion (Day 3 and beyond) - MERGED


WinterWxLuvr
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1 hour ago, CAPE said:

There has been more of an emphasis on the lead energy out in front of the main trough on the Euro and Para, which gets the coastal going sooner and further south. The last couple runs of the GFS/GEFS took a pretty big step towards that idea.

With the ICON, Euro, UKIE in one camp, I would think the gfs insistence on taking that low basically due north up just west of the apps is wrong.

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4 minutes ago, WinterWxLuvr said:

With the ICON, Euro, UKIE in one camp, I would think the gfs insistence on taking that low basically due north up just west of the apps is wrong.

It seems to be moving towards that camp.

This is one thing I have noticed on the Euro and Para- more of a focus on that vorticity max out ahead.

1613703600-pUlaVd8QOd0.png

1613714400-Ksf3boq17Cg.png

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11 minutes ago, WinterWxLuvr said:

Just a couple of days ago it seems that I was reading that winter is over but looking at the temps on the 6z gfs it sure doesn’t seem that way. Also looks now that maybe at least a modified version of the Arctic air gonna be able to make some inroads on our area.

The pattern looks ok to me going forward, as long as the positive spike in the AO and NAO is temporary. Both the GEFS and EPS have the AO/NAO going negative the last few days of the month and into March. With a significantly -PNA being forecast, we need the blocking.

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14 minutes ago, WinterWxLuvr said:

Just a couple of days ago it seems that I was reading that winter is over but looking at the temps on the 6z gfs it sure doesn’t seem that way. Also looks now that maybe at least a modified version of the Arctic air gonna be able to make some inroads on our area.

If anything, it does look like there’s an AN period next week before colder air returns heading into March. 

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Just now, blueberryfaygo said:

I know that the GFS is  not as good the euro wrt to the overall progression.. but it also gives us the most snow... All of this is the front end thump (before flipping):

 

image.thumb.png.ceeedaffb4ca5388a903495ac400f9a6.png 

Gotta be careful with those maps though...Im pretty sure theres a good period of sleet/Freezing rain in there, that the map is counting as snow

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1 minute ago, Baltimorewx said:

Gotta be careful with those maps though...Im pretty sure theres a good period of sleet/Freezing rain in there, that the map is counting as snow

The next six hours is the sleet and freezing rain (valid 00z).. it shows 2 more inches of snow but its probably sleet.. the above shows the panels ending 12z and 18z which stay snow for everyone north of Baltimore...

Its a heathy thump...

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1 hour ago, CAPE said:

The pattern looks ok to me going forward, as long as the positive spike in the AO and NAO is temporary. Both the GEFS and EPS have the AO/NAO going negative the last few days of the month and into March. With a significantly -PNA being forecast, we need the blocking.

A -pna -NAO is actually a really good pattern in March. A lot of our March snows featured that look. 

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2 minutes ago, Brett said:

New member to the forums here but I read that the advertised -NAO is going to be eastern based. Does that matter? A few people said it is not good to be eastern based?

Welcome!  West based is better. East based can work but it’s less a sure thing. It’s also not static. It will shift around. 

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2 minutes ago, Brett said:

New member to the forums here but I read that the advertised -NAO is going to be eastern based. Does that matter? A few people said it is not good to be eastern based?

An east based nao is not the greatest snow look in dec, but with shorter wavelengths it becomes less of an issue in March. West is still ideal always.

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Just now, CAPE said:

Agree,. Success largely hinges on getting some pretty robust blocking though to keep the SE ridge in check.

Yes. The pac is finally hot garbage after this week. Luckily it waited until the part of winter when the pac matters the least. Still if it’s going to be that awful we will need the NAO to offset.  

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