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12/19-12/20 threat


CoastalWx

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Now that the models are keying in on a totally non-baroclinic southern stream wave, I would be surprised if any models show development, including the UK or ECM unless something else incites southern cyclogenesis. The Pacific NW wave the models had last night doesn't seem strong enough without the southern stream anomaly.

We'll see...I don't think the southern stream has everything to do with it right now...though its definitely hurting that it puts into a wood chipper as it heads east....but I think whats going on north of us is hurting a lot. We're seeing a lot of lingering low heights from the PV up near Maine which is not good. The NAM does a decent job clearing that out which is why the NAM solution would likely be a hit.

I think its a combo of those thing. Ukie doesn't look good up there but it has some potent energy going into the base of the trough, so it will probably try to make a late hook....not sure if it will be enough, but it will certainly be well west of its 12z run. GGEM looks terrible like the GFS...maybe not quite as terrible, but it doesn't make a difference for us...just a closer miss.

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But all models have a low run up the b/c zone off the coast. I'm hanging onto some amplification in time to hook into me...

You bring up a good point. What you need to incite incipient cyclogenesis is a respectable baroclinic wave. If a sufficiently strong baroclinic wave is not present, either weak or no cyclogenesis at all will develop. This is why the models still show weak off coast development but no strong cyclone. That southern stream wave was the only hope for deeper and more intense cyclogenesis.

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Like I said before, I really think the timing of the Pac NW s/w is important here. The runs that have produced hits have dropped that thing down the back side of the trough in the plains.. but the 00z GFS slowed the s/w down and so by the time the s/w reaches the plains the trough is already flattening. The 12z euro was also slower with that s/w. The NAM is the fastest with it.

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We'll see...I don't think the southern stream has everything to do with it right now...though its definitely hurting that it puts into a wood chipper as it heads east....but I think whats going on north of us is hurting a lot. We're seeing a lot of lingering low heights from the PV up near Maine which is not good. The NAM does a decent job clearing that out which is why the NAM solution would likely be a hit.

I think its a combo of those thing. Ukie doesn't look good up there but it has some potent energy going into the base of the trough, so it will probably try to make a late hook....not sure if it will be enough, but it will certainly be well west of its 12z run. GGEM looks terrible like the GFS...maybe not quite as terrible, but it doesn't make a difference for us...just a closer miss.

Yeah, I see what you are saying. Most of my thoughts are based off ECM and its trends with that southern anomaly. A late hook is possible without it if the northern vortex has the perfect orientation, but without the southern anomaly we have now gone from a "thread the needle" storm to a "so you are saying I have a chance?" from Harry in Dumb and Dumber storm.

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Like I said before, I really think the timing of the Pac NW s/w is important here. The runs that have produced hits have dropped that thing down the back side of the trough in the plains.. but the 00z GFS slowed the s/w down and so by the time the s/w reaches the plains the trough is already flattening. The 12z euro was also slower with that s/w

Yeah we definitely need that sucker to inject some energy into the base of the trough. We saw it happen on the 18z GFS with almost nothing in the southern stream.

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Waiting for the Euro at this point seems like waiting on the beach for a tsunami to come...you know you aren't supposed to be there and that it will end badly, but you can't help but watch.

It will probably be like 500 miles offshore.

and if it is my productivity level will go up about 300% because I can finally stop hitting F5 for a little while...

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The only model with any semblance of major winter storm has jumped ship.    Can we please lay this weekend to rest, finally?    These are times it's nice having a job to go to instead of waiting for the Euro to show a solution 500 miles east of the gfs.

I'm starting to wonder if we don't get even a moderate event until 2011.   Many decent or even good winters began after the New Year,   which is dissapointing but better than nothing.

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