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February mid to long range threats discussion


Ji

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Can someone explain what the Euro Control Run is?  Is this taken from the Ensembles?  Most accurate?

 

Ensembles are lower resolution than the op and they all start with slightly different initial conditions (perturbed) than the op run except for one ensemble member. The control run. 

 

Basically, the euro control and gefs control members are the only ensemble members that initialize with identical initial conditions as the higher res op runs. 

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Can someone explain what the Euro Control Run is?  Is this taken from the Ensembles?  Most accurate?

Someone can correct me if I'm wrong, but my understanding is that the control run is run at the same (lower) resolution as the ensembles, but without the perturbed initial conditions that each ensemble member starts with (in other words, the same initial conditions as the main run).

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Someone can correct me if I'm wrong, but my understanding is that the control run is run at the same (lower) resolution as the ensembles, but without the perturbed initial conditions that each ensemble member starts with (in other words, the same initial conditions as the main run).

 

So that means when using it to forecast it should be given the weight of any other individual ensemble member? Which is of course very low.

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I'm only looking at the plate and the box. If the guy at the plate strikes out and ends the inning the I don't care who's up next until the other team bats. 

 

Honestly, I'd much prefer a 2-4/3-5 deal with the lead vort so I don't have to give a crap about the complicated part working out. I'm not chasing anything except accum snow. However small it may be. 

I wouldn't say "no" to a 2-4, but that doesn't get us to the WSW/warning criteria I want for at least one storm. I could care less about nickel and diming to climo snow, that adds up to a crap winter from where I sit. Just want one good storm of 5+ inches area-wide. If the second vort has a shot at that, I am all for rooting that the lead vort go away as quickly as possible.

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Ensembles are lower resolution than the op and they all start with slightly different initial conditions (perturbed) than the op run except for one ensemble member. The control run. 

 

Basically, the euro control and gefs control members are the only ensemble members that initialize with identical initial conditions as the higher res op runs. 

Thanks, Bob.  The difference between the OP and Control are OP runs at a higher resolution?

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Thanks, Bob.  The difference between the OP and Control are OP runs at a higher resolution?

 

Yes. The value is whether they diverge or look similar during medium leads. It's a sign that the higher resolution could be overdoing something and lowers confidence in the op depiction. When they look very similar is raises confidence. 

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So that means when using it to forecast it should be given the weight of any other individual ensemble member? Which is of course very low.

Only use the control when nothing else looks good and it shows hope.
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I know it seems depressing around here, but if you took a step back, looked at both the EURO & GFS ensembles for February, you'd be pretty excited right now.

I'm with you man but this argument is like trying to convince the tea party we need more government regulation in here. The audience is not very receptive.

ETA: given the pattern and the indication it nat last a while I still think we have a 50% chance of scoring a warning criteria event. Only issue is do we take heads or tails ???

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One difference on this model run from our last systems that have gone north of us is the ridge in the west.  Look how far east it is compared to where it was with the earlier systems. That prevents the second shortwave from digging too sharply and amplifying too far west.  I have no clue whether it is right or wrong but do think it shows how much uncertainty remains.  The UKmet had a diggy look but with the low farther north but not as bad looking as the euro. 

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