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February 8th Potential Bomb Part II


earthlight

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NJZ002-NYZ067>070-070515-/O.NEW.KOKX.WS.A.0001.130208T1800Z-130209T1800Z/WESTERN PASSAIC-ORANGE-PUTNAM-ROCKLAND-NORTHERN WESTCHESTER-401 PM EST WED FEB 6 2013...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGHSATURDAY AFTERNOON...

 

* HAZARD TYPES...HEAVY SNOW AND FREEZING RAIN.* ACCUMULATIONS...SNOW ACCUMULATION OF 10 TO 18 INCHES...ALONG  WITH UP TO A QUARTER OF AN INCH OF ICE.* WINDS...NORTH 15 TO 25 MPH WITH GUSTS UP TO 50 MPH.* TEMPERATURES...IN THE UPPER 20S.

 

 

So basically I'm going to lose power for a week again, lol.

 

Bring it on.

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Yeh , If it`s stronger like the Euro has believed for the last 3 or so days , the deepening process is faster you close off earlier in the cycle , its a colder and a more rubost solution .

Most of discussions for DC area are that the low to the northwest of DC(Ohio Valley) will provide too much mild air.  So I am asking that if this southern stream is stronger would that weaken, strenghthen or have no effect on the Ohio Valley low

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Yeh , If it`s stronger like the Euro has believed for the last 3 or so days , the deepening process is faster you close off earlier in the cycle , its a colder and a more rubost solution .

 

The Euro has a good handle on the convection now so I don't think that it will have much of an impact on its forecast.

But the NAM has been notorious for big misses in convection strength and placement with skews its runs form time to time. Heck, the NAM was even off with the convection on the late December run the day of the storm. I am not sure why they

can't fix the NAM's initializations.

 

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There you go, winterwarlock. We have shown meteorologically why the NAM is wrong and the Euro is more likely to be right. The NAM is completely missing the convection that is currently going on, while the Euro has a better handle on it. 

 

I'd argue that the convection currently going on bodes well for the southern stream, and I'd be skeptical of models trying to really dampen it out.

 

However, I can definitely see it moving too quickly in the progressive regime. But considering the height rises that would result from the increased convection, it might be able to slow down enough for an earlier phase. 

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There you go, winterwarlock. We have shown meteorologically why the NAM is wrong and the Euro is more likely to be right. The NAM is completely missing the convection that is currently going on, while the Euro has a better handle on it.

I'd argue that the convection currently going on bodes well for the southern stream, and I'd be skeptical of models trying to really dampen it out.

However, I can definitely see it moving too quickly in the progressive regime. But considering the height rises that would result from the increased convection, it might be able to slow down enough for an earlier phase.

Everyone should read this and read it again concerning the nam. Thanks Doug.

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Maps will be posted soon. Tmagan gets them I believe. Its like the early arw bombs on the srefs. Destroys all of us.

The big thing here is the primary is dead by 48 hrs...and it looks like the h7 lows are consolidating further south

3295_100.gif

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Personally if I was doing NYC forecasts I'd probably just put the NRN part of the 3 ERN CT counties and maybe Putnam/Orange into WSWs right now, way too uncertain still about the rest of the areas. 

i disagree wsw as opposed to warning allows for uncertainty....regardless i will be shocked if wsw arent issued forwholenymetro

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Personally if I was doing NYC forecasts I'd probably just put the NRN part of the 3 ERN CT counties and maybe Putnam/Orange into WSWs right now, way too uncertain still about the rest of the areas. 

i disagree wsw as opposed to warning allows for uncertainty....regardless i will be shocked if wsw arent issued for whole nymetro

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Most of discussions for DC area are that the low to the northwest of DC(Ohio Valley) will provide too much mild air.  So I am asking that if this southern stream is stronger would that weaken, strenghthen or have no effect on the Ohio Valley low

The only effect the southern stream energy will have on the northern stream low will be when it phases with it. That will cause the activity to shift offshore with the coastal low and for the energy to shift, which causes a strong low to also form aloft and close off. This causes the warm air to end its northward advance, and develop very heavy precip to the west and north of it due to effective moisture transport around the closed off mid level lows. So we want the phase to happen as soon as possible. If they remain two separate entities, we keep the warm air and a lot less precip.

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GFS started....biggest run in a looong time for us...if trending weaker/SE with the southern stream, I am concerned....if not looking good. Good to have the GGEM/RGEM/SREFs/EURO in your camp...but I want the GFS.

 

When the GFS has funky runs on the 18Z it tends to be suppressed and SE, I would not worry at all until 00Z runs do something different.

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The RGEM is a much better (accurate) model than the NAM, IMO. It's probably one of the more underrated models we have. I can't think of a short term model that's better than the RGEM. 

 

Wow, I didn't realize that it was that accurate. Appreciate the insight.

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