Jump to content
  • Member Statistics

    17,610
    Total Members
    7,904
    Most Online
    NH8550
    Newest Member
    NH8550
    Joined

December 26-27 Storm Threat


Baroclinic Zone

Recommended Posts

I have no clue, and not sure about the euro either, so take everything fwiw. They state that the gfs had problems with vorticity and RH fields up in the Dakotas. Is this why the gfs jumped?? We don't know. NCEP basically said to take these runs with caution. That's all.

What did the local mets say specifically? I never watch....maybe Harv sometimes but that's it.

Link to comment
Share on other sites

  • Replies 1.8k
  • Created
  • Last Reply

So GEFS are taint too? La Epic NCEP disarray on probably the busiest day of the year for going to Grandmas house down south.

Yes, but to what degree? It's possible the west outliers had perturbations that would have negated the errors at init. If there are some wide right and some extreme left the trick will be figuring out which ones zeroed down the errors.

If I understand the process correctly this could have potentially been caught prior to the models being run. This is normally when they'd adjust an ob or delete it. No idea what happened there, what a shame.

Like Scott I'm also not sold it had an epic impact.

Link to comment
Share on other sites

I have no clue, and not sure about the euro either, so take everything fwiw. They state that the gfs had problems with vorticity and RH fields up in the Dakotas. Is this why the gfs jumped?? We don't know. NCEP basically said to take these runs with caution. That's all.

Thanks, would be great if a jump like this happens, we have had jumps go the other way at this time many many many times. Nice to see everything else go back west, should be great weekend to drink egg nog, eat ham and pie, watch the joy of kids faces as they open presents and track a storm when there is time. HO HO HO

Link to comment
Share on other sites

What did the local mets say specifically? I never watch....maybe Harv sometimes but that's it.

Ch7, Dylan Dryer said that the storm may be closer BUT (kudos for this) there were problems with the models so things are uncertain.

Ch4, Some guy, said it could be a big storm based on the latest models.

Lots of waffling etc on both forecasts and told to stay tuned.

Link to comment
Share on other sites

A lot of them look pretty far west to me.

Yes, but to what degree? It's possible the west outliers had perturbations that would have negated the errors at init. If there are some wide right and some extreme left the trick will be figuring out which ones zeroed down the errors.

If I understand the process correctly this could have potentially been caught prior to the models being run. This is normally when they'd adjust an ob or delete it. No idea what happened there, what a shame.

Like Scott I'm also not sold it had an epic impact.

Link to comment
Share on other sites

I am actually wondering... If the GFS didn't show a bomb.. and there still were initialization errors... would HPC even have said anything to us that there was init. errors?

Absolutely. Any data organization--government or otherwise--survives because of the accuracy and reliability of what they produce. Their error has to be recognized lest the resultant forecasts risk inaccuracy.

Plus, there's more at stake with their products than just a coastal US storm.

Link to comment
Share on other sites

Will weren't you looking for at least one global to support the GFS, does the JMA count? Snowman.gif

axesmiley.png

I think the fact that the other globals are so far east of it is a big red flag IMHO. They are inching west, but in order to believe a track well inside in the BM, you'd like to at least some other guidance remotely close. The Euro may be that piece of guidance. But if the Euro is something like last night (or even slightly W), it will confirm to me that the GFS is likely out to lunch.

We can't solve the phase issues in our head like the models can, so there is no use pretending we know if its going to phase like the GFS or not just by eyeballing satellite or maps (at least this early in the game)....one thing we can go on is longer wave trough positions and experience...and modelogy...and those things generally point to the GFS solution being too far west.

Link to comment
Share on other sites

It would be folly to vest too much interest in this run of the EC until after NCEP comments on it around 230 in the updated diagnostic, just my .02 based on what they said about the 0z EC not being very good. We are talking about the two major features that dig down into this trough that on the GFS were much further SW and stronger. This isn't just about 500mb placement either, I don't think I've ever seen a case where it went to this extreme and we're talking about many different levels of the atmosphere. Very cryptic wording as they don't go on to say exactly what the errors were - features stronger, larger, weaker?

There's hope maybe the EC folk caught this prior to running the model but who knows.

INITIALIZATION ERRORS IN NUMEROUS DIAGNOSTIC

QUANTITIES...INCLUDING HEIGHT/VORTICITY FIELDS/RH...ARE EVIDENT IN

BOTH THE 12Z NAM/GFS WITH SMALL BUT LIKELY SIGNIFICANT SHORTWAVE

TROUGHS OVER SOUTH DAKOTA/NEBRASKA ALONG WITH

SASKATCHEWAN/MANITOBA...WITH THESE AREAS ALSO NOT PARTICULARLY

RESOLVED OR PREDICTED WELL BY THE 00Z ECMWF

Link to comment
Share on other sites

Absolutely. Any data organization--government or otherwise--survives because of the accuracy and reliability of what they produce. Their error has to be recognized lest the resultant forecasts risk inaccuracy.

Plus, there's more at stake with their products than just a coastal US storm.

Appears to be getting better for us westerners.:guitar: .

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

Guest
This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...