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burrel2

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Posts posted by burrel2

  1. Couple thoughts on the potential phasing: It seems like the 18z models diverge on whether or not the baja low gets left behind around hr 60-66.  Are we to believe the NAM/RGEM at hour 60 or the GFS/ICON?

    For the 00z runs tonight, we will be at hour 54 of the divergence... have to think that close to it happening, we will get some resolution. 

    FWIW, the 12z Ukmet was actually similar looking to the 18z NAM at 5h with the phasing, just not as strong, and I  think the ukmet has a dry bias as well on the n/w side of a precip shield.

     

     

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  2. I could see the day 7/8 thing working out. Euro looks perfect with the progression of the Baja low across the southeast… just doesn’t have any northern energy dropping down to help amplify it. Cmc has the same feature but phases it with the northern stream and boom! Gfs doesn’t have the Baja low but does have a northern stream disturbance dropping down. 

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  3. Imo, it's pretty much game over for the upstate if the baja low doesn't get mostly sucked up in to the trough.  The 06z Euro still did this but it was starting to leave a tail of energy behind compared to previous runs. The 12z Nam and 12z Icon sucks it up in a similar fashion, the mostly catch it but leave a bit of a trail behind.

    The 12z Rgem leaves a little bit more of it behind.. longer tail, less precip. 

    12z GFS leaves it completely behind (so much so that it's showing a very weak secondary wave of precip from it. 

     

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  4. In case anyone was wondering, here's what all the overnight model runs showed for Clemson, SC.  

      1pm friday 7pm friday total liquid snow notes
    00z ukmet 32/23 32/23 .49(all snow) 5 inch, 10:1(would be higher)
    doesn't start until after 7pm friday, finishes 8am saturday
    00z Euro 30/24 28/24 .65(mostly snow) 7 inch kuchera
    starts 7am friday, 800mb warm nose right at freezing to start, higher ratio snow on back end. ends 3 or 4am saturday
    00z CMC 34/30 30/27 .06(all snow) Trace kuchera  
    06z GFS 30/24 28/24 .04 (all snow) .25 inch kuchera
    starts 3-4pm friday, only last an hour or tow(fringed)
    06z NAM 29/23 N/A N/A N/A  
    06z Rgem 33/30 N/A .08(all snow) .5 inch kuchera
    still ripping at end of run, more to come
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  5. This old tidbit seems relevant tonight...

    UKMET

    Subjectively Observed Bias
    Geographical location of bias
    Annual/Diurnal attribute
    Submitted by
    Date Submitted
    Operational Implication
    Suspected Cause
    Seems better than GFS with forecast of phasing of systems in northern and southern branch of jet
    North American middle latitudes
    Anytime
    NCEP WPC
    Since fall of 2001
    When GFS is showing phasing of systems beyond 84 hours, check UKMET to see if solution is consistent
    GDAS ?
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