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potential for a few (million) mangled flakes part 2


Alpha5

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Euro will be truly telling. Whichever american model it goes towards will probably be closer to the ultimate solution being that were 2 days out

The RGEM being a little east could be a clue. Tonight's 0Z Nam was probably the dream run for much of the immediate coast. Quick rain then we crash to 33-34 by dark and snow like hell for 6 hours or so.

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That is an amazing run for the far interior.. When I say far interior I mean FWN...MGJ..SWF...POU

Yeah it is. The clown maps on vista have 8-12" down into the immediate suburbs of NYC.

Probably cut those in half...still 4-8" roughly and the possibility of 6 or more over West and NW NJ into SE NY.

A western outlier amongst guidance right now but we will see where things go this evening.

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The RGEM being a little east could be a clue. Tonight's 0Z Nam was probably the dream run for much of the immediate coast. Quick rain then we crash to 33-34 by dark and snow like hell for 6 hours or so.

Unfortunately the RGEM is still pretty warm

http://collaboration.cmc.ec.gc.ca/cmc/cmdn/pcpn_type/2011102800/I_nw_r1_EST_2011102800_045.png

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Yeah it is. The clown maps on vista have 8-12" down into the immediate suburbs of NYC.

Probably cut those in half...still 4-8" roughly and the possibility of 6 or more over West and NW NJ into SE NY.

A western outlier amongst guidance right now but we will see where things go this evening.

Would East Rutherford count as a immediate suburb of NYC?

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things went quiet ehh?

GFS wouldnt be soo bad if the low was 990ish and deepining... but a "weaker" storm doesnt draw in cold air as fast... for those of us along the I-95 corridor. A NAM/GFS blend would be fantastic for all.

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Again I think the key thing to watch is the kicking shortwave that will be located out in Montana/North Dakota as this system evolves.

w80ozc.gif

Looking at both the GFS and the Nam, its obvious that the reason why the GFS is further west and more amplified with the system is the simple fact that the flow is more amplified. Both the ridge in the Western Atlantic is stronger, and the ridge that represent the lull in between the two shortwaves (with the next one back towards Montana) is also more amplified on the 540dm. What is interesting is that the GFS has trended slower with this kicker shortwave, while the nam has trended faster. This difficult part of this forecast is that the kicker is currently offshore between Alaska and the Pacific NW, so we aren't really getting any radiosondes into the core of the 500mb trough currently. Still though, I'd have to lean towards the GFS having a better solution because the 500mb feature in question is on the edge of the NAMs gridded domain, where a lot of its model errors arises. Also interestingly the RGEM showed a similar less amplified solution and it is also a gridded model (run over North America). Thus, perhaps the differences in the evolution of the 500mb trough here are related to differences in spectral vs. nested grid models.

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things went quiet ehh?

GFS wouldnt be soo bad if the low was 990ish and deepining... but a "weaker" storm doesnt draw in cold air as fast... for those of us along the I-95 corridor. A NAM/GFS blend would be fantastic for all.

I think everyone was watching the World Series.... WOW! What a game!

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I think the upstream trof/ridge amplification plays a bigger role in our storm's evolution than the downstream kicker shortwave, at least prior to 18z Saturday. Thereafter the kicker might serve to dampen the eastern US trof right at the moment that it might otherwise form a closed contour, but while our storm is in the incubation stages I think the synoptic influence moves in the downstream direction.

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Here we are on October 27th, and these are the SREF's at 51 hours.

http://www.meteo.psu...PNE_21z/f51.gif

If Ji and JB had a baby that kid couldn't even dream up such an early season scenario

great disco in this thread, I'll return to lurking mode

btw what was that model that mostly specializes in convective scenarios that people were posting last year that seemed to nail some of the deform banding especially prior to the boxing day storm?

thanx

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btw what was that model that mostly specializes in convective scenarios that people were posting last year that seemed to nail some of the deform banding especially prior to the boxing day storm?

SPC-WRF...only runs to 36 hours so we don't really have an idea what's going on yet. It's best within 30 hr.

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If Ji and JB had a baby that kid couldn't even dream up such an early season scenario

great disco in this thread, I'll return to lurking mode

btw what was that model that mostly specializes in convective scenarios that people were posting last year that seemed to nail some of the deform banding especially prior to the boxing day storm?

thanx

MM5, spc wrf, ARW, NMM, and the RUC are all pretty good short range models..HRRR is decent too

who's staying up for the euro? :scooter:

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